期刊
SCIENCE BULLETIN
卷 64, 期 11, 页码 774-781出版社
ELSEVIER
DOI: 10.1016/j.scib.2019.04.029
关键词
Anthracene; Deep blue emission; Fluorescence; Organic light-emitting diodes; Triplet-triplet annihilation
资金
- National Key RAMP
- D Program of China [2016YFB0400701]
- NSFC-Guangdong Joint Program [U1801258, U1301243]
- Department of Science and Technology of Guangdong Province [2017A050503002]
- Foundation of Guangzhou Science and Technology Project [201504010012]
- Dongguan Major Special Project [2017215117010]
It has been challenging to develop deep blue organic molecular fluorescent emitters with CIE y (y <= 0.08) based on triplet-triplet annihilation (TTA). Here, we report facilely available dianthracenylphenylene-based emitters, which have a 3,5-di(4-t-butylphenyl)phenyl moiety at the one end and 4-cyanophenyl or 3-pyridyl at the other end, respectively. Both fluorophores show a high glass transition temperature of over 220 degrees C with a thermal decomposition temperature of over 430 degrees C at an initial weight loss of 1%. The preliminary characterizations of the organic light-emitting diodes (OLEDs) that utilized these nondoped emitters provided high EQEs of 4.6%-5.9% with CIE coordinates (0.15, 0.07-0.08). The analysis of the EL transient decay revealed that TTA contributed to the observed performance. The results show that the new emitters are attractive as a potential TTA-based host to afford stable deep blue fluorescent OLEDs. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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