Moore and More ›› 2025, Vol. 1 ›› Issue (1): 79-98.DOI: 10.1007/s44275-024-00006-z

• PERSPECTIVE • Previous Articles    

A perspective on boron-based multiple resonance narrowband emitters and devices

Mingxu Du1, Jianping Zhou1, Xiaofeng Luo1, Lian Duan1,2, Dongdong Zhang1   

  1. 1. Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, China;
    2. Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China
  • Received:2023-10-14 Revised:2024-02-14 Accepted:2024-02-19 Online:2024-07-23 Published:2024-07-23
  • Contact: Lian Duan,E-mail:duanl@mail.tsinghua.edu.cn;Dongdong Zhang,E-mail:ddzhang@mail.tsinghua.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 52222308 and 22135004), the Guangdong Major Project of Basic and Applied Basic Research (Grant No. 2019B030302009) and the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021B1515120041), China Postdoctoral Science Foundation (Grant No. 043260519).

A perspective on boron-based multiple resonance narrowband emitters and devices

Mingxu Du1, Jianping Zhou1, Xiaofeng Luo1, Lian Duan1,2, Dongdong Zhang1   

  1. 1. Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, China;
    2. Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China
  • 通讯作者: Lian Duan,E-mail:duanl@mail.tsinghua.edu.cn;Dongdong Zhang,E-mail:ddzhang@mail.tsinghua.edu.cn
  • 作者简介:Mingxu Du received his Ph.D. degree from Jilin University in 2019. He is currently a postdoctoral fellow in Prof. Lian Duan’s group. His research interests include the novel functional molecular design, synthesis, and optoelectronic characterization of molecules.
    Jianping Zhou received his B.S. degree in the Department of Chemistry from Tsinghua University, Beijing, China, in 2023. Then, he is currently pursuing his Ph.D. degree under the supervision of Prof. Lian Duan. He has focused his research activities on the design of high-performance MR-TADF materials and chiral MR-TADF (CP-MRTADF) materials.
    Xiaofeng Luo is a Ph.D. student under the supervision of Prof. Lian Duan in the Department of Chemistry, Tsinghua University. His current research focuses on the design and synthesis of multi-resonance thermally activated delayed fluorescence (MR-TADF) materials for high-performance OLEDs.
    Lian Duan received his Ph.D. degree from the Department of Chemistry, Tsinghua University, in 2003, where he currently works. His research focuses on new organic materials for flexible optoelectronics.
    Dongdong Zhang received his Ph.D. degree from the Department of Chemistry, Tsinghua University, in 2016, under the supervision of Prof. Yong Qiu and Prof. Lian Duan, where he is currently working. His research interests focus on developing new TADF materials as emitters or hosts for high-performance OLEDs.
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 52222308 and 22135004), the Guangdong Major Project of Basic and Applied Basic Research (Grant No. 2019B030302009) and the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021B1515120041), China Postdoctoral Science Foundation (Grant No. 043260519).

Abstract: Boron-based multiple resonance thermally activated delayed fluorescent (MR-TADF) emitters have shown great promises for applications in high-definition displays. This class of heteroatom-doped nanographene materials typically show very narrow-band emission, small singlet-triplet split (ΔEST) values, high Photoluminescence quantum yield, quality chemical and thermal stabilities. Undoubtedly, boron-based MR-TADF emitters hold a leading position in satisfying the wide-color gamut standard of BT. 2020 (The International Telecommunication Union announced a new color gamut standard of broadcast service television for ultra-high-definition TV in 2012). Thus, the development of novel boron-based MR-TADF emitters attracted a great deal of attention from both academia and industry. Here, a comprehensive overview of the latest advances in boron-based MR-TADF emitters is presented, therein, rational strategies for molecular designs, as well as the consequent optical behavior and efficiency and lifetime improvement in organic light-emitting diodes (OLED) devices are discussed. Finally, the challenges as well as some future research directions to unlock the full potential of this fascinating class of materials are provided.

Key words: Multiple resonance, Narrowband, Emission regulation, Efficiency, Stability

摘要: Boron-based multiple resonance thermally activated delayed fluorescent (MR-TADF) emitters have shown great promises for applications in high-definition displays. This class of heteroatom-doped nanographene materials typically show very narrow-band emission, small singlet-triplet split (ΔEST) values, high Photoluminescence quantum yield, quality chemical and thermal stabilities. Undoubtedly, boron-based MR-TADF emitters hold a leading position in satisfying the wide-color gamut standard of BT. 2020 (The International Telecommunication Union announced a new color gamut standard of broadcast service television for ultra-high-definition TV in 2012). Thus, the development of novel boron-based MR-TADF emitters attracted a great deal of attention from both academia and industry. Here, a comprehensive overview of the latest advances in boron-based MR-TADF emitters is presented, therein, rational strategies for molecular designs, as well as the consequent optical behavior and efficiency and lifetime improvement in organic light-emitting diodes (OLED) devices are discussed. Finally, the challenges as well as some future research directions to unlock the full potential of this fascinating class of materials are provided.

关键词: Multiple resonance, Narrowband, Emission regulation, Efficiency, Stability