| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1264873 | Organic Electronics | 2014 | 7 Pages |
•TiO2 nanoparticles mixed with fluorescent dyes could be used to increase the absorption of dyes in color-conversion layer.•The EL spectra with different viewing angles are close to the ideal Lambertain curve.•WOLEDs with a nanocomposite color-conversion layer achieved high efficiencies and stable white-light emission.
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.
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