High-performance CH3NH3PbI3 perovskite solar cells fabricated under ambient conditions with high relative humidity. (17th September 2015)

• Record Type: Journal Article
• Authors: Lei, Binglong; Eze, Vincent Obiozo; Mori, Tatsuo
• Is Part Of: Japanese journal of applied physics. Volume 54:Number 10(2015:Oct.)
• Publication Date: 2015-09-17
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.54.100305
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: Hygroscopic perovskite solar cells are commonly fabricated under conditions of inert atmosphere or low relative humidity (RH). To generate high-performance perovskite light-absorbing layers for super power conversion efficiency (PCE), we fabricated CH3 NH3 PbI3 solar cells under ambient conditions (RH = 42–48%) by a flowing gas directly from high-RH air. The primary advantage of this technique, together with the casting of a hot solution and quick conduction, enabled us to achieve the highest and average PCEs of 16.32 and 14.27% respectively, with an extremely small deviation of 0.49%. Our research will be of significance for fabricating highly efficient and reproducible perovskite photovoltaics.