Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (1): 16-24.doi: 10.1007/s40242-021-0403-4

• Reviews • Previous Articles     Next Articles

Structural Controls of Tetraphenylbenzene-based AIEgens for Non-doped Deep Blue Organic Light-emitting Diodes

HAN Pengbo1, QIN Anjun1, TANG Ben Zhong1,2   

  1. 1. State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, AIE Institute, Center for Aggregation-induced Emission, South China University of Technology(SCUT), Guangzhou 510640, P. R. China;
    2. Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration and Reconstruction, Institute for Advanced Study, and Department of Chemical and Biological Engineering, The Hong Kong University of Science & Technology(HKUST), Clear Water Bay, Kowloon, Hong Kong, P. R. China
  • Received:2020-12-01 Revised:2021-01-12 Online:2021-02-01 Published:2021-02-03
  • Contact: QIN Anjun E-mail:msqinaj@scut.edu.cn
  • Supported by:
    This work is supported by the National Natural Science Foundation of China(Nos.21788102, 21525417), the Natural Science Foundation of Guangdong Province, China(Nos.2019B030301003, 2016A030312002), and the Innovation and Technology Commission of Hong Kong, China(No.ITC-CNERC14S01).

Abstract: Aggregation-induced emission(AIE) has emerged as a new concept, giving highly efficient solid-state photoluminescence. Particularly, AIE luminogens(AIEgens) with deep blue emission(400-450 nm) have displayed salient advantages for nondoped organic light-emitting diodes(OLEDs). However, deep blue emitters with Commission Internationale de L'Eclairage(CIE) coordinates less than 0.08 are still rare. In this review, we outline the latest achievements in the molecular guidelines based on the AIE core of tetraphenylbenzene(TPB) for developing efficient deep blue AIEgens. We provide insights into the construction of deep blue emitters with high horizontal orientation by regulating the length of the linear molecule. We also discuss the luminescence mechanisms of these AIEgens-based OLEDs by using the magnetic field effects measurements. Finally, a summary of the challenges and perspectives of deep blue AIEgens for non-doped OLEDs is also presented.

Key words: Aggregation-induced emission(AIE), Non-doped device, Organic light-emitting diode, Deep blue emitter, Tetraphenylben-zene