Photovoltaic window color-conversion layers
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.
1. A photovoltaic (PV) device comprising:
a color-tuning layer comprising a dye positioned within a matrix; and
a PV layer comprising a perovskite, wherein:
the color-tuning layer is capable of absorbing light comprising a first wavelength and emitting light comprising a second wavelength,
the first wavelength is between 400 nm and 700 nm,
the second wavelength is greater than the first wavelength,
the PV layer has a disordered state and an ordered state,
the PV layer is not substantially photoactive when in the disordered state,
the PV layer is configured to absorb a portion of the second wavelength when in the ordered state,
the device is at least partially transparent to light in the visible spectrum when the PV layer is in the disordered, and
the device is at least partially opaque to light in the visible spectrum when the PV layer is in the ordered state.
2. The PV device of claim 1 , wherein the second wavelength is between about 400 nm and 700 nm.
3. The PV device of claim 1 , wherein the matrix comprises at least one of a solid, a liquid, or a gas.
4. The PV device of claim 1 , wherein the dye comprises xanthene dye.
5. The PV device of claim 1 , wherein the dye comprises at least one of an oxazine, a rhodamine, or tris(8-hydroxyquinolinato)aluminum.
6. The PV device of claim 3 , wherein the matrix is a solid.
7. The PV device of claim 6 , wherein the solid matrix comprises at least one of a polymer, a glass, a metal oxide, lithium fluoride, magnesium fluoride, or zinc sulfide.
8. The PV device of claim 7 , wherein the polymer comprises at least one of poly-acrylic acid, poly(methyl methacrylate, poly(vinyl acetate), polyvinylcarbozal, or polystyrene.
9. The PV device of claim 7 , wherein the metal oxide comprises at least one of silica or alumina.
10. The PV device of claim 6 , wherein the matrix comprises a plurality of nanoparticles.
11. The PV device of claim 1 , wherein the color-tuning layer has a thickness between 5 nm and 300 nm.
12. The PV device of claim 1 , wherein:
the PV layer is part of a PV stack, and
the PV stack further comprises:
a hole transfer layer (HTL);
an electron transfer layer (ETL);
a first charge collecting layer; and
a second charge collecting layer; wherein:
the PV layer is positioned between the HTL and the ETL,
the HTL is positioned between the first charge collecting layer and the PV layer, and
the ETL is positioned between the second charge collecting layer and the PV layer.
13. The PV device of claim 12 , wherein:
an intermediate layer comprises at least one layer of the PV stack or a separate layer, and
the intermediate layer is positioned between the PV layer and the color-tuning layer.
14. The device of claim 1 , wherein the PV layer generates a voltage when in the ordered state.