Jang J S, Lee K S, Lee E J, Kwon M S, Kim T W
J Nanosci Nanotechnol. 2015 Jan;15(1):562-5. doi: 10.1166/jnn.2015.8304.
White organic light-emitting devices (WOLEDs) were fabricated utilizing blue and red emitting organic light-emitting devices and a color conversion layer (CCL) made of yttrium aluminum garnet (YAG:Ce3+) phosphors embedded into polymethylmethacrylate. The good color balance for the color conversion of the WOLEDs was achieved utilizing 20-nm blue and 10-nm red OLEDs. The electroluminescence spectrum for the fabricated device showed a white color consisting of the blue color from the 4,4-bis(2,2-diphenylethen-1-yl)bipheny layer, the red color from the tris-(8-hydroxyquinolinato) aluminum: 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran layer, and the green color from the YAG:Ce3+ phosphor. The Commission Internationale de l'Eclairage coordinates of the WOLEDs slightly shifted from (0.25, 0.23) of the blue and red emission OLEDs without phosphors to (0.34, 0.35) of the OLEDs with green phosphors, indicative of the pure white color. WOLEDs with a CCL exhibited three wavelength white emissions with a color rendering index of 86.
白色有机发光器件（WOLED）是利用蓝色和红色有机发光器件以及由嵌入聚甲基丙烯酸甲酯中的钇铝石榴石（YAG:Ce3+）荧光粉制成的颜色转换层（CCL）制造的。利用20纳米厚的蓝色和10纳米厚的红色OLED实现了WOLED颜色转换的良好颜色平衡。所制造器件的电致发光光谱显示出一种白色，它由4,4-双（2,2-二苯乙烯基）联苯层发出的蓝色、三（8-羟基喹啉）铝：4-（二氰基亚甲基）-2-甲基-6-（对二甲氨基苯乙烯基）-4H-吡喃层发出的红色以及YAG:Ce3+荧光粉发出的绿色组成。WOLED的国际照明委员会坐标从无荧光粉的蓝色和红色发光OLED的（0.25, 0.23）略微偏移到有绿色荧光粉的OLED的（0.34, 0.35），表明是纯白色。带有CCL的WOLED表现出三种波长的白色发射，显色指数为86。
