Abstract: The present disclosure relates to a device that includes an irregular network of interconnected ridges in physical contact with a planar substrate and a perovskite layer, where the planar substrate include a support layer and a first charge selective contact layer, the first charge selective contact layer is positioned between the support layer and the interconnected ridges, each ridge includes a second charge selective contact layer and an insulating layer, the insulating layer is positioned between the first charge selective contact layer and the second charge selective contact layer, and the perovskite layer substantially covers the plurality of interconnected ridges and the underlying planar substrate.

Abstract: 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.

Abstract: The present disclosure relates to a device that includes an irregular network of interconnected ridges in physical contact with a planar substrate and a perovskite layer, where the planar substrate include a support layer and a first charge selective contact layer, the first charge selective contact layer is positioned between the support layer and the interconnected ridges, each ridge includes a second charge selective contact layer and an insulating layer, the insulating layer is positioned between the first charge selective contact layer and the second charge selective contact layer, and the perovskite layer substantially covers the plurality of interconnected ridges and the underlying planar substrate.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present disclosure relates to a photovoltaic (PV) device that includes a color-conversion layer that includes at least one of a color-tuning layer and/or an intermediate layer and a photovoltaic layer where the color-conversion layer changes the appearance of the PV device when compared to a similar PV device constructed without the color-conversion layer, the color-conversion layer increases a power output of the PV device by at least one of reflecting light to the PV layer or emitting light which is redirected to the PV layer, and the device is at least partially transparent to light in the visible spectrum.

Abstract: 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.

Abstract: The present disclosure relates to a device that includes a switchable photovoltaic (PV) device that includes a first active material and a static PV device that includes a second active material, where the switchable PV device and the static PV device are positioned substantially parallel to one another, the switchable PV device has a first state that is substantially transparent to a first wavelength of light in the visible spectrum, the switchable PV device has a second state this is substantially opaque to a second wavelength of light in the visible spectrum, the switchable PV device can be reversibly switched between the first state and the second state, the static PV device is substantially transparent to the visible spectrum of light, and both the switchable PV device and static PV device are capable of generating power.

Abstract: The present disclosure relates to a perovskite sheet that includes two outer layers, each including A?X?; and a first layer that includes BX2, where B is a first cation, A? is a second cation, X is a first anion, X? is a second anion, and the first BX2 layer is positioned between the two outer layers.

Abstract: 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.

Abstract: The present disclosure relates to a device that includes a perovskite layer, a first charge-transport layer, and an adhesion layer, where the adhesion layer is positioned between the charge transport layer and the perovskite layer, the adhesion layer forms a first bond with the charge transport layer, and the adhesion layer forms a second bond with the perovskite layer.

Abstract: The present disclosure relates to a device that includes an active layer and a first charge transport layer, where the first charge transport layer includes a first layer and a second layer, the first layer is in contact with the second layer, the second layer is positioned between the first layer and the active layer, the first layer comprises a first carbon nanostructure, and the second layer includes a second carbon nanostructure.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present disclosure relates to a perovskite sheet that includes two outer layers, each including A?X?; and a first layer that includes BX2, where B is a first cation, A? is a second cation, X is a first anion, X? is a second anion, and the first BX2 layer is positioned between the two outer layers.

Abstract: The present disclosure relates to a device that includes a perovskite layer, a first charge-transport layer, and an adhesion layer, where the adhesion layer is positioned between the charge transport layer and the perovskite layer, the adhesion layer forms a first bond with the charge transport layer, and the adhesion layer forms a second bond with the perovskite layer.

Abstract: The present disclosure relates to a device that includes an active layer and a first charge transport layer, where the first charge transport layer includes a first layer and a second layer, the first layer is in contact with the second layer, the second layer is positioned between the first layer and the active layer, the first layer comprises a first carbon nanostructure, and the second layer includes a second carbon nanostructure.