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Ternary Ambipolar Phosphine Oxide Hosts Based on Indirect Linkage for Highly Efficient Blue Electrophosphorescence: Towards High Triplet Energy, Low Driving Voltage and Stable Efficiencies
Author(s) -
Yu Donghui,
Zhao Fangchao,
Han Chunmiao,
Xu Hui,
Li Jing,
Zhang Zhen,
Deng Zhaopeng,
Ma Dongge,
Yan Pengfei
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201104214
Subject(s) - ambipolar diffusion , ternary operation , materials science , phosphorescence , chromophore , optoelectronics , phosphine oxide , diode , photochemistry , phosphine , electron , fluorescence , optics , chemistry , catalysis , physics , organic chemistry , quantum mechanics , computer science , programming language
The effective strategy of indirect linakge for constructing ternary ambipolar phosphine oxide (PO) hosts with the high first triplet energy levels (T 1 ) was successfully demonstrated. The interplay between the chromophore, hole and electron transporting moieties was effectively restrained. Both of T 1 as high as 3.0 eV and ambipolar characteristics were perfectly realized, which consequently resulted in the highly efficient blue‐emitting phosphorescent organic light‐emitting diodes with low driving voltage and stable efficiencies.