| 초록 |
Four blue emitting compounds of 5P-2TP, 5P-2A, 5P-2P and 5P-2C for OLED based on hexaphenyl benzene moiety were demonstrated. Physical properties by the change of the substitution groups of the synthesized materials were systematically examined. Photoluminescence (PL) spectrum of the synthesized materials showed maximum emitting wavelengths of about 434~488 nm in solution state and 483~516 nm in film state, indicating blue emission color. OLED devices were fabricated by the synthesized compounds using vacuum deposit process as an emitting layer. Device structure was ITO/2-TNATA 60nm/ NPB 15nm/ EML 35nm/ TPBi 20nm/ LiF 1nm/ Al 200nm. Current efficiencies and CIE values of 5P-2TP, 5P-2A, 5P-2P and 5P-2C were 1.30, 1.76, 2.84 and 4.89 cd/A and (0.150, 0.076), (0.150, 0.073), (0.236, 0.458) and (0.240, 0.450) respectively. |
