1. White polymeric light-emitting diodes with high color rendering index.
- Author
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Niu, Xiaodi, Ma, Liang, Yao, Bing, Ding, Junqiao, Tu, Guoli, Xie, Zhiyuan, and Wang, Lixiang
- Subjects
- *
WHITE , *LIGHT emitting diodes , *POLYMERS , *COLOR , *ELECTRON transport , *PHOSPHORESCENCE - Abstract
The efficient white polymeric light-emitting diodes based on a white emissive polymer doped with a red phosphorescent dopant were fabricated by spin-coating method. The emission spectrum of the device is broadened to cover the full visible region by doping the red phosphorescent dye and thereby realizes white emission with high color-rendering index (CRI). By controlling the contents of the doped electron-transporting 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole and the red phosphorescent dopant, a luminous efficiency as high as 5.3 cd/A and a power efficiency of 3 lm/W were obtained with a CRI of 92. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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