Synthesis and Characterization of Carbazole-Based Dendritic Host with Triphenylamine Core

doi:10.3724/SP.J.1095.2014.30395

Chinese Journal of Applied Chemistry

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Synthesis and Characterization of Carbazole-Based Dendritic Host with Triphenylamine Core

WANG Xingdong^1,2, WANG Shumeng^1,2, MA Zhihua¹, DING Junqiao², WANG Lixiang^1*, JING Xiabin¹, WANG Fosong¹

(1.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,Changchun 130022,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China)

Received:2013-08-04 Revised:2013-09-13 Published:2014-06-10 Online:2014-06-10

Abstract

Abstract: With triphenylamine as the core and the second generation oligocarbazole as the dendron, a dendritic host, namely H2A, has been designed and synthesized. H2A shows good film-forming properties and excellent thermal ability(Tg=351 ℃) and its triplet energy is 2.84 eV. When using H2A as the host for IrⅢ bis(4,6-difluorophenylpyridinato)picolate(FIrpic), blue-emitting electrophosphorescent devices reveal a turn-on voltage of 4.8 V, and a power efficiency of 7.0 lm/W. The performance is superior to that of 4,4′,4″-tris(N-carbazoyl)triphenylamine(TCTA), which shows a turn-on voltage and power efficiency of 6.0 V and 6.1 lm/W, respectively.

Key words: small molecular hosts, dendritic hosts, carbazole, thermal stability, electrophosphorescent devices

CLC Number:

O644.1

WANG Xingdong1,2, WANG Shumeng1,2, MA Zhihua1, DING Junqiao2, WANG Lixiang1*, JING Xiabin1, WANG Fosong1. Synthesis and Characterization of Carbazole-Based Dendritic Host with Triphenylamine Core[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30395.

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Synthesis and Characterization of Carbazole-Based Dendritic Host with Triphenylamine Core

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