標題: Functional imprinting structures on GaN-based light-emitting diodes for light pattern modulation and light extraction efficiency enhancement
作者: Tu, Sheng-Han
Wu, Shang-Yen
Lee, Yeeu-Chang
Pan, Jui-Wen
Kuo, Cheng-Huang
Wang, Chih-Ming
Chang, Jenq-Yang
光電系統研究所
Institute of Photonic System
關鍵字: GaN;light-emitting diode (LED);imprinting technology;far-field pattern modulation;light extraction
公開日期: 1-七月-2010
摘要: In this study, we demonstrated a simple method that can be used to simultaneously modulate the far field pattern and enhance the light extraction of GaN-based light-emitting diodes (LEDs). In this method, microstructures were imprinted on a reliable spin-on-glass surface on top of a transparent conductive layer. The far-field pattern was modulated using microoptical structures, and at the same time, the light extraction was enhanced owing to the small refractive index difference and surface roughness. There was no decrease in the electrical performance of these devices. The peak intensity shifted from 0 to 22A degrees in one-dimensional (1D) asymmetrically blazed periodic structures, and a flattened distribution with a uniform intensity within a span of 110A degrees was observed in two-dimensional (2D) symmetrically periodic structures. This method achieved 13 and 40% light enhancements for 1D and 2D structures, respectively.
URI: http://dx.doi.org/10.1007/s10043-010-0070-z
http://hdl.handle.net/11536/5224
ISSN: 1340-6000
DOI: 10.1007/s10043-010-0070-z
期刊: OPTICAL REVIEW
Volume: 17
Issue: 4
起始頁: 379
結束頁: 384
顯示於類別:期刊論文


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  1. 000280576400006.pdf