Suppressing triplet state extension for highly efficient ambipolar phosphine oxide host materials in blue PHOLEDs

Chunmiao Han; Liping Zhu; Fangchao Zhao; Zhen Zhang; Jianzhe Wang; Zhaopeng Deng; Hui Xu; Jing Li; Dongge Ma; Pengfei Yan

doi:10.1039/C3CC49020C

Suppressing triplet state extension for highly efficient ambipolar phosphine oxide host materials in blue PHOLEDs†

Chunmiao Han,^a Liping Zhu,^b Fangchao Zhao,^b Zhen Zhang,^a Jianzhe Wang,^a Zhaopeng Deng,^a Hui Xu,*^a Jing Li,^a Dongge Ma*^b and Pengfei Yan^a

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* Corresponding authors

^a Key Laboratory of Functional Inorganic Material Chemistry, School of Chemistry and Materials, Heilongjiang University, Ministry of Education, Harbin 150080, P. R. China
E-mail: hxu@hlju.edu.cn
Fax: +86 451 86608042

^b State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
E-mail: mdg1014@ciac.jl.cn

Abstract

A series of phosphine oxide hosts were constructed to investigate the influence of the triplet state extension in hosts on electrophosphorescence, in which DPESPOPhCz with the carbazolyl-localized triplet state endowed its blue-emitting PHOLEDs with favourable performance, including an external quantum efficiency more than 13%.

Chemical Communications

Suppressing triplet state extension for highly efficient ambipolar phosphine oxide host materials in blue PHOLEDs†

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