应用化学 ›› 2025, Vol. 42 ›› Issue (6): 776-784.DOI: 10.19894/j.issn.1000-0518.250068

• 研究论文 • 上一篇    下一篇

手性配体结构对红光准二维钙钛矿圆偏振电致发光性能的影响

曲跃1,2, 战宏梅2(), 赵晨阳2, 程延祥1,2, 秦川江1,2()   

  1. 1.中国科学技术大学应用化学与工程学院,合肥 230026
    2.中国科学院长春应用化学研究所,高分子科学与技术全国重点实验室,长春 130022
  • 收稿日期:2025-02-22 接受日期:2025-05-07 出版日期:2025-06-01 发布日期:2025-07-01
  • 通讯作者: 战宏梅,秦川江
  • 基金资助:
    吉林省科技发展计划项目(20240101144JC);国家自然科学基金(52203320);吉林省与中国科学院科技合作项目(2023SYHZ0017)

Effect of Chiral Ligand Structure on Red Quasi-2D Perovskites Circularly Polarized Electroluminescence Performance

Yue QU1,2, Hong-Mei ZHAN2(), Chen-Yang ZHAO2, Yan-Xiang CHENG1,2, Chuan-Jiang QIN1,2()   

  1. 1.School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China
    2.State Key Laboratory of Polymer Science and Technology,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2025-02-22 Accepted:2025-05-07 Published:2025-06-01 Online:2025-07-01
  • Contact: Hong-Mei ZHAN,Chuan-Jiang QIN
  • About author:cjqin@ciac.ac.cn
    hmzhan@ciac.ac.cn
  • Supported by:
    Jilin Province Science and Technology Development Plan Project(20240101144JC);the National Natural Science Foundation of China(52203320);the Science and Technology Cooperation Project between Jilin Province and Chinese Academy of Sciences(2023SYHZ0017)

摘要:

圆偏振电致发光二极管(CP-LEDs)在三维显示、生物传感等领域具有广阔应用前景。 然而,基于手性钙钛矿的CP-LEDs研究主要集中在绿光波段,红光器件的开发仍面临挑战。 本文以手性准二维钙钛矿作为发光层材料,通过引入空间位阻不同的2种手性配体R-(+)-α-苯甲基碘化铵(R-MBAI)和R-(+)-β-甲基苯乙基碘化铵(R-MPEAI),系统研究了配体结构对钙钛矿薄膜形貌、光物理性质及器件性能的影响。 结果表明,空间位阻较小的R-MPEAI配体能够有效抑制大n相的生成,优化能量传输过程,并显著降低非辐射复合速率,从而提升光致发光性能。 基于R-MPEAI的器件实现了纯红光发射(641 nm),外部量子效率(EQE)达到7.25%,圆偏振电致发光不对称因子(gEL)为2.86%,实现了基于钙钛矿的纯红光CP-LEDs。 该研究为开发高性能红光CP-LEDs提供了新策略。

关键词: 发光二极管, 手性配体, 圆偏振电致发光, 纯红光

Abstract:

Circularly polarized light-emitting diodes (CP-LEDs) hold significant promise for applications in 3D displays and biosensing, and so on. While chiral perovskite CP-LEDs research has predominantly focused on green emission, the development of red devices remains a challenge. In this study, we utilized chiral quasi-two-dimensional (Quasi-2D) perovskites as emitting materials to investigate the impact of chiral ligand structure on film morphology, photophysical properties, and device performance. By introducing chiral R-MBAI and R-MPEAI ligands with varying steric hindrances, we demonstrated that the R-MPEAI ligand, with smaller steric hindrance, effectively suppresses the formation of large n phases, optimizes energy transfer processes, and reduces the non-radiative recombination rate, leading to enhanced photoluminescence. Consequently, the R-MPEAI-based device achieved pure red emission at 641 nm with a 7.25% external quantum efficiency (EQE) and a 2.86% circularly polarized electroluminescence dissymmetry factor (gEL), realizing perovskite-based pure red CP-LEDs. This work offers a new strategy for developing high-performance red CP-LEDs.

Key words: Light-emitting diodes, Chiral ligands, Circularly polarized electroluminescence, Pure red emission

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