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Conference Paper
Light Extraction for White OLED by Nano-structures and High Refractive Index Layer
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- Authors
- Doo-Hee Cho, Jin-Wook Shin, Seung Koo Park, Jaehyun Moon, Bong Joon Lee, Nam Sung Cho, Jun-Han Han, Jin Woo Huh, Chul Woong Joo, Joohyun Hwang, Hye Yong Chu, Jeong-Ik Lee
- Issue Date
- 2012-08
- Citation
- International Meeting on Information Display (IMID) 2012
- Language
- English
- Type
- Conference Paper
- Abstract
- We have obtained substantial light extraction enhancement by using nano-scale surface modified glasses and a planarization layer with high refractive index. The surface modification has been carried out using dewetted metal mask and chemical etching. The high refractive index planarization layer has been prepared from TiO 2 colloidal sol. The OLEDs with the light extraction layer showed 33% and 22% of external quantum efficiency improvement compared to the OLED without the light extraction layer.
- KSP Keywords
- Colloidal sol, External Quantum Efficiency, High refractive index, Nano-Scale, Surface-modified, Tio 2, chemical etching, efficiency improvement, light extraction, metal mask, nano-structures