Strong circularly polarized luminescence from quantum dots/2D chiral perovskites composites
作者机构：Department of Electrical and Electronic EngineeringSouthern University of Science and TechnologyShenzhen 518055China College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China College of New Materials and New EnergiesShenzhen Technology UniversityShenzhen 518118China Shanghai Advanced Research InstituteChinese Academy of ScienceShanghai 201210China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第5期
页 面：7593-7599页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 070303[理学-有机化学] 0703[理学-化学] 0702[理学-物理学]
基 金：Guangdong Basic and Applied Basic Research Foundation(Nos.2022A1515011071,2019A1515111093,and 2022A1515011614) the National Natural Science Foundation of China(Nos.62122034,61875082,61905107,62204107,and 62205138) Innovation Project of Department of Education of Guangdong Province(No.2019KTSCX157) Shenzhen Innovation Project(Nos.JCYJ20210324104413036 and JCYJ20190809152411655) Q.Q.W.and H.M.Z.acknowledge the support from China Postdoctoral Science Foundation(Nos.2021M691397 and 2021M691411)
主 题：circularly polarized luminescence colloidal quantum dots two-dimensional(2D)chiral perovskites grazing incident wide angle X-ray scattering(GIWAXS) chiral induced spin selectivity
摘 要：Chiral perovskites(CPs)have attracted enormous attentions since they have combined chirality and optoelectrical properties well which is promising in circularly polarized luminescence(CPL)application and of great importance for future ***,there is a key contradiction that in chiral perovskites chirality distorts the crystal structure,leading to poor photoluminescence(PL)*** the balance between chirality and PL is a major challenge for strong CPL from chiral ***,two-dimensional(2D)chiral perovskite has shown fascinating chiral induced spin selectivity(CISS)effect which can act as spin injector under ambient ***,we propose an effective strategy to achieve high CPL activity generated from quantum dots(QDs)by introducing 2D chiral perovskite as a chiral source,providing spin polarized carriers through the CISS *** as-synthesized QDs/CP composites exhibit dissymmetry factors(glum)up to 9.06×10^(−3).For the first time,we performed grazing incident wide angle X-ray scattering(GIWAXS)measurements,showing the chirality originates from the distorted lattices caused by the large chiral organic ***,time-resolved PL(TR-PL)measurements verify the enhanced CPL activity should be attributed to the charge transport between two *** findings provide a useful method to achieve CPL in QDs/2D chiral perovskite heterojunctions which could be promising in spinoptoelectronics application.
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