Vapor-assisted deposition of highly efficient, stable black-phase FAPbI 3 perovskite solar cells

Author:

Lu Haizhou12ORCID,Liu Yuhang2ORCID,Ahlawat Paramvir3ORCID,Mishra Aditya4ORCID,Tress Wolfgang R.1ORCID,Eickemeyer Felix T.2ORCID,Yang Yingguo5ORCID,Fu Fan6ORCID,Wang Zaiwei1ORCID,Avalos Claudia E.4ORCID,Carlsen Brian I.1,Agarwalla Anand1,Zhang Xin7ORCID,Li Xiaoguo7ORCID,Zhan Yiqiang7ORCID,Zakeeruddin Shaik M.2ORCID,Emsley Lyndon4,Rothlisberger Ursula3ORCID,Zheng Lirong7ORCID,Hagfeldt Anders1ORCID,Grätzel Michael2ORCID

Affiliation:

1. Laboratory of Photomolecular Science, Institute of Chemical Sciences Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.

2. Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, EPFL, CH-1015 Lausanne, Switzerland.

3. Laboratory of Computational Chemistry and Biochemistry, Institute of Chemical Sciences and Engineering, EPFL, CH-1015 Lausanne, Switzerland.

4. Laboratory of Magnetic Resonance, Institute of Chemical Sciences and Engineering, EPFL, CH-1015 Lausanne, Switzerland.

5. Shanghai Synchrotron Radiation Facility (SSRF), Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, P. R. China.

6. Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Duebendorf, Switzerland.

7. Centre for Micro Nano Systems, School of Information Science and Technology (SIST), Fudan University, Shanghai 200433, P. R. China.

Abstract

Moving a perovskite into the black The bandgap of the black α-phase FAPbI 3 (where FA is formamidinium) is nearly ideal for solar cells, but it is unstable with respect to the photoinactive yellow δ-phase. Lu et al. found that a film of the yellow phase was converted to a highly crystalline black phase by vapor exposure to methylammonium thiocyanate at 100°C, and it retained this structure after 500 hours at 85°C. Solar cells fabricated with this material had a power conversion efficiency of more than 23%. After 500 hours under maximum power tracking and a period of dark recovery, 94% of the original efficiency was retained. Science , this issue p. eabb8985

Funder

Swiss National Science Foundation

China Postdoctoral Science Foundation

Horizon 2020

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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