Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes,Journal of the American Chemical Society

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Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2022-05-15 , DOI: 10.1021/jacs.2c01214
Chuying Ye ₁ , Jiawei Jiang ₂ , Shaolan Zou ₁ , Wenbo Mi ₂ , Yin Xiao ₁

Affiliation

We developed type-II core–shell nanocrystals (NCs) with a chiral low-dimensional perovskite shell and an achiral 3D MAPbBr₃ core. The core–shell NCs exhibit spin-polarized luminescence at the first excitation band of the achiral core, which is due to the chiral-induced spin selectivity (CISS) effect-governed spin-dependent shell-to-core electron transportation and the subsequent electron–hole recombination in the core. The preferred spin state of the transferred electrons is determined by the handness of the chiral shell. For the core–shell NCs film, a photoluminescence quantum yield (PLQY) of 54% and a circularly polarized luminescence (CPL) with a maximum |g_lum| of 4.0 × 10^–3 are obtained at room temperature. Finally, we achieved a spin-polarized light-emitting diode (spin-LED), affording a circularly polarized electroluminescence (CP-EL) with a |g_CP-EL|of 6.0 × 10^–3 under ambient conditions.

中文翻译：

用于室温自旋发光二极管的具有手性诱导自旋选择性的核壳三维钙钛矿纳米晶体

我们开发了具有手性低维钙钛矿壳和非手性 3D MAPbBr ₃核的 II 型核壳纳米晶体 (NC)。核壳 NC 在非手性核的第一个激发带处表现出自旋极化发光，这是由于手性诱导自旋选择性 (CISS) 效应控制的自旋相关的壳到核电子传输和随后的电子– 核心中的空穴重组。转移电子的优选自旋态由手性壳的手性决定。对于核壳 NCs 薄膜，54% 的光致发光量子产率 (PLQY) 和最大的圆偏振发光 (CPL) | 克拉姆| _{_}4.0 × 10 ^–3在室温下获得。最后，我们实现了自旋偏振发光二极管 (spin-LED)，提供了圆偏振电致发光 (CP-EL)，具有 | g _CP-EL |在环境条件下为 6.0 × 10 ^{–3 。}

更新日期：2022-05-15

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