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Organic light-emitting diodes(OLEDs) have attracted considerable progress in both academic and industrial interests since the pioneering work by Tang et al.in 1987.1 While the development of OLED process technology is needed for OLED to gain exclusive dominance in markets like TV and lighting,the development of a red,green and blue emitter with high electroluminescence(EL) efficiency,good thermal property,and long device lifetime as well as pure color coordinates is essential for embodiment of high performance device.