摘要
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。
The present paper deals with the preparation and characterization of new tris-cyclometalated iridium complexes with p-substituted-2-phenylbenzothiazol ligands. The device performance was tested with a general OLED architecture of ITO(indium tin oxide)/poly(3,4-ethylenedioxythiophene)(PEDOT)/Ir(bpmp)_(3)/Ca/Al, where PEDOT was used as the hole transporting layer and Ir-complex as the (emissive) layer. The Orange-red electrophosphorescence(emission peak at 550~650 nm) turned at around (5 V), with a maximum brightness of 20 cd/m^(2) at 19 V. Both the current efficiency(4×10^(-3) cd/A) and the power efficiency(9×(10^(-4) lm/W)) were low due to the triplet-triplet annihilation and concentration quenching (arising) from strong (bimolecular) interactions when only using Ir-complex as the emissive layer. Further optimization of OLED (performance) can be expected by blending conjugated polymers with Ir-complexes and by better (engineering) of the device structure.
出处
《应用化学》
CAS
CSCD
北大核心
2005年第5期502-506,共5页
Chinese Journal of Applied Chemistry
基金
上海市科委基金资助项目(04dz05102)
