Light stability tests of methylammonium and formamidinium Pb-halide perovskites for solar cell applications. (28th July 2015)

• Record Type: Journal Article
• Authors: Murugadoss, Govindhasamy; Tanaka, Soichiro; Mizuta, Gai; Kanaya, Shusaku; Nishino, Hitoshi; Umeyama, Tomokazu; Imahori, Hiroshi; Ito, Seigo
• Is Part Of: Japanese journal of applied physics. Volume 54:Number 8(2015:Aug.)Supplement 1
• Publication Date: 2015-07-28
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.54.08KF08
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We have prepared perovskite [CH3 NH3 PbI3 (MALI), CH3 NH3 PbBr3 (MALB), NH2 CH=NH2 PbI3 (FALI), and NH2 CH=NH2 PbBr3 (FALB)] thin films by a one-step process on glass/TiO2 and glass/Al2 O3 substrates and studied the stability of the perovskite under UV/visible light radiation up to 24 h at 1.5AM in air. After irradiation, the films were characterized by UV–vis absorption and X-ray diffraction measurements. In addition, photovoltaic performance characteristics in air were studied using different perovskites before (0 h) and after 24 h irradiation. The results revealed that Al2 O3 protected the perovskite crystal from degradation. However, the perovskites were unstable except for NH2 CH=NH2 PbI3 under the same conditions using a TiO2 scaffold layer.