Engineering topics

Wheeler, Lance Michael

Publications and source records attributed to Wheeler, Lance Michael.

5 records

DOE OSTI2024

Thermal diode and thermal switch for bi-directional heat transfer in building envelopes

The present disclosure relates to a directional heat transfer using thermal control devices, including a dual phase change thermal diode and an active contact-based thermal switch. The thermal diode includes a positive temperature coefficient switching material and a negative temperature coefficient switching material arranged in series. The thermal switch includes two thermally conducting surfaces which may be moved to contact (i.e., having a distance between them of substantially zero) creating minimal thermal contact resistance. Both thermal control devices may be used to control heat flow into and/or out of a building.

Kishore, Ravi Anant↗

DOE OSTI2024

Thermochromic metal halide perovskite windows with ideal transition temperatures

The present disclosure relates to a composition that includes a first phase that includes a perovskite and a second phase that includes a salt, a polymer, and a switching molecule, where the first phase and the second phase are in physical contact, and the composition is capable of reversibly switching between a substantially opaque state and a substantially transparent state.

Rosales, Bryan Anthony↗

DOE OSTI2023

Energy-harvesting chromogenic devices

The present disclosure relates to devices that include a perovskite, where, when a first condition is met, at least a portion of the perovskite is in a first phase that substantially transmits light, when a second condition is met, at least a portion of the perovskite is in a second phase that substantially absorbs light, and the perovskite is reversibly switchable between the first phase and the second phase by reversibly switching between the first condition and the second condition.

Wheeler, Lance Michael↗

DOE OSTI2023

All-back-contact perovskite solar cells

The present disclosure relates to an all-back-contact photovoltaic device that includes, in order, a substrate, a first electrode having a first surface, an insulator, a second electrode having a second surface, and an active material, where the insulator and the second electrode form a cavity, the active material substantially fills the cavity and is in physical contact with the first surface and the second surface, the insulator includes a first layer and a second layer with the second layer positioned between the first layer and the second contact, and the first layer is constructed of a first material that is different than a second material used to construct the second layer.

Prince, Kevin Joseph↗

DOE OSTI2023

Switchable photovoltaic devices

The present disclosure relates to a composition that includes a scaffold having an internal space and a mixture positioned within the space, where the mixture includes a first phase having a metal halide perovskite and a second phase including at least one of a perovskite precursor and/or a switching molecule, the composition is capable of reversibly switching between a first state having at least one of a first transparency and/or a first color and a second state having at least one of a second transparency and/or a second color.

Wheeler, Lance Michael↗