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https://doi.org/10.21256/zhaw-20649| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells |
| Authors: | Lu, Haizhou Liu, Yuhang Ahlawat, Paramvir Mishra, Aditya Tress, Wolfgang Eickemeyer, Felix T Yang, Yingguo Fu, Fan Wang, Zaiwei Avalos, Claudia E Carlsen, Brian I Agarwalla, Anand Zhang, Xin Li, Xiaoguo Zhan, Yiqiang Zakeeruddin, Shaik M Emsley, Lyndon Rothlisberger, Ursula Zheng, Lirong Hagfeldt, Anders Grätzel, Michael |
| et. al: | No |
| DOI: | 10.1126/science.abb8985 10.21256/zhaw-20649 |
| Published in: | Science |
| Volume(Issue): | 370 |
| Issue: | 6512 |
| Page(s): | eabb8985 |
| Issue Date: | 2020 |
| Publisher / Ed. Institution: | American Association for the Advancement of Science |
| ISSN: | 0036-8075 1095-9203 |
| Language: | English |
| Subject (DDC): | |
| Abstract: | Mixtures of cations or halides with FAPbI3 (where FA is formamidinium) lead to high efficiency in perovskite solar cells (PSCs) but also to blue-shifted absorption and long-term stability issues caused by loss of volatile methylammonium (MA) and phase segregation. We report a deposition method using MA thiocyanate (MASCN) or FASCN vapor treatment to convert yellow δ-FAPbI3 perovskite films to the desired pure α-phase. NMR quantifies MA incorporation into the framework. Molecular dynamics simulations show that SCN- anions promote the formation and stabilization of α-FAPbI3 below the thermodynamic phase-transition temperature. We used these low-defect-density α-FAPbI3 films to make PSCs with >23% power-conversion efficiency and long-term operational and thermal stability, as well as a low (330 millivolts) open-circuit voltage loss and a low (0.75 volt) turn-on voltage of electroluminescence. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/20649 |
| Fulltext version: | Accepted version |
| License (according to publishing contract): | Licence according to publishing contract |
| Restricted until: | 2021-04-02 |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Computational Physics (ICP) |
| Appears in collections: | Publikationen School of Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2020_Lu-etal_Vapor-assisted-deposition-FAPbI3-perovskite-solar-cells_Science.pdf | Accepted Version | 286.4 kB | Adobe PDF |  View/Open |
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