磷光
光电子学
材料科学
显色指数
共发射极
亮度
高颜色
有机发光二极管
渲染(计算机图形)
二极管
激发态
兴奋剂
发光二极管
亮度
光学
计算机科学
图层(电子)
纳米技术
荧光
物理
计算机图形学(图像)
彩色图像
人工智能
图像(数学)
核物理学
图像处理
作者
Caleb Coburn,Chanyeong Jeong,Stephen R. Forrest
出处
期刊:ACS Photonics
[American Chemical Society]
日期:2017-12-12
卷期号:5 (2): 630-635
被引量:24
标识
DOI:10.1021/acsphotonics.7b01213
摘要
High efficiency solid state lighting devices have the potential to significantly reduce lighting energy usage while also offering good color rendering and longer lifetimes than conventional lighting sources. While organic light emitting diodes are promising candidates for this application, their operational lifetime is limited by the blue phosphorescent chromophore. We demonstrate stacked white phosphorescent light emitting devices (SWOLEDs) with lifetimes (as determined from the time it takes to lose 30% of the initial luminance of 1000 cd/m2) of up to 80000 h. The correlated color temperature of the devices ranges between 2780 and 3300 K, with color rendering index as high as 89. The three emitter (red, green, and blue) devices contain up to five stacked elements and employ red emitting blocking layers, stable charge generation layers, graded doping, and hot excited state management to achieve long lifetime. The materials and layer structures used and design principles for SWOLEDs are discussed.
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