Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-06-01

Journal: MATERIALS

Included Journals: SCIE、EI

Volume: 7

Issue: 6

Page Number: 4789-4802

ISSN: 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.