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<p>Stimuli-responsive circularly polarized luminescence (CPL) materials have emerged as a powerful platform for investigating excited-state chirality and advancing optoelectronic applications. However, achieving comprehensive modulation of chiroptical properties within a single system under a single external stimulus remains a significant challenge. Here, electric-field-responsive helical ferroelectric liquid crystals are developed by incorporating diverse chiral emitter dopants into the prototypical liquid crystal mesogen 2,3′,4′,5′-tetrafluoro-[1,1′-biphenyl]-4-yl 2,6-difluoro-4-(5-propyl-1,3-dioxan-2-yl) benzoate (DIO), known for its high dielectric anisotropy and multiple mesophases. By co-doping different types of chiral molecules with opposite handedness, a competitive chiral field is generated that responds differentially to the applied voltage, enabling continuous modulation of the helical pitch and reversible inversion of handedness. This work provides the integrated demonstration of single-stimulus regulation of on/off gating, magnitude tuning, and reversible sign inversion in a single liquid-crystal system, opening a pathway toward intelligent chiroptical materials.</p>

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Single-stimulus modulation of multimodal circularly polarized luminescence in helical ferroelectric liquid crystals

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Yongzhi Zhou,
  • Xuefeng Yang,
  • Honghan Ji,
  • Zhi-Wang Luo,
  • Yafei Wang,
  • Pengfei Duan

摘要

Stimuli-responsive circularly polarized luminescence (CPL) materials have emerged as a powerful platform for investigating excited-state chirality and advancing optoelectronic applications. However, achieving comprehensive modulation of chiroptical properties within a single system under a single external stimulus remains a significant challenge. Here, electric-field-responsive helical ferroelectric liquid crystals are developed by incorporating diverse chiral emitter dopants into the prototypical liquid crystal mesogen 2,3′,4′,5′-tetrafluoro-[1,1′-biphenyl]-4-yl 2,6-difluoro-4-(5-propyl-1,3-dioxan-2-yl) benzoate (DIO), known for its high dielectric anisotropy and multiple mesophases. By co-doping different types of chiral molecules with opposite handedness, a competitive chiral field is generated that responds differentially to the applied voltage, enabling continuous modulation of the helical pitch and reversible inversion of handedness. This work provides the integrated demonstration of single-stimulus regulation of on/off gating, magnitude tuning, and reversible sign inversion in a single liquid-crystal system, opening a pathway toward intelligent chiroptical materials.