单量子点光谱与激子动力学研究进展  

Research progress of single quantum-dot spectroscopy and exciton dynamics

作　　者：李斌 张国峰[2] 陈瑞云[2] 秦成兵[2] 胡建勇[2] 肖连团[2] 贾锁堂[2] Li Bin;Zhang Guo-Feng;Chen Rui-Yun;Qin Cheng-Bing;Hu Jian-Yong;Xiao Lian-Tuan;Jia Suo-Tang(Key Laboratory of Spectral Measurement and Analysis of Shanxi Province,College of Physics and Information Engineering,Shanxi Normal University,Taiyuan 030031,China;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西师范大学物理与信息工程学院,原子分子和材料光谱测量与分析山西省重点实验室,太原030031 [2]山西大学激光光谱研究所,量子光学与光量子器件国家重点实验室,极端光学协同创新中心,太原030006

出　　处：《物理学报》2022年第6期312-328,共17页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:62127817,62075120,62075122,61875109,91950109,62105193);国家自然科学基金和瑞典科研与教育国际合作基金(批准号:62011530133);山西省基础研究计划(批准号:202103021223254);山西省高等学校科技创新计划(批准号:2021L257);山西省回国留学人员科研资助项目(批准号:HGKY2019002);山西省高等学校中青年拔尖创新人才支持计划资助的课题.

摘　　要：胶体半导体量子点具有宽带吸收、窄带发射、发光量子产率高、发射波长连续可调等优点,是制备发光二极管、太阳能电池、探测器、激光器等光电器件的优质材料.单量子点光谱能够消除系综平均效应,可以在单粒子水平上获取量子点材料的结构和动力学信息及与其他材料间的电荷、能量转移动力学等.相关研究结果能够指引量子点材料的设计和为量子点的相关应用提供机理基础.另外基于单量子点可以开展纳米尺度上光与物质的相互作用研究,制备单光子源和纠缠光子源等.本文综述了单量子点光谱与激子动力学近期的相关研究进展,主要包括单量子点的光致发光闪烁特性和调控方式、单激子和多激子动力学研究及双激子辐射特性的调控等.最后简要地讨论了单量子点光谱未来可能的发展趋势.Colloidal semiconductor quantum dots(QDs)have strong light absorption,continuously adjustable narrowband emission,and high photoluminescence quantum yields,thereby making them promising materials for light-emitting diodes,solar cells,detectors,and lasers.Single-QD photoluminescence spectroscopy can remove the ensemble average to reveal the structure information and exciton dynamics of QD materials at a single-particle level.The study of single-QD spectroscopy can provide guidelines for rationally designing the QDs and giving the mechanism basis for QD-based applications.We can also carry out the research of the interaction between light and single QDs on a nanoscale,and prepare QD-based single-photon sources and entangled photon sources.Here,we review the recent research progress of single-QD photoluminescence spectroscopy and exciton dynamics,mainly including photoluminescence blinking dynamics,and exciton and multi-exciton dynamics of single colloidal CdSe-based QDs and perovskite QDs.Finally,we briefly discuss the possible future development trends of single-QD spectroscopy and exciton dynamics.

关 键 词：单量子点光谱 激子动力学 光致发光闪烁 双激子辐射 

分 类 号：O431.2[机械工程—光学工程]