Solution-processed spin organic light-emitting diodes based on antisolvent-treated 2D chiral perovskites with strong spin-dependent carrier transport.

IF 12.2 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Horizons Pub Date : 2024-12-12 DOI:10.1039/d4mh01371a

Lan-Sheng Yang, Chun-Yao Huang, Chin-An Hsu, Sih-Tong Lin, Yun-Shan Hsu, Chia-Hsiang Chuang, Pei-Hsuan Lo, Yu-Chiang Chao

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Abstract

Chiral perovskites, which are applied to spin organic light-emitting diodes as a spin-induced spin selectivity (CISS) layer, have attracted increasing amounts of attention. A device based on a thicker perovskite CISS layer leads to strongly spin-polarized EL emission. However, chiral perovskite films suffer from poor device performance due to difficulties in carrier injection and film quality. The effects of antisolvent dripping on the chiroptical properties of chiral perovskite films were investigated. The rapid crystallization of chlorobenzene (CB)-treated films generated a high-quality film with fewer halide vacancies and a much greater strength of asymmetric hydrogen bonding. Accordingly, the inorganic structural distortion is greater, resulting in greater chiroptical activity. The chiral perovskite thickness affects the circularly polarized electroluminescence (CP-EL) of spin-OLEDs. The statistics relating device performance and thickness are presented. The spin current polarization degree of chiral perovskites reaches approximately 86%. The maximum CP-EL asymmetry factor (g CP-EL) is 2.6 × 10^-2 and maximum external quantum efficiency (EQE) of the spin-OLED device is 3.68%. Spin OLED devices based on chiral perovskites can be manipulated and controlled by thickness and antisolvent treatment. g_CPEL intensities for devices based on CB-treated chiral perovskite films can be increased by about 1.75 times compared with devices based on untreated films.

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具有强自旋相关载流子输运的抗溶剂处理二维手性钙钛矿溶液处理自旋有机发光二极管。

手性钙钛矿作为自旋诱导自旋选择性（CISS）层应用于自旋有机发光二极管，引起了越来越多的关注。基于较厚的钙钛矿CISS层的器件可以产生强自旋极化的EL发射。然而，手性钙钛矿薄膜由于载流子注入和薄膜质量困难，器件性能较差。研究了抗溶剂滴入对手性钙钛矿薄膜热学性能的影响。氯苯（CB）处理薄膜的快速结晶产生了高质量的薄膜，具有更少的卤化物空位和更大的不对称氢键强度。因此，无机结构扭曲更大，导致更大的热带活动。手性钙钛矿厚度影响自旋发光二极管的圆极化电致发光性能。给出了有关器件性能和厚度的统计数据。手性钙钛矿的自旋电流极化度约为86%。自旋oled器件的最大CP-EL不对称系数（g CP-EL）为2.6 × 10-2，最大外量子效率（EQE）为3.68%。基于手性钙钛矿的自旋OLED器件可以通过厚度和抗溶剂处理进行操作和控制。基于cb处理的手性钙钛矿薄膜的器件的gCPEL强度比基于未处理薄膜的器件可提高约1.75倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.