Solar energy and agroproduction structures and facilities
View Patent ↗The invention concerns a transparent or semitransparent film comprising a perovskite material absorbing light within the photosynthetically active radiation (PAR) spectrum.
1 . An agricultural structure comprising a photovoltaic device provided on the structure's roof and/or provided as a roof panel, the photovoltaic device comprising a transparent or semitransparent film comprising or consisting of at least one perovskite material absorbing light within the photosynthetically active radiation (PAR) spectrum,
wherein the at least one perovskite material is MA n FA 1-n Pb(I x Br 1-x ) 3 , wherein variable x is 0.2-0.3 and variable n is 0.2-0.3; or Cs n FA 1-n Pb(I x Br 1-x ) 3 , wherein variable n is 0.15-0.25 and variable x is 0.2-0.4; and
wherein the photovoltaic device is configured to selectively convert light to electricity at wavelengths of 400-610 nm and below, while transmitting light at wavelengths of 620-700 nm.
2 . The structure according to claim 1 , wherein the film is provided on a transparent substrate, having a two dimensional or three-dimensional (curved) surface, wherein the substrate is optionally conductive.
3 . The structure according to claim 1 , comprising or consisting of a substrate, the transparent or semitransparent perovskite film, at least one conductive layer, optionally a scaffold structure layer, and further optionally at least one hole conductive layer.
4 . The structure according to claim 3 , comprising:
a conductive transparent substrate;
the film of a perovskite material;
optionally a hole transporter layer; and
a metal contact.
5 . The structure according to claim 1 , comprising
a titanium oxide continuous conductive layer; and
a titanium oxide particulate layer.
6 . The device according to claim 1 , wherein the perovskite is MA 0.25 FA 0.75 Pb(I 0.25 Br 0.75 ) 3 , or Cs 0.2 FA 0.8 Pb(I 0.3 Br 0.7 ) 3 , or MA n FA 1-n Pb(I x Br 1-x ) 3 , wherein each of x and n, independently of the other, is between 0.2 and 0.3, or Cs n FA 1-n Pb(I x Br 1-x ) 3 , wherein n is between 0.15 and 0.25 and wherein x is between 0.2 and 0.4.
7 . The device according to claim 1 , wherein the perovskite is MA 0.25 FA 0.75 Pb(I 0.25 Br 0.75 ) 3 .
8 . The device according to claim 1 , wherein the perovskite is MA n FA 1-n Pb(I x Br 1-x ) 3 , wherein each of x and n, independently of the other, is between 0.2 and 0.3.
9 . A method for reducing growing temperatures in an agricultural structure in accordance with claim 1 , the method comprising allowing a portion of incident solar radiation to irradiate into the facility through said photovoltaic device to thereby filter the incident light and reducing temperatures within the facility.
10 . The method according to claim 9 , wherein the photovoltaic device is one or more roof panels.