Synfacts 2007(5): 0492-0492  
DOI: 10.1055/s-2007-968414
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart · New York

Triphenylamine-Dendronized Pure Red Iridium Phosphors

Contributor(s): Timothy M. Swager, Wei Zhang
G. Zhou, W.-Y. Wong*, B. Yao, Z. Xie*, L. Wang
Hong Kong Baptist University and Center for Advanced Luminescence Materials, Hong Kong and Changchun Institute of Applied Chemistry, P. R. of China
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Publication History

Publication Date:
24 April 2007 (online)


Pure red-emitting bifunctional Ir(III) complexes with triphenylamine dendrons 5 and 6 have been synthesized and compared with the parent compound 4. A substantial increase of photoluminescence intensity with increasing dendritic generation was observed, indicating that the self-quenching of the triplet emission core is effectively blocked by the dendritic structures. The electroluminescence (EL) efficiencies based on these metallodendrimers are some of the highest ever reported for solution-processed devices and are comparable to those of vacuum-deposited devices.