作者:Y. T. Tao、E. Balasubramaniam、A. Danel、A. Wisla、P. Tomasik
DOI:10.1039/b007918i
日期:——
A series of 6-substituted-3-methyl-1-phenyl-4-(4-methoxyphenyl)-1H-pyrazolo[3,4-b]quinolines,
MeOPAQ-X (X = t-Bu, OMe, H, F, Cl, Br),
were synthesized and assessed as potential emitters in electroluminescent (EL)
devices. All derivatives emitted in the blue region with an emission λmax
ranging from 448 nm to 460 nm and a quantum yield between 0.55
and 0.20. EL devices with a configuration of ITO/NPB/CBP/TPBI:MeOPAQ-X/TPBI/Mg:Ag
were fabricated, where ITO, NPB, CBP, TPBI and Mg:Ag are indium tin oxide,
4,4′-bis[N-(1-naphthyl)-N-phenylamino]biphenyl,
4,4′-dicarbazolyl-1,1′-biphenyl, 2,2′,2′′-(benzene-1,3,5-triyl)tris[1-phenyl-1H-benzimidazole]
and magnesium ∶ silver alloy (∼10 ∶ 1)
respectively. Light emission from the dopant was observed. An external quantum
efficiency around 3% could be obtained for all substituted derivatives.
In particular, brightness around 13 000 cd m−2
was achieved for the device based on MeOPAQ-H. The performances were comparable
to the best available materials in the blue organic light-emitting diodes.
研究人员合成了一系列 6-取代-3-甲基-1-苯基-4-(4-甲氧基苯基)-1H-吡唑并[3,4-b]喹啉,即 MeOPAQ-X(X = t-Bu、OMe、H、F、Cl、Br),并将其作为电致发光(EL)器件中的潜在发光体进行了评估。所有衍生物都在蓝色区域发光,其发射 λmax 在 448 纳米到 460 纳米之间,量子产率在 0.55 到 0.20 之间。我们制作了配置为 ITO/NPB/CBP/TPBI:MeOPAQ-X/TPBI/Mg:Ag 的 EL 器件:Ag为氧化铟锡,4,4′-双[N-(1-萘基)-N-苯基氨基]联苯,4,4′-二咔唑基-1,1′-联苯,2,2′、2′′-(苯-1,3,5-三基)三[1-苯基-1H-苯并咪唑]和镁∶银合金(10 ∼ 1)。观察到了掺杂剂发出的光。尤其是基于 MeOPAQ-H 的器件,亮度达到 13 000 cd m-2。在蓝色有机发光二极管中,其性能可与现有的最佳材料相媲美。