第44卷第6期2023年6月Vol.44No.6June,2023发光学报CHINESEJOURNALOFLUMINESCENCE基于大尺寸量子阱结构的多激子复合动力学孟竹1*,徐豪2(1.沈阳理工大学理学院,辽宁沈阳110158;2.沈阳大学科技创新研究院,辽宁沈阳110003)摘要:半导体纳米晶的多激子复合过程在激光器件、发光二极管和光伏等方面具有巨大的应用价值,但粒子体积的减小会加速多激子态的非辐射俄歇复合,这极大地阻碍了相关应用的发展。因此,抑制俄歇复合成为纳米晶体领域一个重要的研究课题。本文基于球形量子阱结构CdS/CdSe/CdS,通过共格应变减小由材料间晶格失配引起的缺陷,制备出高荧光量子产率的大尺寸纳米晶。应用时间分辨荧光光谱技术,在光谱学以及动力学领域研究了大尺寸量子阱的多激子复合特性,分析了单激子及多激子的衰减寿命和谱线特征,并证实了大尺寸量子阱对俄歇复合的抑制作用。本研究有望促进纳米结构在多激子应用中的发展。关键词:大尺寸量子阱;多激子;时间分辨荧光光谱技术;非辐射复合中图分类号:O482.31文献标识码:ADOI:10.37188/CJL.20230002MultiexcitonsRecombinationDynamicsBasedonLarge-scaleQuantumWellStructureMENGZhu1*,XUHao2(1.SchoolofScience,ShenyangLigongUniversity,Shenyang110158,China;2.InstituteofInnovationScienceandTechnology,ShenyangUniversity,Shenyang110003,China)*CorrespondingAuthor,E-mail:1183050408@qq.comAbstract:Colloidalsemiconductornanocrystalspresentuniqueelectronicandopticalproperties.Themultiexci⁃tonsrecombinationprocessofsemiconductornanocrystalshasattractedextensiveattentionmotivatedbytheneedsofprospectiveapplicationsinlasingdevices,light-emittingdiodes,andphotovoltaiccells.However,thereductionofparticlesizewillacceleratethenon-radiativeAugerrecombinationofmultiexcitonsstates,whichsignificantlyhindersthedevelopmentofrelatedapplications.Therefore,suppressingAugerrecombinationhasbecomeanimportantre⁃searchtopicinthenanocrystalfield.IncreasingthevolumeofnanocrystalsisconsideredtobeaneffectivemeanstodecreaseAugerrecombination.Here,wehavesynthesizedasphericalquantumwellstructureCdS/CdSe/CdSbyhotinjectionmethod.Asaresultofcoherentstrain,thissandwichlikestructurecandiminishthestrainontheinterfacewhichiscau...