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Citation: WANG Xingdong, WANG Shumeng, MA Zhihua, DING Junqiao, WANG Lixiang, JING Xiabin, WANG Fosong. Synthesis and Characterization of Carbazole-Based Dendritic Host with Triphenylamine Core[J]. Chinese Journal of Applied Chemistry, ;2014, 31(6): 684-689. doi: 10.3724/SP.J.1095.2014.30395 shu

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

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

Corresponding author: WANG Lixiang,
Received Date: 4 August 2013
Available Online: 16 September 2013
Fund Project: 国家重点基础研究发展计划(973计划)(2009CB623601) (973计划)(2009CB623601)国家自然科学基金资助项目(51322308,21174144和21204084) (51322308,21174144和21204084)国家创新研究群体科学基金(20921061) (20921061)

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(T_g=351℃) and its triplet energy is 2.84 eV.When using H2A as the host for Ir^Ⅲ 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.
- small molecular hosts,
- dendritic hosts,
- carbazole,
- thermal stability,
- electrophosphorescent devices
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