基于钙钛矿纳米晶体的复合材料微球发光特性的研究  

Study on the luminous characteristics of the composites microsphere based on perovskite nanocrystal

作　　者：范成 徐公杰[1] 蔡斌[1] FAN Cheng;XU Gongjie;CAI Bin(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2020年第6期42-48,共7页Optical Instruments

基　　金：国家自然科学基金(青年基金)(61306118)。

摘　　要：为了拓展钙钛矿纳米晶体在激光领域的应用,利用低成本、易合成的溶剂−非溶剂法,将实验合成的CsPbBr3纳米晶体封装或附着于高分子材料环烯烃聚合物(COP)以形成高稳定性的复合材料体系,进一步制备成微球,形成回音壁模式(WGM)谐振腔。借助于微球的WGM谐振腔,表面附着的纳米晶体的荧光会在微球内发生谐振,形成被动式的WGM谐振腔,形成激光,其阈值为28.5μJ/cm2,品质因数Q为835。这种复合材料体系的微球为钙钛矿纳米晶体在高稳定性的激光器件、非线性系统及光动力学研究提供了一个有效平台。In order to expand the application in laser area of the perovskite nanocrystals,the CsPbBr3 perovskite nanocrystals were encapsulated into cyclo olefin polymer(COP)to form highly stable composite.Furthermore,the composite microspheres were prepared successfully via the lowcost and easy synthesis solvent-antisolvent method,which can form a whispering-gallery mode(WGM)resonator and benefit for lasing process.We achieved a microsphere laser with a threshold of 28.5μJ/cm2 and a Q value of 835.These microspheres of composite material could provide an efficient platform for robust laser devices,nonlinear systems,and optical dynamics studies.

关 键 词：钙钛矿纳米晶体 环烯烃聚合物 溶剂—非溶剂法 回音壁模式(WGM) 

分 类 号：O432.12[机械工程—光学工程]