Management of charge carriers and excitons for efficient and color-stable white phosphorescent organic light-emitting diodes with simplified structure
| Autor: | Bingye Chen, Yi Zhao, Guangguang Han, Liangmei Zuo, Kaiwen Xue, Ping Chen, Yu Duan |
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| Rok vydání: | 2016 |
| Předmět: |
Range (particle radiation)
Materials science business.industry Ambipolar diffusion Exciton 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Luminance 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials Materials Chemistry OLED Optoelectronics Charge carrier Electrical and Electronic Engineering 0210 nano-technology business Phosphorescence Diode |
| Zdroj: | Organic Electronics. 37:207-212 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2016.06.033 |
| Popis: | We have demonstrated color-stable and highly efficient simplified white phosphorescent organic light-emitting diodes. The key feature is the use of a novel approach to confine the distribution of charge carriers and excitons across the whole blue emission layer. The resulting two-color white device has the maximum power efficiency and current efficiency of 45.5 lm/W and 43.5 cd/A with a very low color shift over a wide range of luminance. By systematically investigating the working mechanisms, we found that the ambipolar charge carrier transport ability of co-host layer which ensures the distribution of excitons to form in the whole blue emission layer was the critical factors for constructing color-stable white devices. Our results show that simplified white devices based on two organic materials achieving excellent color stability are possible. |
| Databáze: | OpenAIRE |
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