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DOE OSTI2020

Materials Data on CsHo(MoO4)2 by Materials Project

CsHo(MoO4)2 crystallizes in the orthorhombic Pccm space group. The structure is three-dimensional. Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (3.18 Å) and four longer (3.44 Å) Cs–O bond lengths. Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.28 Å) and four longer (2.49 Å) Ho–O bond lengths. Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–1.86 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ho3+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cs1+, one Ho3+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Cs1+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsEr(MoO4)2 by Materials Project

CsEr(MoO4)2 crystallizes in the orthorhombic Pccm space group. The structure is three-dimensional. Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (3.12 Å) and four longer (3.36 Å) Cs–O bond lengths. Er3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.29 Å) and four longer (2.47 Å) Er–O bond lengths. Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–1.87 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Er3+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cs1+, one Er3+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Cs1+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsTb(MoO4)2 by Materials Project

CsTb(MoO4)2 crystallizes in the orthorhombic Pccm space group. The structure is three-dimensional. Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (3.21 Å) and four longer (3.45 Å) Cs–O bond lengths. Tb3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.29 Å) and four longer (2.55 Å) Tb–O bond lengths. Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.76–1.85 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Tb3+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cs1+, one Tb3+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Cs1+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsH7(C2O5)2 by Materials Project

CsH7(C2O5)2 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one CsH7(C2O5)2 sheet oriented in the (0, 0, 1) direction. Cs1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Cs–O bond distances ranging from 3.07–3.48 Å. There are four inequivalent C3+ sites. In the first C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.28 Å) C–O bond length. In the second C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.23 Å) and one longer (1.32 Å) C–O bond length. In the third C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.31 Å) C–O bond length. In the fourth C3+ site, C3+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.31 Å) C–O bond length. There are seven inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.05 Å) and one longer (1.50 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.09 Å) and one longer (1.39 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.10 Å) and one longer (1.37 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Cs1+ and one C3+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Cs1+, one C3+, and one H1+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Cs1+, one C3+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one C3+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one C3+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cs1+, one C3+, and one H1+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one C3+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one C3+ and one H1+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Cs1+ and three H1+ atoms. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cs1+ and three H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Efficient Mn 2+ Doping in Non-Stoichiometric Cesium Lead Bromide Perovskite Quantum Dots

Doping magnetic transition metal ions (e.g., Mn 2+ ) into colloidal quantum dots endows novel optical and magnetic properties to the host materials. CsPbBr 3 quantum dots (QDs) are emerging light-emitting materials with high structural and chemical flexibility in the visible spectral regime. However, efficiently doping Mn 2+ ions in CsPbBr 3 QDs remains challenging, especially when size confinement and ensemble uniformity are needed for understanding the underexplored exciton-dopant exchange interaction. Here, we introduce a doping mechanism based on electrostatic surface Mn 2+ adsorption that enables efficient Mn 2+ incorporation in strongly confined CsPbBr 3 QDs. The resultant QDs are found to have a Cs-deficient stoichiometry compared to their undoped counterparts. A redox reaction-based purification method was developed to remove Mn 2+ cations that are tightly adsorbed on the surface to determine the concentration of lattice-incorporated Mn 2+ . Our synthesis enables a Mn 2+ doping/alloying concentration of up to ∼44% with a Mn 2+ photoluminescence efficiency exceeding 90%. This allows for the determination of the intrinsic exciton-to-dopant energy transfer rate.

Hidayatova, Lamia [Univ. of Oklahoma, Norman, OK (↗
DOE OSTI2020

Materials Data on Cs5YO4 by Materials Project

Cs5YO4 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Cs–O bond distances ranging from 2.95–3.27 Å. In the second Cs1+ site, Cs1+ is bonded in a 2-coordinate geometry to four O2- atoms. There are two shorter (2.84 Å) and two longer (3.53 Å) Cs–O bond lengths. Y3+ is bonded in a tetrahedral geometry to four O2- atoms. There are two shorter (2.18 Å) and two longer (2.20 Å) Y–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to five Cs1+ and one Y3+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to five Cs1+ and one Y3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3FeBr5 by Materials Project

Cs3FeBr5 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are a spread of Cs–Br bond distances ranging from 3.60–3.91 Å. In the second Cs1+ site, Cs1+ is bonded in a 2-coordinate geometry to ten Br1- atoms. There are two shorter (3.64 Å) and eight longer (4.17 Å) Cs–Br bond lengths. Fe2+ is bonded in a tetrahedral geometry to four equivalent Br1- atoms. All Fe–Br bond lengths are 2.42 Å. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 1-coordinate geometry to five Cs1+ and one Fe2+ atom. In the second Br1- site, Br1- is bonded to six Cs1+ atoms to form corner-sharing BrCs6 octahedra. The corner-sharing octahedra tilt angles range from 0–36°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsLi(PO3)2 by Materials Project

CsLi(PO3)2 crystallizes in the orthorhombic Fdd2 space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 2-coordinate geometry to eleven O2- atoms. There are a spread of Cs–O bond distances ranging from 3.15–3.69 Å. In the second Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Cs–O bond distances ranging from 3.00–3.63 Å. There are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Li–O bond distances ranging from 1.96–2.01 Å. In the second Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Li–O bond distances ranging from 1.93–2.05 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two LiO4 tetrahedra and corners with two PO4 tetrahedra. There is two shorter (1.50 Å) and two longer (1.63 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two LiO4 tetrahedra and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.64 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with two PO4 tetrahedra. There is two shorter (1.50 Å) and two longer (1.63 Å) P–O bond length. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cs1+ and two P5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Cs1+ and two P5+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+, one Li1+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Cs1+ and two P5+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+, one Li1+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+, one Li1+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+ and two P5+ atoms. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Cs1+, one Li1+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Cs1+, one Li1+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Cs1+, one Li1+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Cs1+, one Li1+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to two Cs1+, one Li1+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs2Ti(CuSe2)2 by Materials Project

Cs2Ti(CuSe2)2 crystallizes in the tetragonal P4_2/mcm space group. The structure is three-dimensional. Cs1+ is bonded in a body-centered cubic geometry to eight equivalent Se2- atoms. There are four shorter (3.72 Å) and four longer (3.75 Å) Cs–Se bond lengths. Ti4+ is bonded to four equivalent Se2- atoms to form TiSe4 tetrahedra that share edges with four equivalent CuSe4 tetrahedra. All Ti–Se bond lengths are 2.42 Å. Cu1+ is bonded to four equivalent Se2- atoms to form CuSe4 tetrahedra that share corners with four equivalent CuSe4 tetrahedra and edges with two equivalent TiSe4 tetrahedra. All Cu–Se bond lengths are 2.49 Å. Se2- is bonded in a 7-coordinate geometry to four equivalent Cs1+, one Ti4+, and two equivalent Cu1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3Gd(PO4)2 by Materials Project

Cs3Gd(PO4)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are six inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 2.98–3.62 Å. In the second Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 3.05–3.70 Å. In the third Cs1+ site, Cs1+ is bonded in a 2-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 2.97–3.51 Å. In the fourth Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 2.96–3.55 Å. In the fifth Cs1+ site, Cs1+ is bonded in a 4-coordinate geometry to nine O2- atoms. There are a spread of Cs–O bond distances ranging from 3.04–3.54 Å. In the sixth Cs1+ site, Cs1+ is bonded to eight O2- atoms to form CsO8 hexagonal bipyramids that share corners with two PO4 tetrahedra, an edgeedge with one GdO6 octahedra, edges with three PO4 tetrahedra, and a faceface with one GdO6 octahedra. There are a spread of Cs–O bond distances ranging from 3.02–3.47 Å. There are two inequivalent Gd3+ sites. In the first Gd3+ site, Gd3+ is bonded to six O2- atoms to form GdO6 octahedra that share corners with four PO4 tetrahedra, an edgeedge with one CsO8 hexagonal bipyramid, and an edgeedge with one PO4 tetrahedra. There are a spread of Gd–O bond distances ranging from 2.25–2.44 Å. In the second Gd3+ site, Gd3+ is bonded to six O2- atoms to form GdO6 octahedra that share corners with four PO4 tetrahedra, an edgeedge with one PO4 tetrahedra, and a faceface with one CsO8 hexagonal bipyramid. There are a spread of Gd–O bond distances ranging from 2.25–2.44 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CsO8 hexagonal bipyramid, a cornercorner with one GdO6 octahedra, an edgeedge with one CsO8 hexagonal bipyramid, and an edgeedge with one GdO6 octahedra. The corner-sharing octahedral tilt angles are 16°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three GdO6 octahedra and an edgeedge with one CsO8 hexagonal bipyramid. The corner-sharing octahedra tilt angles range from 10–24°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CsO8 hexagonal bipyramid, a cornercorner with one GdO6 octahedra, an edgeedge with one CsO8 hexagonal bipyramid, and an edgeedge with one GdO6 octahedra. The corner-sharing octahedral tilt angles are 21°. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three GdO6 octahedra. The corner-sharing octahedra tilt angles range from 4–27°. There are a spread of P–O bond distances ranging from 1.53–1.57 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two Cs1+, one Gd3+, and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to four Cs1+, one Gd3+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to five Cs1+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Cs1+, one Gd3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three Cs1+, one Gd3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Cs1+, one Gd3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Cs1+, one Gd3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Cs1+, one Gd3+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a distorted linear geometry to two Cs1+, one Gd3+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to three Cs1+, one Gd3+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a distorted linear geometry to three Cs1+, one Gd3+, and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Cs1+, one Gd3+, and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a distorted single-bond geometry to five Cs1+ and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Cs1+, one Gd3+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3Y(PO4)2 by Materials Project

Cs3Y(PO4)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are six inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 1-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 2.99–3.70 Å. In the second Cs1+ site, Cs1+ is bonded in a 2-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 2.99–3.49 Å. In the third Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 2.96–3.64 Å. In the fourth Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 3.07–3.67 Å. In the fifth Cs1+ site, Cs1+ is bonded to eight O2- atoms to form distorted CsO8 hexagonal bipyramids that share corners with two PO4 tetrahedra, an edgeedge with one YO6 octahedra, edges with three PO4 tetrahedra, and a faceface with one YO6 octahedra. There are a spread of Cs–O bond distances ranging from 3.02–3.53 Å. In the sixth Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 2.99–3.58 Å. There are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to six O2- atoms to form YO6 octahedra that share corners with four PO4 tetrahedra, an edgeedge with one PO4 tetrahedra, and a faceface with one CsO8 hexagonal bipyramid. There are a spread of Y–O bond distances ranging from 2.22–2.39 Å. In the second Y3+ site, Y3+ is bonded to six O2- atoms to form YO6 octahedra that share corners with four PO4 tetrahedra, an edgeedge with one CsO8 hexagonal bipyramid, and an edgeedge with one PO4 tetrahedra. There are a spread of Y–O bond distances ranging from 2.21–2.38 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CsO8 hexagonal bipyramid, a cornercorner with one YO6 octahedra, an edgeedge with one CsO8 hexagonal bipyramid, and an edgeedge with one YO6 octahedra. The corner-sharing octahedral tilt angles are 16°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three YO6 octahedra and an edgeedge with one CsO8 hexagonal bipyramid. The corner-sharing octahedra tilt angles range from 9–24°. There is two shorter (1.54 Å) and two longer (1.57 Å) P–O bond length. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three YO6 octahedra. The corner-sharing octahedra tilt angles range from 6–25°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CsO8 hexagonal bipyramid, a cornercorner with one YO6 octahedra, an edgeedge with one CsO8 hexagonal bipyramid, and an edgeedge with one YO6 octahedra. The corner-sharing octahedral tilt angles are 20°. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Cs1+, one Y3+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to five Cs1+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Cs1+, one Y3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted linear geometry to two Cs1+, one Y3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Cs1+, one Y3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Cs1+, one Y3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to five Cs1+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted linear geometry to three Cs1+, one Y3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to three Cs1+, one Y3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Cs1+, one Y3+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to three Cs1+, one Y3+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a 2-coordinate geometry to two Cs1+, one Y3+, and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Cs1+, one Y3+, and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to four Cs1+, one Y3+, and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a distorted single-bond geometry to five Cs1+ and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Toward Improved Charge Separation through Conformational Control in Copper Coordination Complexes

The continued development of solar energy as a renewable resource necessitates the design and study of new approaches to sustaining photodriven charge separation (CS). To this end, we present a bioinspired approach in which triggered conformational changes are used to control electron transfer (ET) events. We report, photo-induced conformational rearrangements of a ligand are translated into changes in the coordination geometry and environment about a bound metal ion. Taking advantage of the differential coordination properties of Cu I and Cu II , these dynamics facilitate intramolecular ET from Cu I to the ligand to create a CS state. The synthesis and photophysical characterization of CuCl(dpaa R ) (dpaa = dipicolylaminoacetophenone, with R = H and OMe) is presented. These ligands incorporate a fluorophore into their framework that gives rise to a twisted intramolecular charge transfer (TICT) excited state. Excited state ligand twisting provides a tetragonal coordination geometry capable of capturing Cu II in the CS state when an internal ortho-OMe binding site is present (as in dpaaOMe). We employ NMR, IR, EPR, and optical spectroscopies, X-ray diffraction, and electrochemical methods to establish the ground state properties of the Cu I and Cu II complexes. We then investigate the photophysical dynamics of these Cu I complexes via time-resolved photoluminescence (TR-PL), and optical transient absorption (OTA) spectroscopies. We show that relative to controls lacking a TICT-active ligand, the lifetime of the CS state is enhanced ~1000-fold. Further, the presence of the ortho-OMe substituent greatly enhances the lifetime of the TICT* state and biases the coordination environment toward Cu II . The presence of Cu I decreases photoinduced degradation from 14 to <2% but does not result in significant quenching via ET. Factors affecting CS in these systems are discussed, laying the groundwork for our strategy toward solar energy conversion.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2020

Materials Data on Cs3H(SeO4)2 by Materials Project

Cs3H(SeO4)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 3.24–3.55 Å. In the second Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to six O2- atoms. There are two shorter (3.14 Å) and four longer (3.23 Å) Cs–O bond lengths. H1+ is bonded in a linear geometry to two equivalent O2- atoms. Both H–O bond lengths are 1.23 Å. Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.74 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Cs1+, one H1+, and one Se6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one Se6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs2Ti(PO4)2 by Materials Project

Cs2Ti(PO4)2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 3.07–3.56 Å. In the second Cs1+ site, Cs1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 3.05–3.77 Å. Ti4+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Ti–O bond distances ranging from 1.67–2.01 Å. P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.64 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Cs1+, one Ti4+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one Ti4+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two Cs1+, one Ti4+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three Cs1+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+ and two equivalent P5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3H(SeO4)2 by Materials Project

Cs3H(SeO4)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to two equivalent H1+ and ten O2- atoms. Both Cs–H bond lengths are 3.26 Å. There are a spread of Cs–O bond distances ranging from 3.08–3.50 Å. In the second Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Cs–O bond distances ranging from 3.14–3.44 Å. H1+ is bonded in a linear geometry to two equivalent Cs1+ and two equivalent O2- atoms. Both H–O bond lengths are 1.22 Å. Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.74 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three Cs1+ and one Se6+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to four Cs1+ and one Se6+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to three Cs1+, one H1+, and one Se6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsNa5(WN3)2 by Materials Project

CsNa5(WN3)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 6-coordinate geometry to four N3- atoms. There are a spread of Cs–N bond distances ranging from 3.13–3.33 Å. In the second Cs1+ site, Cs1+ is bonded in a 3-coordinate geometry to three N3- atoms. There are two shorter (3.06 Å) and one longer (3.27 Å) Cs–N bond lengths. There are ten inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 3-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.43–3.02 Å. In the second Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.49–2.69 Å. In the third Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.55–2.78 Å. In the fourth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six N3- atoms. There are a spread of Na–N bond distances ranging from 2.52–3.12 Å. In the fifth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four N3- atoms. There are a spread of Na–N bond distances ranging from 2.45–2.74 Å. In the sixth Na1+ site, Na1+ is bonded to four N3- atoms to form distorted NaN4 tetrahedra that share corners with four WN4 tetrahedra and an edgeedge with one NaN4 tetrahedra. There are a spread of Na–N bond distances ranging from 2.42–2.55 Å. In the seventh Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.42–2.88 Å. In the eighth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.52–2.82 Å. In the ninth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.53–2.94 Å. In the tenth Na1+ site, Na1+ is bonded to four N3- atoms to form distorted NaN4 tetrahedra that share corners with four WN4 tetrahedra and an edgeedge with one NaN4 tetrahedra. There are a spread of Na–N bond distances ranging from 2.47–2.51 Å. There are four inequivalent W6+ sites. In the first W6+ site, W6+ is bonded to four N3- atoms to form WN4 tetrahedra that share corners with two NaN4 tetrahedra and corners with two WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.83–1.93 Å. In the second W6+ site, W6+ is bonded to four N3- atoms to form WN4 tetrahedra that share corners with two WN4 tetrahedra and corners with four NaN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.84–1.94 Å. In the third W6+ site, W6+ is bonded to four N3- atoms to form WN4 tetrahedra that share corners with two NaN4 tetrahedra and corners with two WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.84–1.96 Å. In the fourth W6+ site, W6+ is bonded to four N3- atoms to form corner-sharing WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.84–1.94 Å. There are twelve inequivalent N3- sites. In the first N3- site, N3- is bonded in a 6-coordinate geometry to one Cs1+, four Na1+, and one W6+ atom. In the second N3- site, N3- is bonded to four Na1+ and two W6+ atoms to form distorted corner-sharing NNa4W2 octahedra. The corner-sharing octahedral tilt angles are 45°. In the third N3- site, N3- is bonded in a 5-coordinate geometry to one Cs1+, three Na1+, and one W6+ atom. In the fourth N3- site, N3- is bonded in a 7-coordinate geometry to one Cs1+, five Na1+, and one W6+ atom. In the fifth N3- site, N3- is bonded in a 6-coordinate geometry to five Na1+ and one W6+ atom. In the sixth N3- site, N3- is bonded in a 7-coordinate geometry to one Cs1+, five Na1+, and one W6+ atom. In the seventh N3- site, N3- is bonded in a 6-coordinate geometry to one Cs1+, three Na1+, and two W6+ atoms. In the eighth N3- site, N3- is bonded in a 6-coordinate geometry to one Cs1+, three Na1+, and two W6+ atoms. In the ninth N3- site, N3- is bonded in a 3-coordinate geometry to one Cs1+, three Na1+, and one W6+ atom. In the tenth N3- site, N3- is bonded in a 6-coordinate geometry to five Na1+ and one W6+ atom. In the eleventh N3- site, N3- is bonded to four Na1+ and two W6+ atoms to form corner-sharing NNa4W2 octahedra. The corner-sharing octahedral tilt angles are 45°. In the twelfth N3- site, N3- is bonded in a 5-coordinate geometry to four Na1+ and one W6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsTi(PS4)2 by Materials Project

CsTi(PS4)2 crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 7-coordinate geometry to seven S+1.88- atoms. There are a spread of Cs–S bond distances ranging from 3.80–4.04 Å. In the second Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine S+1.88- atoms. There are a spread of Cs–S bond distances ranging from 3.69–3.95 Å. There are two inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six S+1.88- atoms to form TiS6 octahedra that share edges with three PS4 tetrahedra. There are a spread of Ti–S bond distances ranging from 2.44–2.48 Å. In the second Ti4+ site, Ti4+ is bonded to six S+1.88- atoms to form TiS6 octahedra that share edges with three PS4 tetrahedra. There are a spread of Ti–S bond distances ranging from 2.43–2.49 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four S+1.88- atoms to form PS4 tetrahedra that share edges with two TiS6 octahedra. There are two shorter (2.05 Å) and two longer (2.06 Å) P–S bond lengths. In the second P5+ site, P5+ is bonded to four S+1.88- atoms to form PS4 tetrahedra that share edges with two TiS6 octahedra. There are one shorter (2.05 Å) and three longer (2.06 Å) P–S bond lengths. In the third P5+ site, P5+ is bonded to four S+1.88- atoms to form PS4 tetrahedra that share an edgeedge with one TiS6 octahedra. There are a spread of P–S bond distances ranging from 1.96–2.18 Å. In the fourth P5+ site, P5+ is bonded to four S+1.88- atoms to form PS4 tetrahedra that share an edgeedge with one TiS6 octahedra. There are a spread of P–S bond distances ranging from 1.96–2.19 Å. There are sixteen inequivalent S+1.88- sites. In the first S+1.88- site, S+1.88- is bonded in a distorted L-shaped geometry to two Cs1+, one Ti4+, and one P5+ atom. In the second S+1.88- site, S+1.88- is bonded in a distorted single-bond geometry to three Cs1+ and one P5+ atom. In the third S+1.88- site, S+1.88- is bonded in a 1-coordinate geometry to two Cs1+, one P5+, and one S+1.88- atom. The S–S bond length is 2.03 Å. In the fourth S+1.88- site, S+1.88- is bonded in a distorted L-shaped geometry to one Cs1+, one Ti4+, and one P5+ atom. In the fifth S+1.88- site, S+1.88- is bonded in an L-shaped geometry to one Ti4+ and one P5+ atom. In the sixth S+1.88- site, S+1.88- is bonded in a distorted single-bond geometry to three Cs1+ and one P5+ atom. In the seventh S+1.88- site, S+1.88- is bonded in a distorted L-shaped geometry to one Cs1+, one Ti4+, and one P5+ atom. In the eighth S+1.88- site, S+1.88- is bonded in a distorted L-shaped geometry to one Cs1+, one Ti4+, and one P5+ atom. In the ninth S+1.88- site, S+1.88- is bonded in an L-shaped geometry to one Ti4+ and one P5+ atom. In the tenth S+1.88- site, S+1.88- is bonded in an L-shaped geometry to one Ti4+ and one P5+ atom. In the eleventh S+1.88- site, S+1.88- is bonded in an L-shaped geometry to one Ti4+ and one P5+ atom. In the twelfth S+1.88- site, S+1.88- is bonded in a distorted L-shaped geometry to one Cs1+, one Ti4+, and one P5+ atom. In the thirteenth S+1.88- site, S+1.88- is bonded in an L-shaped geometry to one Ti4+ and one P5+ atom. In the fourteenth S+1.88- site, S+1.88- is bonded in a distorted L-shaped geometry to one Cs1+, one Ti4+, and one P5+ atom. In the fifteenth S+1.88- site, S+1.88- is bonded in a distorted water-like geometry to one P5+ and one S+1.88- atom. In the sixteenth S+1.88- site, S+1.88- is bonded in a distorted L-shaped geometry to one Cs1+, one Ti4+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs5Na(W2N5)2 by Materials Project

Cs5Na(W2N5)2 crystallizes in the tetragonal I4_1 space group. The structure is three-dimensional. there are three inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 6-coordinate geometry to six N3- atoms. There are a spread of Cs–N bond distances ranging from 3.23–3.69 Å. In the second Cs1+ site, Cs1+ is bonded in a 4-coordinate geometry to four N3- atoms. There are a spread of Cs–N bond distances ranging from 3.24–3.57 Å. In the third Cs1+ site, Cs1+ is bonded in a 6-coordinate geometry to eight N3- atoms. There are a spread of Cs–N bond distances ranging from 3.48–3.74 Å. Na1+ is bonded to four N3- atoms to form distorted NaN4 tetrahedra that share corners with four WN4 tetrahedra. There are two shorter (2.32 Å) and two longer (2.34 Å) Na–N bond lengths. There are two inequivalent W6+ sites. In the first W6+ site, W6+ is bonded to four N3- atoms to form WN4 tetrahedra that share a cornercorner with one NaN4 tetrahedra and corners with three WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.79–1.93 Å. In the second W6+ site, W6+ is bonded to four N3- atoms to form WN4 tetrahedra that share a cornercorner with one NaN4 tetrahedra and corners with three WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.79–1.92 Å. There are five inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted bent 150 degrees geometry to three Cs1+, one Na1+, and one W6+ atom. In the second N3- site, N3- is bonded in a distorted linear geometry to four Cs1+, one Na1+, and one W6+ atom. In the third N3- site, N3- is bonded in a distorted linear geometry to three Cs1+ and two equivalent W6+ atoms. In the fourth N3- site, N3- is bonded in a linear geometry to two Cs1+ and two equivalent W6+ atoms. In the fifth N3- site, N3- is bonded in a distorted bent 150 degrees geometry to two Cs1+ and two W6+ atoms.

36 MATERIALS SCIENCE↗