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<p>Stable organic radicals with unique luminescence have demonstrated great importance in photoelectromagnetic materials and have found broad applicability in the field of organic light-emitting diode (OLEDs). Aiming to further extend their application into chiral optoelectronic devices, by employing topologically chiral [2]catenane as the key chiral skeleton, this work presents the first successful construction of circularly polarized OLEDs (CP-OLEDs) based on donor–acceptor (D–A<sup>•</sup>) type neutral tris(2,4,6-trichlorophenyl)methyl (TTM) radicals. Remarkably, the topologically chiral skeleton, in combination with its controllable dynamic features, enables the system to exhibit a luminescence dissymmetry factor (|<i>g</i><sub>PL</sub>|) value as high as 7.1 × 10<sup>-3</sup>, as well as reversible circularly polarized luminescence (CPL) on/off switching in film state. Importantly, the resulting CP-OLEDs exhibit deep red emission, a maximum external quantum efficiency (EQE<sub>max</sub>) of 3.92%, and a |<i>g</i><sub>EL</sub>| value of 7.2 × 10<sup>-3</sup>. These findings demonstrate the successful development of not only luminescent radicals with unique switchable CPL performances, but also the first CP-OLEDs with promising device performance based on topologically chiral radical emitter, providing a distinctive design principle and a versatile platform for the creation of next-generation smart CP-OLEDs.</p>

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Circularly polarized electroluminescence from topologically chiral [2]catenane-based neutral radicals with tunable deep-red emission

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月30日

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  • Yu Wang,
  • Xiao-Qin Xu,
  • Zhiwen Gao,
  • Xue Li,
  • Yiming Yang,
  • Wen-Long Zhao,
  • Meng Li,
  • Wei Wang,
  • Chuan-Feng Chen,
  • Hai-Bo Yang

摘要

Stable organic radicals with unique luminescence have demonstrated great importance in photoelectromagnetic materials and have found broad applicability in the field of organic light-emitting diode (OLEDs). Aiming to further extend their application into chiral optoelectronic devices, by employing topologically chiral [2]catenane as the key chiral skeleton, this work presents the first successful construction of circularly polarized OLEDs (CP-OLEDs) based on donor–acceptor (D–A•) type neutral tris(2,4,6-trichlorophenyl)methyl (TTM) radicals. Remarkably, the topologically chiral skeleton, in combination with its controllable dynamic features, enables the system to exhibit a luminescence dissymmetry factor (|gPL|) value as high as 7.1 × 10-3, as well as reversible circularly polarized luminescence (CPL) on/off switching in film state. Importantly, the resulting CP-OLEDs exhibit deep red emission, a maximum external quantum efficiency (EQEmax) of 3.92%, and a |gEL| value of 7.2 × 10-3. These findings demonstrate the successful development of not only luminescent radicals with unique switchable CPL performances, but also the first CP-OLEDs with promising device performance based on topologically chiral radical emitter, providing a distinctive design principle and a versatile platform for the creation of next-generation smart CP-OLEDs.