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Indexed by:期刊论文

Date of Publication:2014-06-01

Journal:MATERIALS

Included Journals:EI、SCIE

Volume:7

Issue:6

Page Number:4789-4802

ISSN No.:1996-1944

Key Words:organic-inorganic hybrid perovskites; photostability

Abstract:We analyze the behavior of a series of newly synthesized (R-NH3)(2)PbX4 perovskites and, in particular, discuss the possible reasons which cause their degradation under UV illumination. Experimental results show that the degradation process depends a lot on their molecular components: not only the inorganic part, but also the chemical structure of the organic moieties play an important role in bleaching and photo-chemical reaction processes which tend to destroy perovskites luminescent framework. In addition, we find the spatial arrangement in crystal also influences the photostability course. Following these trends, we propose a plausible mechanism for the photodegradation of the films, and also introduced options for optimized stability.