Circularly polarized luminescent liquid crystal materials with aggregation-induced emission functionality

ZHANG Mao-xin; QIAO Shi-yi; ZHANG Ao; FANG Yi; LIAO Rui-juan; ZHANG Chun-xiu; YU Hai-feng

doi:10.37188/CJLCD.2023-0224

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Circularly polarized luminescent liquid crystal materials with aggregation-induced emission functionality

Material Physics | 更新时间：2023-10-10

- Circularly polarized luminescent liquid crystal materials with aggregation-induced emission functionality
- Chinese Journal of Liquid Crystals and Displays Vol. 38, Issue 10, Pages: 1305-1321(2023)
- 作者机构：
  
  1.北京印刷学院印刷与包装工程学院，北京 102600
  2.北京大学材料科学与工程学院，北京 100871
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(92156011);Natural Science Foundation of Beijing, China(2222055);The Ministry of Education Key Laboratory of Luminescence and Optical Information, Open Project(KLLI0BJTUKF2204);Beijing Municipal Education Commission’s Science and Technology Program General Project(KM201910015010;KM202110015009);BIGC Project(Ec202206;Ee202203;Eb202201;21090123007)
- DOI：10.37188/CJLCD.2023-0224
  CLC：
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ZHANG Mao-xin, QIAO Shi-yi, ZHANG Ao, et al. Circularly polarized luminescent liquid crystal materials with aggregation-induced emission functionality. [J]. Chinese Journal of Liquid Crystals and Displays 38(10):1305-1321(2023)
DOI：

ZHANG Mao-xin, QIAO Shi-yi, ZHANG Ao, et al. Circularly polarized luminescent liquid crystal materials with aggregation-induced emission functionality. [J]. Chinese Journal of Liquid Crystals and Displays 38(10):1305-1321(2023) DOI： 10.37188/CJLCD.2023-0224.

摘要

圆偏振光是光矢量端点轨迹为圆的光，它在传播时光矢量的大小不变而振动方向随相位而改变。通常，非偏振光首先通过偏振片转化为线偏振光，再通过,λ,/4波片分解为左旋或右旋圆偏振光。这一物理过程所获得的圆偏振光能量损耗一般超过50%。而通过构筑聚集诱导发光手性液晶分子直接获得圆偏振光，可以获得高的荧光量子效率和大的不对称因子，有效降低了能量损耗。因此，聚集诱导发光手性液晶受到了研究人员的广泛关注。本文基于聚集诱导发光基团修饰手性液晶分子的设计与合成，以及手性聚集诱导发光分子体系掺杂向列相液晶这两类方法，综述了本领域的研究进展，讨论了聚集诱导发光液晶分子结构设计和聚集态的形成对圆偏振发光和聚集诱导发光性能的影响，展望了这种新型光学材料所面临的机遇和挑战。

Abstract

Circularly polarized light is a type of light in which the endpoint trajectory of the light vector forms a circle. During its propagation， the magnitude of the light vector remains constant while the vibration direction changes along with phase. Typically， unpolarized light is first converted to linearly polarized light through a polarizer and then transformed into left-handed or right-handed circularly polarized light using a quarter-wave plate. However， this physical process results in an energy loss higher than 50% for circularly polarized light. By introducing aggregation-induced emission （AIE） properties into chiral liquid crystal molecules， circularly polarized light can be directly obtained with a high fluorescence quantum efficiency and a large asymmetric factor， thereby achieving effective reduction of energy loss. Consequently， AIE chiral liquid crystals have gained increasing attention from researchers in relevant fields. This review summarizes the recent progress in this field， focusing on the design and synthesis of chiral liquid crystal molecules modified with AIE luminophores and the doping of chiral AIE molecule systems into nematic liquid crystal phases. The influence of the chemical structure design of AIE liquid crystal molecules and the formation of aggregates on circularly polarized luminescence and AIE performance are discussed. Finally， the existing challenges and opportunities for this new optical material are prospected.

关键词

聚集诱导圆偏振发光液晶材料手性液晶基团不对称因子荧光量子效率

Keywords

aggregation-induced circularly polarized luminescent liquid crystalschiral liquid crystal groupsdissymmetry factorfluorescence quantum yield

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