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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.5 P.710-715


Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride

Author(s):  Xiao-wei PAN, Gang WU, Mang WANG, Hong-zheng CHEN

Affiliation(s):  State Key Lab of Silicon Materials, MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   wmang@zju.edu.cn

Key Words:  Photochromic behavior, Perovskite, Organic-inorganic hybrid

Xiao-wei PAN, Gang WU, Mang WANG, Hong-zheng CHEN. Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride[J]. Journal of Zhejiang University Science A, 2009, 10(5): 710-715.

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%A Hong-zheng CHEN
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0820736

T1 - Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride
A1 - Xiao-wei PAN
A1 - Gang WU
A1 - Mang WANG
A1 - Hong-zheng CHEN
J0 - Journal of Zhejiang University Science A
VL - 10
IS - 5
SP - 710
EP - 715
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0820736

We report that the ultraviolet (UV) light induced photochromic behavior of layered organic-inorganic perovskite material of (C4H9NH3)2CuCl4, changed from yellow to brown after irradiation with UV light (10 mW/cm2) and partially recovered through storage in the dark. (C4H9NH3)2CuCl4 exhibited two distinct absorption bands centered at 286 nm (band I) and 384 nm (band II), which were attributed to the photo-induced exciton formed in 2D inorganic layers sandwiched by organic layers. The blue shift of band I from 287 to 269 nm as well as the decrease of the intensity of band I and band II could be found when samples were irradiated under UV light for different length of time. The simultaneous weakening of the intensity of the N−H···Cl hydrogen bond as well as the vibration of the long Cu−Cl bond in the distorted CuCl64− octahedron could be detected from the Fourier transform infrared (FTIR) spectra, which resulted the change of charge distribution of the dissymmetric Cl−Cu···Cl bond and the resulting photochromic behavior.

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