Dehydration Induced a Structural Transformation into a One-Dimensional Hybrid Perovskite with Second Harmonic Generation and Dual Dielectric Switching
Xiu‐Ni Hua, Zhuoer Cai, Xian Shi, Xiang Zhang, Yinan Zhang, Jian Chen, Ping‐Ping Shi, Hai‐Bao Duan
Abstract
Hybrid organic–inorganic perovskites with structural transformation have garnered continued interest in recent years for their potential as multifunctional materials in the field of optoelectronics and smart devices. Herein, we report a novel hybrid organic–inorganic halide, [C 5 NOH 12 ] 2 [Cd 1.5 Cl 5 (H 2 O)] ( 1 ). Remarkably, the centrosymmetric compound 1 undergoes a structural transformation to a novel noncentrosymmetric hybrid perovskite [C 5 NOH 12 ][CdCl 3 ] ( 2 ) after dehydration. Accompanied by the chemical bond cleavage and reorganization, the zero-dimensional (0D) trinuclear cluster in compound 1 transforms into an intriguing one-dimensional (1D) hexagonal perovskite structure in compound 2, generating multiple optoelectronic switching behaviors. It is worth mentioning that compound 2 demonstrates successive structural phase transitions at 353 and 405 K, resulting in switchable second harmonic generation (SHG) and a dual dielectric response. In addition, compounds 1 and 2 both feature blue-light luminescence, with respective photoluminescence lifetimes of 0.73 and 1.42 ns. This work will offer a pioneering approach and expansive potential for the preparation and development of hybrid organic–inorganic perovskite materials with superior properties.