材料科学
二次谐波产生
光电子学
钙钛矿(结构)
结晶度
微晶
卤化物
各向异性
纳米技术
光学
结晶学
复合材料
无机化学
激光器
化学
物理
冶金
作者
Ziwei Yu,Shougen Cao,Yingjie Zhao,Yangwu Guo,Meiqiu Dong,Yue Fu,Jinjin Zhao,Jingrun Yang,Lei Jiang,Yuchen Wu
标识
DOI:10.1021/acsami.2c06856
摘要
Halide double perovskites present a new branch for versatile optoelectronic devices because of their huge structural compatibility and environmental friendliness, whereas nonlinear optics (NLO) devices remain blank for this fascinating family. Simultaneously, the precise patterning of single-crystalline perovskite microwire arrays remains a challenge for the integration of NLO devices. Herein, we designed lead-free chiral 2D double perovskites with the nonsymmetrical structure presenting second-harmonic generation (SHG). Furthermore, perovskite single-crystalline arrays with regulated geometry, pure orientation, and high crystallinity are prepared using the capillary-bridge confined assembly technique. The efficient SHG originates from the asymmetric crystal structure and high crystallinity of the microwire arrays. Compared with their polycrystalline thin-film counterparts, linearly polarized SHG and a higher SHG conversion efficiency are demonstrated based on microwire arrays. The results not only expand the applications of lead-free double perovskites in the NLO-integrated fields but also provide a viable way for lead-free optoelectronic devices.
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