期刊
NANO RESEARCH
卷 16, 期 5, 页码 7593-7599出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-023-5380-0
关键词
circularly polarized luminescence; colloidal quantum dots; two-dimensional (2D) chiral perovskites; grazing incident wide angle X-ray scattering (GIWAXS); chiral induced spin selectivity
This study proposes an effective strategy to achieve high CPL activity in quantum dots 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). These findings provide a useful method to achieve CPL in QDs/2D chiral perovskite heterojunctions, which could be promising in spin-optoelectronics application.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据