Yan Shanshan, Wang Kaiyang, Xing Guichuan, Xu Jincheng, Su Shichen, Tang Zikang, Wang Shuangpeng, Ng Kar Wei
Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa 999078, Macau, China.
Institute of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, China.
ACS Appl Mater Interfaces. 2021 Aug 18;13(32):38458-38466. doi: 10.1021/acsami.1c08287. Epub 2021 Aug 4.
Hybrid organic-inorganic lead halide perovskite microwires are potential building blocks for realizing on-chip integrated optoelectronic devices. However, the length-controllable synthesis of one-dimensional hybrid perovskite microwires has been rarely reported, especially the ones with lengths in the millimeter scale. Herein, methylammonium lead bromide (MAPbBr) and formamidinium lead bromide (FAPbBr) micro and milliwires are demonstrated using single-crystal PbBr microwires synthesized via template-free solution-phase growth as the lattice framework. Following the PbBr template, the as-converted perovskite microwires possess controllable lengths ranging from tens to thousands of micrometers. In addition, Fabry-Perot (FP) lasing was realized in both MAPbBr and FAPbBr microwires, attesting to their excellent crystal quality and the efficient optical confinement of the natural cavity. These unique properties result in the first demonstration of FP perovskite microwire lasers with submillimeter lengths. More interestingly, the microwire lasers show excellent photostability under repetitive pulsed laser excitation for over 8 × 10 cycles. Such findings demonstrate that the solution-converted hybrid lead bromide microwires have excellent optoelectronic performances promising for practical applications, and the size controllability indicates that this novel fabrication process may be feasible for large-scale industrial production.
有机-无机杂化卤化铅钙钛矿微线是实现片上集成光电器件的潜在构建模块。然而，一维杂化钙钛矿微线的长度可控合成鲜有报道，尤其是长度在毫米级的微线。在此，以通过无模板溶液相生长合成的单晶PbBr微线作为晶格框架，展示了甲基溴化铅（MAPbBr）和甲脒溴化铅（FAPbBr）的微米和毫米级微线。沿着PbBr模板，转化后的钙钛矿微线具有从几十到数千微米不等的可控长度。此外，在MAPbBr和FAPbBr微线中均实现了法布里-珀罗（FP）激光发射，证明了它们优异的晶体质量和天然腔的有效光学限制。这些独特性能促成了首次展示亚毫米长度的FP钙钛矿微线激光器。更有趣的是，微线激光器在重复脉冲激光激发下超过8×10个循环表现出优异的光稳定性。这些发现表明，溶液转化的杂化溴化铅微线具有优异的光电性能，有望用于实际应用，尺寸可控性表明这种新颖的制造工艺可能适用于大规模工业生产。
