| Title |
Engineering fluorinated-cation containing inverted perovskite solar cells with an efficiency of >21% and improved stability towards humidity / |
| Authors |
Wang, Xiao ; Rakstys, Kasparas ; Jack, Kevin ; Jin, Hui ; Lai, Jonathan ; Li, Hui ; Ranasinghe, Chandana Sampath Kumara ; Saghaei, Jaber ; Zhang, Guanran ; Burn, Paul L ; Gentle, Ian R ; Shaw, Paul E |
| DOI |
10.1038/s41467-020-20272-3 |
| Full Text |
|
| Is Part of |
Nature communications.. berlin : Nature Portfolio. 2021, vol. 12, iss. 1, art. no. 52, p. 1-10.. ISSN 2041-1723 |
| Abstract [eng] |
Efficient and stable perovskite solar cells with a simple active layer are desirable for manufacturing. Three-dimensional perovskite solar cells are most efficient but need to have improved environmental stability. Inclusion of larger ammonium salts has led to a trade-off between improved stability and efficiency, which is attributed to the perovskite films containing a two-dimensional component. Here, we show that addition of 0.3 mole percent of a fluorinated lead salt into the three-dimensional methylammonium lead iodide perovskite enables low temperature fabrication of simple inverted solar cells with a maximum power conversion efficiency of 21.1%. The perovskite layer has no detectable two-dimensional component at salt concentrations of up to 5 mole percent. The high concentration of fluorinated material found at the film-air interface provides greater hydrophobicity, increased size and orientation of the surface perovskite crystals, and unencapsulated devices with increased stability to high humidity. |
| Published |
berlin : Nature Portfolio |
| Type |
Journal article |
| Language |
English |
| Publication date |
2021 |
| CC license |
|
