双折射
材料科学
极化(电化学)
光电子学
光学
钙钛矿(结构)
化学
结晶学
物理
物理化学
作者
Ziyi Wang,Chang Xu,Yipeng Song,Zhengyin Du,Yang Zhou,Minjuan Li,Weiqi Huang,Qian-Ting Xu,Yanqiang Li,Sangen Zhao,Junhua Luo
标识
DOI:10.1002/anie.202311086
摘要
Birefringent crystals that can switch light polarization have important applications in optoelectronics. In the last decades, birefringence is mostly optimized by chemical strategies. Recently, switching birefringence by physical means has attracted much attention. Here, this work reports the observation of heat switching birefringence in a 2D layered hybrid halide perovskite (C2 N3 H4 )2 PbCl4 ((C2 N3 H4 )+ =1,2,4-triazolium). This heat switching birefringence leads to a significant change in the interference color for the crystal plate under the illumination of orthogonal polarized light. Structure analyses reveal a heat dependent structure transition in (C2 N3 H4 )2 PbCl4 , whose birefringence is switched by the change in the distortion degree of PbCl6 octahedron. This discovery may be beneficial to the further development of stimuli-responsive polarization optical devices.
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