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White organic light-emitting device based on a compound fluorescent-phosphor-sensitized-fluorescent emission layer

机译:基于复合荧光 - 磷光体 - 荧光发射层的白色有机发光装置

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摘要

The authors demonstrate a combination fluorescent and phosphor-sensitized-fluorescent white organic light-emitting device (WOLED), employing the conductive host material, 4,4′4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′1,1′-biphenyl, doped with the phosphorescent green, and the fluorescent red and blue emitters, fac-tris(2-phenylpyridinato-N,C2′N,C2′) iridium (III), 4-(dicyanomethylene)-2-t2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H4H-pyran, and 4,4′4,4′-bis (9-ethy-3-carbazolvinylene)-1-1′1-1′-biphenyl, respectively. Although two fluorescent dopants are employed along with only a single phosphor, this simple structure can, in principle, achieve 100% internal quantum efficiency. In the prototype, the phosphor-sensitized WOLED exhibits total external quantum and power efficiencies of ηext,tot = 13.1±0.5%ηext,tot=13.1±0.5% and ηp,tot = 20.2±0.7 lm/Wηp,tot=20.2±0.7lm∕W, respectively, at a luminance of 800 cd/m2800cd∕m2 with Commission Internationale de L’Eclairage chromaticity coordinates of (x = 0.38(x=0.38, y = 0.42y=0.42) and a color rendering index of 79.
机译:作者展示了一种荧光和磷光敏化荧光白色有机发光器件(WOLED)的组合,该器件使用了导电主体材料4,4'4,4'-双(9-乙基-3-咔唑亚乙烯基)-1, 1'1,1'-联苯,掺杂有磷光绿色,荧光红色和蓝色发射体,fac-tris(2-苯基吡啶基-N,C2'N,C2')铱(III),4-(二氰基亚甲基) -2-t2-叔丁基-6-(1,1,7,7-四甲基氟烷基-9-烯基)-4H4H-吡喃和4,4'4,4'-双(9-乙基-3-咔唑乙烯撑)-1-1'1-1'-联苯。尽管只使用了两个荧光掺杂剂和一个荧光粉,但是这种简单的结构原则上可以实现100%的内部量子效率。在原型中,荧光粉敏化的WOLED的总外部量子和功率效率为ηext,tot = 13.1±0.5%ηext,tot = 13.1±0.5%和ηp,tot = 20.2±0.7μlm/Wηp,tot = 20.2±0.7 lm ∕ W分别在800 cd / m2800cd ∕ m2的亮度下,国际照明委员会色度坐标为(x = 0.38(x = 0.38,y = 0.42y = 0.42),显色指数为79。

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