Using an embedded nanocomposite layer to increase color-conversion efficiency of organic light-emitting diodes
| Autor: | Chih-Hao Chang, Hsin-Yu Hung, Yu-Jhong Lo, Yu-Fang Huang, Jun-Lin Huang, Yea-Fen Jang, Hsin-Hua Chang |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Nanocomposite business.industry Energy conversion efficiency Nanoparticle General Chemistry Condensed Matter Physics Fluorescence Electronic Optical and Magnetic Materials Biomaterials Materials Chemistry OLED Optoelectronics Electrical and Electronic Engineering business Absorption (electromagnetic radiation) Layer (electronics) Diode |
| Zdroj: | Organic Electronics. 15:1906-1912 |
| ISSN: | 1566-1199 |
| Popis: | Down-conversion white organic light-emitting diodes (WOLEDs) have a significant advantage in generating stabilized white-light emissions, but still have room for further improvement in terms of color-conversion efficiency. We demonstrated that TiO2 nanoparticles mixed with fluorescent dyes could be used to increase the absorption of dyes and thus boost the efficiency of color-conversion. WOLEDs with a nanocomposite color-conversion layer achieved high efficiencies of 12.3% (22.9 cd/A and 22.5 lm/W) and stable white-light emission. In addition, the EL spectra with different viewing angles are close to the ideal Lambertain curve. These outcomes indicate that the nanocomposite-based color-conversion possesses great potential for use in display and lighting applications. |
| Databáze: | OpenAIRE |
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