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Improvement of Out-coupling Efficiency of Organic Light Emitting Device by Ion-beam Plasma-treated Plastic Substrate  

Kim, Hyeun Woo (Dept. of Display and Semiconductor Engineering, Sunmoon University)
Song, Tae Min (Dept. of Display and Semiconductor Engineering, Sunmoon University)
Lee, Hyeong Jun (Dept. of Display and Semiconductor Engineering, Sunmoon University)
Jeon, Yongmin (Dept. of Biomedical Engineering, Gachon University)
Kwon, Jeong Hyun (Dept. of Display and Semiconductor Engineering, Sunmoon University)
Publication Information
Journal of the Semiconductor & Display Technology / v.21, no.2, 2022 , pp. 7-10 More about this Journal
Abstract
A functional polyethylene terephthalate substrate to increase light extraction efficiency of organic light-emitting diodes is studied. We formed nano-structured PET surfaces by controlling the power, gas, and exposure time of the linear ion-beam. The haze of the polyethylene terephthalate can be controlled from 0.2% to 76.0% by changing the peak-to-valley roughness of nano structure by adjusting the exposure cycle. The treated polyethylene terephthalate shows average haze of 76.0%, average total transmittance of 86.6%. The functional PET increases the current efficiency of organic light-emitting diodes by 47% compared to that of organic light-emitting diode on bare polyethylene terephthalate. In addition to polyethylene terephthalate with light extraction performance, by conducting additional research on the development of functional PET with anti-reflection and barrier performance, it will be possible to develop flexible substrates suitable for organic light-emitting diodes lighting and transparent flexible displays.
Keywords
Polyethylene terephthalate; ion beam; out coupling; haze; organic light-emitting didoe;
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Times Cited By KSCI : 4  (Citation Analysis)
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