| 초록 |
A series of chrysene derivatives with methyl substituents were synthesized and as EML material for Organic Linght Emitting Devices (OLED). The effects of substituted methyl substituents have been compared based on both materials and solid device evaluation. Its physical properties such as optical, electrochemical and electroluminescent properties were investigated. Three compounds were used as emitting layer (EML) in OLED device: ITO / NPB (40 nm) / TCTA(20nm)/ synthesized materials (30 nm) / TPBi (20 nm) / LiF / Al. The luminance efficiency of the synthesized compound at 10mA/cm2 were measured 1.90cd/A for 901, 1.19cd/A for 903 and 2.19cd/A for 907, respectively. Moreover, the power efficiency were measured 0.95lm/W for 901, 0.68lm/W for 903 and 1.14lm/W for 907. The device, prepared by using the dimethyl-substituted material at meta position, showed the best performance with CIE(x,y)=(0.15,0.11). |
