We are grateful for the financial support from the National Natural Science Foundation of China (Nos. 20834006, 51073069, 51273078), the Ministry of Sci- ence and Technology of China (No. 2009CB623605), 111 project (No. B06009) and PCSIRT.
The molecular materials with structures of luminescent core and peripheral carrier groups (e.g. carbazoles), have exhibited high-performance in organic light-emitting diodes (OLEDs). Present work is to understand ...