Efficient soluble deep blue electroluminescent dianthracenylphenylene emitters with CIE y (y ≤ 0.08) based on triplet-triplet annihilation

[Display omitted] 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...

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Bibliographic Details
Published in:Science bulletin (Beijing) 2019-06, Vol.64 (11), p.774-781
Main Authors: Peng, Ling, Yao, Jing-Wen, Wang, Mei, Wang, Lin-Ye, Huang, Xiao-Lan, Wei, Xin-Feng, Ma, Dong-Ge, Cao, Yong, Zhu, Xu-Hui
Format: Article
Language:English
Subjects:
Anthracene
Deep blue emission
Fluorescence
Organic light-emitting diodes
Triplet-triplet annihilation
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Summary:[Display omitted] 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 °C with a thermal decomposition temperature of over 430 °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.
ISSN:2095-9273
DOI:10.1016/j.scib.2019.04.029