Efficient deep-blue electrofluorescence with an external quantum efficiency beyond 10%

Wang, SL; Qiao, MY; Ye, ZH; Dou, DH; Chen, MY; Peng, Y; Shi, Y; Yang, XY; Cui, L; Li, JY; Li, CJ; Wei, B; Wong, WY

Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/88911

Title:	Efficient deep-blue electrofluorescence with an external quantum efficiency beyond 10%
Authors:	Wang, SL Qiao, MY Ye, ZH Dou, DH Chen, MY Peng, Y Shi, Y Yang, XY Cui, L Li, JY Li, CJ Wei, B Wong, WY
Issue Date:	30-Nov-2018
Source:	iScience, 30 Nov. 2018, v. 9, p. 532-555
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)anthraGene 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'-bianthraGene (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.
Publisher:	Cell Press
Journal:	iScience
EISSN:	2589-0042
DOI:	10.1016/j.isci.2018.10.026
Rights:	© 2018 The Authors. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) The following publication Wang, S. L., Qiao, M. Y., Ye, Z. H., Dou, D. H., Chen, M. Y., Peng, Y., . . . Wong, W. Y. (2018). Efficient deep-blue electrofluorescence with an external quantum efficiency beyond 10%. iScience, 9, 532-541 is available at https://dx.doi.org/10.1016/j.isci.2018.10.026
Appears in Collections:	Journal/Magazine Article