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<p>Chiral phosphorescent manganese (Mn(II)) complexes hold application promise in circularly polarized organic light-emitting diodes (CP-OLEDs) and three-dimensional (3D) display technologies due to their CP luminescence properties, but that simultaneously exhibit both high dissymmetry factors (<i>g</i><sub>PL</sub>) and photoluminescence quantum yields (PLQYs) remain rare. In this study, we report planar chiral Mn(II) enantiomers, <i>R/S</i>-<b>PhCyPO-MnBr</b><sub><b>2</b></sub> and <i>R/S</i>-<b>DPhPO-MnBr</b><sub><b>2</b></sub>, based on [2.2]paracyclophane phosphine oxide ligands, which demonstrate green photoluminescence with high PLQYs of 90% and 88%, and high |gPL| values of 4.2 × 10<sup>−3</sup> and 4.0 × 10<sup>−3</sup>, respectively. Notably, the <b>PhCyPO-MnBr</b><sub><b>2</b></sub>-based OLED achieves a record-high maximum external quantum efficiency of 16.0% among those with Mn(II) complexes. Furthermore, CP-OLEDs incorporating these enantiomers exhibit electroluminescence peaking at 518 and 527 nm, with |<i>g</i><sub>EL</sub>| factors of 4.5 × 10<sup>−3</sup> and 4.3 × 10<sup>−3</sup>, respectively. This study provides a novel approach for the design of chiral Mn(II) complexes for high-performance CP-OLEDs.</p>

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Planar chiral manganese(II) complexes emitters for efficient circularly polarized electroluminescence

  • 期刊论文

  • 发表日期：

    2025年7月22日

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  • Zhong-Zhong Huo,
  • Xian-Fang Hong,
  • Yu Wang,
  • Xiao-Sheng Zhong,
  • Xiong Xiao,
  • Li Yuan,
  • Yong-Hui Zhou,
  • You-Xuan Zheng

摘要

Chiral phosphorescent manganese (Mn(II)) complexes hold application promise in circularly polarized organic light-emitting diodes (CP-OLEDs) and three-dimensional (3D) display technologies due to their CP luminescence properties, but that simultaneously exhibit both high dissymmetry factors (gPL) and photoluminescence quantum yields (PLQYs) remain rare. In this study, we report planar chiral Mn(II) enantiomers, R/S-PhCyPO-MnBr2 and R/S-DPhPO-MnBr2, based on [2.2]paracyclophane phosphine oxide ligands, which demonstrate green photoluminescence with high PLQYs of 90% and 88%, and high |gPL| values of 4.2 × 10−3 and 4.0 × 10−3, respectively. Notably, the PhCyPO-MnBr2-based OLED achieves a record-high maximum external quantum efficiency of 16.0% among those with Mn(II) complexes. Furthermore, CP-OLEDs incorporating these enantiomers exhibit electroluminescence peaking at 518 and 527 nm, with |gEL| factors of 4.5 × 10−3 and 4.3 × 10−3, respectively. This study provides a novel approach for the design of chiral Mn(II) complexes for high-performance CP-OLEDs.