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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Highly efficient green phosphorescent OLEDs based on a novel iridium complex
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Highly efficient green phosphorescent OLEDs based on a novel iridium complex

机译:基于新型铱配合物的高效绿色磷光OLED

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A new iridium(III) complex tr(tfmppy)2(tfmtpip) (1, tfmppy = 4-trifluoromethylphenyl-pyridine, tfmtpip = tetra(4-trifluoromethylphenyl)imidodiphosphinate) was synthesized and applied in organic light-emitting diodes (OLEDs). The devices with the structures of ITO/TAPC (1,1-bis[4-[N,N-di(p-tolyl)amino] phenyl]cydohexane, 40 nm)/1 (x wt%): mCP (N,N'-dicarbazolyl- 3,5-benzene, 20 nm)/TmPyPB (1,3,5-tri(m-pyrid-3-yl-phenyl)benzene, 40 nm)/LiF (1 nm)/AI (100 nm) exhibited a maximum power efficiency ( η_(p,max)) of 113.23 Im W~(-1) and a maximum current efficiency ( η_(c,max)) of 115.39 cd A~(-1) (0.01342 mA cm~2) at the doping level of 5 wt%, which is among the best performances for lr(in) complex based OLEDs in the green-light-emitting region. Compared with our former work, the excellent device efficiencies are due to the use of TmPyPB as the electron-transporting/hole-blocking layer which has a relatively higher electron mobility than that of TPBi (2,2',2"-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole)) and the introduction of the -CF3 moiety to the Ir(IIII) complex, which can increase the electron mobility of the complex. The device performances proved that the complex has potential applications as an efficient green emitter in OLEDs.
机译:合成了一种新的铱(III)络合物tr(tfmppy)2(tfmtpip)(1,tfmppy = 4-三氟甲基苯基-吡啶,tfmtpip =四(4-三氟甲基苯基)亚氨基二次膦酸酯)并应用于有机发光二极管(OLEDs)。具有ITO / TAPC(1,1-双[4- [N,N-二(对甲苯基)氨基]苯基]环己烷,40 nm)/ 1(x wt%)结构的器件:mCP(N, N'-二咔唑基-3,5-苯,20 nm)/ TmPyPB(1,3,5-三(间-吡啶-3-基-苯基)苯,40 nm)/ LiF(1 nm)/ Al(100 nm)表现出113.23 Im W〜(-1)的最大功率效率(η_(p,max))和115.39 cd A〜(-1)(0.01342 mA cm)的最大电流效率(η_(c,max)) 〜2)的掺杂水平为5 wt%,这是在绿色发光区域中基于lr(in)配合物的OLED的最佳性能之一。与我们以前的工作相比,优异的器件效率归因于使用TmPyPB作为电子传输/空穴阻挡层,该层的电子迁移率比TPBi(2,2',2“-(1, 3,5-苯甲三基)-三(1-苯基-1-H-苯并咪唑)并将-CF3部分引入Ir(IIII)配合物中,可以提高配合物的电子迁移率,器件性能证明该复合物具有作为OLED中高效绿色发射器的潜在应用。

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