Hydrogen bond-modulated molecular packing and its applications in high-performance non-doped organic electroluminescence

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yizhong Shi
  • Kai Wang
  • Youichi Tsuchiya
  • Wei Liu
  • Takeshi Komino
  • Xiaochun Fan
  • Dianming Sun
  • Gaole Dai
  • Jiaxiong Chen
  • Ming Zhang
  • Caijun Zheng
  • Shiyun Xiong
  • Xuemei Ou
  • Jia Yu
  • Jiansheng Jie
  • Chihaya Adachi
  • Xiaohong Zhang

Detail(s)

Original languageEnglish
Pages (from-to)2734-2740
Journal / PublicationMaterials Horizons
Volume7
Issue number10
Online published13 Aug 2020
Publication statusPublished - 1 Oct 2020

Abstract

Exploiting high-performance non-doped organic light-emitting diodes (OLEDs) is a step towards future commercial application requirements, but great challenges remain due to quenching related to intermolecular triplet interaction. In this work, a novel strategy of exploiting high-performance non-doped electroluminescence via tuning intermolecular hydrogen bonding is demonstrated. Suitable intermolecular hydrogen bonding enables formation of a 3D supramolecular framework, which not only evidently restricts the nonradiative process and suppresses the triplet exciton quenching caused by π-π stacking of triplets, but also favors the horizontal molecular orientations especially in their non-doped states. The non-doped OLED based on the thermally activated delayed fluorescence emitter mTPy-PXZ with such suitable intermolecular hydrogen bonds exhibits the state-of-the-art performance with maximum external quantum efficiency of up to 23.6% with only 7.2% roll-off at 1000 cd m-2. Moreover, it is the first report that the performance of an OLED with a non-doped emitting layer can surpass its corresponding optimized doped device. It is believed that this hydrogen bond-modulated mechanism can not only provide a new pathway for designing emitters for high-performance non-doped organic electroluminescence, but also has great potential in other solid-state luminescence applications.

Citation Format(s)

Hydrogen bond-modulated molecular packing and its applications in high-performance non-doped organic electroluminescence. / Shi, Yizhong; Wang, Kai; Tsuchiya, Youichi et al.
In: Materials Horizons, Vol. 7, No. 10, 01.10.2020, p. 2734-2740.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review