Strong circularly polarized luminescence from quantum dots/2D chiral perovskites composites

Wang, Qingqian1; Zhu, Hongmei1; Chen, Wei2; Hao, Junjie1; Wang, Zhaojin1; Tang, Jun3; Yang, Yingguo4; Sun, Xiao Wei1; Wu, Dan3; Wang, Kai1

2023

10.1007/s12274-023-5380-0

Nano Research   Impact Factor & Quartile

1998-0124

1998-0000

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 spin-optoelectronics. However, there is a key contradiction that in chiral perovskites chirality distorts the crystal structure, leading to poor photoluminescence (PL) properties. Achieving the balance between chirality and PL is a major challenge for strong CPL from chiral perovskites. Differently, two-dimensional (2D) chiral perovskite has shown fascinating chiral induced spin selectivity (CISS) effect which can act as spin injector under ambient conditions. Here, 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 effect. The as-synthesized QDs/CP composites exhibit dissymmetry factors (g(lum)) up to 9.06 x 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 cations. Besides, time-resolved PL (TR-PL) measurements verify the enhanced CPL activity should be attributed to the charge transport between two components. These findings provide a useful method to achieve CPL in QDs/2D chiral perovskite heterojunctions which could be promising in spin-optoelectronics application.

circularly polarized luminescence colloidal quantum dots two-dimensional (2D) chiral perovskites grazing incident wide angle X-ray scattering (GIWAXS) chiral induced spin selectivity

SCI

English

First ; Corresponding

Guangdong Basic and Applied Basic Research Foundation["2022A1515011071","2019A1515111093","2022A1515011614"] ; National Natural Science Foundation of China["62122034","61875082","61905107","62204107","62205138"] ; Innovation Project of Department of Education of Guangdong Province[2019KTSCX157] ; Shenzhen Innovation Project["JCYJ20210324104413036","JCYJ20190809152411655"] ; China Postdoctoral Science Foundation["2021M691397","2021M691411"]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000921255300004

TSINGHUA UNIV PRESS

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Shenzhen Technol Univ, Coll Engn Phys, Shenzhen 518118, Peoples R China
3.Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518118, Peoples R China
4.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

Wang, Qingqian,Zhu, Hongmei,Chen, Wei,et al. Strong circularly polarized luminescence from quantum dots/2D chiral perovskites composites[J]. Nano Research,2023.

Wang, Qingqian.,Zhu, Hongmei.,Chen, Wei.,Hao, Junjie.,Wang, Zhaojin.,...&Wang, Kai.(2023).Strong circularly polarized luminescence from quantum dots/2D chiral perovskites composites.Nano Research.

Wang, Qingqian,et al."Strong circularly polarized luminescence from quantum dots/2D chiral perovskites composites".Nano Research (2023).