When quantum dots meet blue phase liquid crystal elastomers:visualized full-color and mechanically-switchable circularly polarized luminescence  

作　　者：Shan Li Yuqi Tang Qingyan Fan Ziyuan Li Xinfang Zhang Jingxia Wang Jinbao Guo Quan Li 

机构地区：[1]Key Laboratory of Carbon Fibers and Functional Polymers,Ministry of Education,and College of Materials Science and Engineering,Beijing University of Chemical Technology,100029,Beijing,China [2]Institute of Advanced Materials and School of Chemistry and Chemical Engineering,Southeast University,Nanjing,211189,China [3]Materials Science Graduate Program,Kent State University,Kent,OH,44242,USA [4]CAS Key Laboratory of Bio-Inspired Materials and Interfacial Sciences,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,100190,Beijing,China

出　　处：《Light(Science & Applications)》2024年第6期1210-1220,共11页光（科学与应用)（英文版）

基　　金：support from the National Natural Science Foundation of China (Grant Nos.52073017 and 51773009)。

摘　　要：Polymer-based circularly polarized luminescence(CPL)materials with the advantage of diversified structure,easy fabrication,high thermal stability,and tunable properties have garnered considerable attention.However,adequate and precise tuning over CPL in polymer-based materials remains challenging due to the difficulty in regulating chiral structures.Herein,visualized full-color CPL is achieved by doping red,green,and blue quantum dots(QDs)into reconfigurable blue phase liquid crystal elastomers(BPLCEs).In contrast to the CPL signal observed in cholesteric liquid crystal elastomers(CLCEs),the chiral 3D cubic superstructure of BPLCEs induces an opposite CPL signal.Notably,this effect is entirely independent of photonic bandgaps(PBGs)and results in a high glum value,even without matching between PBGs and the emission bands of QDs.Meanwhile,the lattice structure of the BPLCEs can be reversibly switched via mechanical stretching force,inducing on-off switching of the CPL signals,and these variations can be further fixed using dynamic disulfide bonds in the BPLCEs.Moreover,the smart polymer-based CPL systems using the BPLCEs for anti-counterfeiting and information encryption have been demonstrated,suggesting the great potential of the BPLCEs-based CPL active materials.

关 键 词：circular quantum CRYSTAL 

分 类 号：TB34[一般工业技术—材料科学与工程] O43[机械工程—光学工程]