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合成并表征了配体为苯并噻唑衍生物的2种新型铱配合物,三[N,N-二(4甲苯基)-4-(2-苯并噻唑基)苯胺]合铱(Ir(bpmp)3)和三[N,N-二苯基-4(-2-苯并噻唑基)苯胺]合铱(Ir(bpp)3)。以铱配合物Ir(bpmp)3作为发光层,以聚(3,4亚乙氧基噻吩)(PEDOT)为空穴传输层制备结构为ITO/PEDOT/Ir(bpmp)3/Ca/Al的发光器件,当驱动电压为5V时,可观察到橙红色磷光,最大发射波长在550～650nm之间。当驱动电压为19V时,最大发光亮度为20cd/m2。最大外功率效率仅为9×10-4lm/W,最大电流效率仅为4×10-3cd/A。外功率效率和电流效率极低的原因是由于将Ir(bpmp)3直接当作磷光发光层,导致严重的三线态-三线态淬灭以及浓度淬灭。
Two novel iridium complexes with benzothiazole derivatives as ligands were synthesized and characterized. Ir (Ir ((4-tolyl) -4- (2-benzothiazolyl) bpmp) 3) and tris [N, N-diphenyl-4 (-2-benzothiazolyl) anilide] iridium (Ir (bpp) 3). The structure of ITO / PEDOT / Ir (bpmp) 3 / Ca / Al was prepared with iridium complex Ir (bpmp) 3 as the emitting layer and poly (3,4-ethyleneoxythiophene) Light-emitting device, when the driving voltage is 5V, orange-red phosphorescence can be observed, the maximum emission wavelength is between 550 and 650nm. When the driving voltage is 19V, the maximum brightness is 20cd / m2. The maximum external power efficiency is only 9 × 10-4lm / W, the maximum current efficiency is only 4 × 10-3cd / A. The reason for the extremely low external power efficiency and current efficiency is due to the fact that Ir (bpmp) 3 is directly used as a phosphorescent light emitting layer, leading to serious triplet-triplet quenching and concentration quenching.