以苯并二噻吩衍生物为核心的 D^′ -A-D-A-D'型红光染料制备与应用

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关键词：有机红光材料；苯并二噻盼；氟化；红光色纯度；红光LED中图分类号：0482.31 文献标识码：ADOI：10.37188/CJL.20250079 CSTR：32170.14.CJL.20250079

Synthesisand ApplicationofBenzodithiopheneDerivativesBased D'A-D-A-D'Red Emitters

XIE Tianyou，SHI Mingkai，DONG Linlin，ZHOU Jinpeng，JIA Yixin，MIAO Yanqin*，GUO Kunpeng （KeyLaboratoryofInterfaceScienceandEngineeringinAdvancedMaterials，MinistryofEducation TaiyuanUniversityofTechnology，TaiyuanO3oo24，China） Corresponding Authors，E-mail：miaoyanqin@tyut.edu.cn；guokunpeng@tyut.edu.cn

Abstract：Organic red emiters have shown great prospective applications in ful-color displays，fluorescent probes，andphotothermal therapy，etal.However，itis stillchallnging fororganicemitters that exhibited intense red emission with a maximum emission（ λem ）above68O nminsolid state.In thiswork，two D′ -A-D-A-D'molecules witha benzodithiophenederivativecore donor（D），a benzothiadiazole acceptor（A）anda N-phenyl-2-naphthylamine derivative peripheral electron donor（D'） but differingin fluorine-free D and fluorinated D '（RF） were synthesized.Their chemical structures were characterized and confirmedby nuclear magnetic resonancespectroscopyand mass spectroscopy.It is found both of them presented λem> 700 nmin solid films.Meanwhile，RF showed a more pronounced aggregation-induced emision enhancement effct and a higher photoluminescencequantum yield than those of RH，atributed tothefluorination induceda larger dipole moment and more twisted structure of RF.LED devices basedonRHandRFdoped PMMAascolour conversion layers were fabricated，respectively.The maximum brightnessofRFbaseddevicereaches2.5-foldofRHbaseddeviceata3.8Vwork voltage，anditsCIEcoordinates （0.70，0.27）close to standardred lightofBT.2O2Ocolorgamut.This work providesapromising wayfordeveloping organic red emitters with higher brightness and colour-purity.

Key Words：organic red emitters；benzodithiophene；fluorination；red light color purity；red LED

1引言

最大发射波长大于 680nm 的红光材料在全色显示、生物成像、光动力治疗以及荧光探针等领域有着重要的应用前景而吸引了大量的研究兴趣[15]。（剩余16540字）