1. Pseudohalide-Induced Moisture Tolerance in Perovskite CH3NH3Pb(SCN)2I Thin Films.
- Author
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Jiang, Qinglong, Rebollar, Dominic, Gong, Jue, Piacentino, Elettra L., Zheng, Chong, and Xu, Tao
- Subjects
THIOCYANATES ,IODIDES ,PSEUDOHALIDES ,FUNCTIONAL groups ,PEROVSKITE ,SOLAR cells ,HUMIDITY ,THIN films - Abstract
Two pseudohalide thiocyanate ions (SCN
โ ) have been used to replace two iodides in CH3 NH3 PbI3 , and the resulting perovskite material was used as the active material in solar cells. In accelerated stability tests, the CH3 NH3 Pb(SCN)2 I perovskite films were shown to be superior to the conventional CH3 NH3 PbI3 films as no significant degradation was observed after the film had been exposed to air with a relative humidity of 95 % for over four hours, whereas CH3 NH3 PbI3 films degraded in less than 1.5 hours. Solar cells based on CH3 NH3 Pb(SCN)2 I thin films exhibited an efficiency of 8.3 %, which is comparable to that of CH3 NH3 PbI3 based cells fabricated in the same way. [ABSTRACT FROM AUTHOR]- Published
- 2015
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