Subscribe to RSS
Triphenylamine-Dendronized Pure Red Iridium Phosphors
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
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.