近红外有机小分子电致发光材料研究进展

Research progress of near infrared organic small-molecule electroluminescent materials

近红外有机发光材料与器件在信息安全、光纤通信、生物成像、医学诊断等重要领域具有广阔的应用前景。近几年,基于热激发延迟荧光、局域电荷转移杂化态、发光自由基的双重态激子发光等机理,电致发光过程中激子的利用率已达到100%,大幅提高了近红外有机电致发光器件的性能。本文综述了近红外有机小分子电致发光材料的研究进展。根据不同的发光机理对材料进行了分类,对各类发光机理及材料与器件的性能进行了总结,并对未来的发展前景进行了展望。

Near-infrared(NIR)emitting materials and devices have broad application prospects in fields of information security,optical fiber communication,bioimaging and medical diagnosis.In recent years,new mechanisms based on thermally activated delayed fluorescence(TADF),hybridized local and charge-transfer excited state(HLCT)and radical-based doublet emission,make the NIR devices full exciton utilization and high electroluminescent performance.In this paper,the progress of NIR organic small-molecule electroluminescent materials is reviewed.These materials are classified with different luminescent mechanism,and their electroluminescent performances and further development prospects are summarized.