Efficient Deep-Blue Electrofluorescence with an External Quantum Efficiency Beyond 10%

Shuanglong Wang, Mengya Qiao, Zhonghua Ye, Dehai Dou, Minyu Chen, Yan Peng, Ying Shi, Xuyong Yang, Lei Cui, Jiuyan Li, Chunju Li, Bin Wei, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

37 Citations (Scopus)

Abstract

The design of blue fluorescent materials combining both deep-blue emission (CIEy<0.06)and high-efficiency climbing over the typically limited exciton production efficiency of 25% is a challenge for organic light-emitting diodes (OLEDs). In this work, we have synthesized two blue luminogens, trans-9,10-bis(2-butoxyphenyl)anthracene (BBPA)and trans-9,10-bis (2,4-dimethoxyphenyl)anthracene with high photoluminescence quantum yields (PLQYs)of 89.5% and 87.0%, respectively. Intriguingly, we have proposed a strategy to avoid aggregation-caused quenching, which can effectively reduce the undesirable excimeric emission by introducing two host matrices with twisted molecular structure, 9,10-di(naphth-2-yl)anthracene and 10,10′-bis-(4-fluorophenyl)-3,3′-dimethyl-9,9′-bianthracene (MBAn-(4)-F), in the BBPA emission layer. The device containing the EML of BBPA-doped MBAn-(4)-F exhibited a high external quantum efficiency of 10.27% for deep-blue emission with the Commission International de L'Eclairage CIE coordinates of (0.15, 0.05)via the steric effect. Importantly, this represents an advance in deep-blue-emitting fluorescent OLED architectures and materials that meet the requirements of high-definition display.

Original languageEnglish
Pages (from-to)532-541
Number of pages10
JournaliScience
Volume9
DOIs
Publication statusPublished - 30 Nov 2018

Keywords

  • Materials Science
  • Optical Materials
  • Polymers

ASJC Scopus subject areas

  • General

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