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Halogen substitution effects on optical and electrical properties in 3D molecular perovskites

Author:
ZhaoThese authors contributed equally to the work and should be considered co-first authors., Meng-Meng, Zhou, Lin, Shi, Ping-Ping, Zheng, Xuan, Chen, Xiao-Gang, Gao, Ji-Xing, Geng, Fu-Juan, Ye, Qiong, Fu, Da-Wei
Source:
Chemical communications 2018 v.54 no.94 pp. 13275-13278
ISSN:
1364-548X
Subject:
cadmium, chemical reactions, dielectric properties, halogens, phase transition
Abstract:
Both 3D organic–inorganic perovskites ([Et₃P(CH₂)₂Cl][Cd(dca)₃] (1) and [Et₃P(CH₂)₂F][Cd(dca)₃] (2) [dca = dicyanamide, N(CN)₂⁻]) display two sequentially reversible high-temperature phase transitions and switchable dielectric properties. Through halogen substitution, 1 shows exceptional switching behaviour of second harmonic generation effects and remarkably 2 represents the first above-room-temperature 3D ferroelastic material characterized by two ferroelastic phases.
Agid:
6219384