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Vertical recrystallization for highly efficient and stable formamidinium-based inverted-structure perovskite solar cells
| Content Provider | Semantic Scholar |
|---|---|
| Author | Xie, Fengxian Chen, Chun-Chao Wu, Yongzhen Li, Xing Cai, Molang Liu, Xiao Yang, Xudong Han, Liyuan |
| Copyright Year | 2017 |
| Abstract | Formamidinium (FA)-based perovskite materials show an extended absorption spectrum to 840 nm, which enables high power conversion efficiencies of over 20% compared with normal-structure perovskite solar cells (PSCs). However, it is rarely possible to obtain high performance in inverted-structure PSCs owing to the unbalanced electron–hole transport properties. To achieve desirable electronic qualities in a FA perovskite film, it is necessary to substantially improve the crystallinity of the perovskite films. A new perovskite growth method is presented here using methylammonium chloride (MACl) to assist vertical recrystallization in a formamidinium perovskite film. The obtained film consists of highly crystallized vertically-orientated grains, which minimize the vertical grain boundary and trap site in the films, and later contribute to a power conversion efficiency above 20% in inverted-structure PSCs. Most importantly, the highly crystalline, phase-pure morphology and low MA content in formamidinium perovskite films can contribute to the light-soaking stability and thermal stability up to 500 h in solar-cell devices. |
| Starting Page | 1942 |
| Ending Page | 1949 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C7EE01675A |
| Volume Number | 10 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c7/ee/c7ee01675a/c7ee01675a1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C7EE01675A |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
