Perovskite solar cell, preparation method thereof, and electric device
View Patent ↗Embodiments of this application provide a perovskite solar cell, a preparation method thereof, and an electric device. The perovskite solar cell includes: a back plate; a transparent substrate, where a sealed cavity is formed between the transparent substrate and the back plate; and a perovskite solar cell device, where the perovskite solar cell device is located in the sealed cavity; where the sealed cavity contains ammonia gas having a volume fraction of 10%-100% and residual inert gas. The 10%-100% ammonia gas can improve chemical stability of a perovskite material, thus improving thermal stability of the perovskite solar cell device, and further improving efficiency and service life of the perovskite solar cell.
1. A perovskite solar cell, comprising:
a back plate;
a transparent substrate, wherein a sealed cavity is formed between the transparent substrate and the back plate; and
a perovskite solar cell device, wherein the perovskite solar cell device is located in the sealed cavity; wherein
the sealed cavity contains ammonia gas having a volume fraction of 50%-70% and residual inert gas; wherein
the inert gas is selected from at least one of nitrogen, argon, helium, and neon, and
a chemical formula of a perovskite material of the perovskite solar cell device is ABX 3 , wherein A comprises an organic amine cation, B is a metal cation, and X is a halogen anion or SCN − , wherein in ABX 3 , A comprises at least one of CH 3 NH 3 + and HC(NH 2 ) 2 + and B comprises at least one of Pb 2 + , Sn 2 + , and Ge 2+ ;
a sealing element, the sealing element connecting the transparent substrate and the back plate to form the sealed cavity;
the sealing element is a sealant;
the sealant is around a periphery of the perovskite solar cell device, and the back plate is fastened to the perovskite solar cell device using the sealant.
2. The perovskite solar cell according to claim 1 , wherein in ABX 3 , A further comprises at least one of Cs + , Rb + , and K + .
3. The perovskite solar cell according to claim 1 , wherein
the sealant is further located on at least part of a surface or the entire surface on a side of the back plate facing toward the perovskite solar cell device.
4. A method for preparing the perovskite solar cell of claim 1 .
5. An electric device, wherein the electric device comprises the perovskite solar cell according to claim 1 , and the perovskite solar cell serves as a power source or an energy storage unit of the electric device.