We have fabricated efficient and color-stable white organic light-emitting diodes (WOLEDs) based on a simple double-layer device structure consisting of a blue-emitting oligoquinoline electron-transport layer and a poly(N-vinyl carbazole) layer doped with phosphorescent green and red iridium emitters. Pure white color with the CIE coordinates from (0.30, 0.31) to (0.34, 0.37) in the whole operating bias voltage range and luminous efficiency higher than 7 cd/A at a brightness up to 12 000 cd/m2 was achieved. These results demonstrate a new strategy to realizing easily processable, highly efficient, and color-stable WOLEDs with a simple structure.
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机译：我们基于简单的双层器件结构制造了高效且颜色稳定的白色有机发光二极管（WOLED），该双层器件结构由发蓝光的寡喹啉电子传输层和掺杂有磷光的聚（N-乙烯基咔唑）层组成绿色和红色铱发射器。在整个工作偏置电压范围内，CIE坐标为（0.30，0.31）至（0.34，0.37）的纯白色，在亮度高达12 000 cd / m 2 <时，发光效率高于7 cd / A。 / sup>已实现。这些结果证明了一种采用简单结构实现易于加工，高效且颜色稳定的WOLED的新策略。
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