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

Authors :: Zhao, 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; 12/7/2018, Vol. 54 Issue 94, p13275-13278, 4p
Publication Year :: 2018
Abstract: Both 3D organic–inorganic perovskites ([Et<subscript>3</subscript>P(CH<subscript>2</subscript>)<subscript>2</subscript>Cl][Cd(dca)<subscript>3</subscript>] (1) and [Et<subscript>3</subscript>P(CH<subscript>2</subscript>)<subscript>2</subscript>F][Cd(dca)<subscript>3</subscript>] (2) [dca = dicyanamide, N(CN)<subscript>2</subscript><superscript>−</superscript>]) 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. [ABSTRACT FROM AUTHOR]

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