摘要
Surface texturing has been widely adopted to enhance the light extraction efficiency of light-emitting diodes (LEDs), and chemical etching is a technique commonly used to produce surface texturing. This study employed femtosecond lasers to apply ITO films directly onto the surface of LEDs to generate periodic micro/nanostructures and roughen the surface without contact or chemical substances. As a result, photons emitted in the active region escape into the free space, due to the scattering effect produced by texturing. This study discovered that light-emitting efficiency increases with surface roughness, and achieved an improvement of 18%. Caution regarding laser fluence was required during laser processing to avoid damaging the LED beneath the ITO film, which could detract from the electrical characteristics.
原文 | 英語 |
---|---|
頁(從 - 到) | 15997-16002 |
頁數 | 6 |
期刊 | Optics Express |
卷 | 20 |
發行號 | 14 |
DOIs | |
出版狀態 | 已發佈 - 2012 7月 2 |
ASJC Scopus subject areas
- 原子與分子物理與光學