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Journal Article
Color temperature tuning of white organic light-emitting diodes via spatial control of micro-cavity effects based on thin metal strips
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- Authors
- Jonghee Lee, Tae-Wook Koh, Hyunsu Cho, Simone Hofmann, Sebastian Reineke, Jae-Hyun Lee, Jeong-Ik Lee, Seunghyup Yoo, Karl Leo, Malte C. Gather
- Issue Date
- 2015-11
- Citation
- Organic Electronics, v.26, pp.334-339
- ISSN
- 1566-1199
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- Abstract White organic light-emitting diodes (WOLEDs) are one of the most promising technologies to realize future solid-state lighting with high power efficiency, broad and adjustable spectral coverage, and area emission for more effective and natural illumination. In this work, we report a new method of tuning the correlated color temperature (CCT) of WOLEDs via spatially controlling the degree of the micro-cavity effect in an OLED. Varying the width of thin Ag strips deposited on top of a transparent electrode leads to changes in both intensity and phase of reflection at the anode, hence significantly altering emission spectra of proposed WOLEDs. CCT of the implemented WOLEDs span a wide range, from 3000 K to 8000 K, demonstrating that our proposed approach helps to meet the need for lighting with various CCTs.
- KSP Keywords
- Natural illumination, Organic light-emitting diodes(OLEDS), Solid state lighting, Spatial control, Temperature tuning, White organic light-emitting diodes, Wide range, correlated color temperature, emission spectra, high power efficiency, light-emitting diode(LED)