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2017 , Vol. 37 >Issue 10: 2457 - 2480

DOI: https://doi.org/10.6023/cjoc201704015

综述与进展

电子给体-受体型热活化延迟荧光蓝光材料研究进展

  • 谭继华 ,
  • 霍延平 ,
  • 蔡宁 ,
  • 籍少敏 ,
  • 李宗植 ,
  • 张力
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  • a 广东工业大学轻工化工学院 广州 510006;
    b 中国科学院上海有机化学研究所 有机氟化学中国科学院重点实验室 上海 200032

收稿日期: 2017-04-11

  修回日期: 2017-06-03

  网络出版日期: 2017-06-16

基金资助

国家自然科学基金（Nos.61671162，21372051）、广东省科技计划（No.2016A010103031）及广东省高等学校青年珠江学者岗位计划（2016）资助项目.

收起

Progress on Donor-Acceptor Type Thermally Activated Delayed Fluorescence Based Blue Emitters

  • Tan Jihua ,
  • Huo Yanping ,
  • Cai Ning ,
  • Ji Shaomin ,
  • Li Zongzhi ,
  • Zhang Li
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  • a School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006;
    b Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Cheimstry, Chinese Academy of Sciences, Shanghai 200032

Received date: 2017-04-11

  Revised date: 2017-06-03

  Online published: 2017-06-16

Supported by

Project supported by the National Natural Science Foundation of China (Nos.61671162,21372051),the Science and Technology Planning Project of Guangdong Province (No.2016A010103031) and the Guangdong Provience Universities and Colleges Young Pearl River Scholar Funded Scheme (2016).

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摘要

热活化延迟荧光材料由于其最低激发单重态和最低激发三重态之间的能级差较小，三重态激子可以通过反向系间窜越过程上转换到单重态，实现无贵金属添加的三重态激子参与的荧光发射，大大提高了发光效率，解决了传统荧光有机发光二极管（OLED）内/外量子效率（≤25%/≤5%）低下的问题；与磷光OLED相比，避免了使用贵金属，在造价方面具有更大优势.在类型众多的热活化延迟荧光（TADF）材料中，由于电子给体-受体型分子合成简单，性能出众而成为近年来的研究热点.另一方面，高效蓝光材料的稳定性及色纯度问题一直是该领域研究亟待解决的难题.本文将依据不同电子给受体单元，对电子给体-受体型热活化延迟荧光蓝光材料及其OLED器件的最新进展、发光原理和设计原则进行了简要综述，并对其发展作出展望.

关键词： D-A型; 热活化延迟荧光; 蓝光材料; 有机发光二极管

本文引用格式

谭继华 , 霍延平 , 蔡宁 , 籍少敏 , 李宗植 , 张力 . 电子给体-受体型热活化延迟荧光蓝光材料研究进展[J]. 有机化学, 2017 , 37(10) : 2457 -2480 . DOI: 10.6023/cjoc201704015

Abstract

In thermally activated delayed fluorescence (TADF) based emitters, the excitons from the lowest triplet state (T1) can be efficiently upconverted into the lowest singlet (S1) state via reverse intersystem crossing (RISC) process due to the small energy gap (ΔEST) between their S1 and T1 states, harvesting both S1 and T1 excitons for emission, with non-noble metals, which can break the internal/external quantum efficiency (IQE/EQE) (≤25%/≤ 5%) limitation of conventional fluorescence based organic light-emitting diodes (OLEDs). Their no-noble metals feature makes them more competitive than phosphorescence materials in making OLEDs. Among the vast of TADF materials, eletrons donor-acceptor (D-A) type is one of the most popular TADF material due to their outstanding performance and convenience of preparation. On the other hand, efficient blue emitters are facing issues related to their stability and color purity that makes their development quite challenging for researchers. In this review, the D-A type blue TADF emitters and OLEDs reported recently are summarized, the mechanism of TADF based OLEDs and the principle of designs are elaborated, and a full vision of its development is made.

Key words： D-A type; thermally activated delayed fluorescence; blue emitter; organic light-emitting diode

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