High-color-rendering pure-white phosphorescent organic light-emitting devices employing only two complementary colors
| Autor: | Yun Chi, Chih-Hao Chang, Chung-Chia Chen, Chung-Chih Wu, Sheng-Yuan Chang, Jui-Yi Hung |
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| Rok vydání: | 2010 |
| Předmět: |
Organic electronics
Brightness business.industry Chemistry chemistry.chemical_element Phosphor Complementary colors General Chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials Biomaterials Color rendering index Optics Materials Chemistry OLED Optoelectronics Iridium Electrical and Electronic Engineering business Phosphorescence |
| Zdroj: | Organic Electronics. 11:266-272 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2009.11.004 |
| Popis: | We report successful fabrication of high-color-rendering pure-white phosphorescent organic light-emitting devices (OLEDs) by employing a true-blue iridium complex Ir(dfbppy)(fbppz)2 and a wide-bandwidth yellow emitting osmium complex Os(bptz)2(dppee). The two-component phosphorescent white OLED exhibited a high color rendering index (CRI) of 81 and CIEx,y coordinates close to the ideal white emission (0.33, 0.33). By doping the yellow phosphors into the hole-transport layer and the electron-transport layer adjacent to the blue-emitting layer and thereby forming a triple-emitting-layer device structure, we obtained WOLED which exhibited rather stable colors at different biases/ brightnesses. Such high-CRI pure-white two-component WOLEDs yielded EL efficiencies of up to 9.5%, 22.9 cd/A, and 20 lm/W for the forward directions. |
| Databáze: | OpenAIRE |
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