Enhanced light extraction from GaN-based LEDs with a bottom-up assembled photonic crystal |
| |
Authors: | Haibo Gong Xiaopeng Hao Yongzhong WuBingqiang Cao Wei XiaXiangang Xu |
| |
Affiliation: | a State Key Lab of Crystal Materials, Shandong University, Jinan, 250100, PR China b School of Materials Science and Engineering, University of Jinan, Jinan, 250022, PR China c Shandong Huaguang Optoelectronics Company, Ltd., Jinan, 250101, PR China |
| |
Abstract: | Photonic crystal (PhC) structure is an efficient tool for light extraction from light-emitting diodes (LEDs). The fabrication of a large area PhC structure on the light output surface of LEDs often involves sophisticated equipments such as nanoimprint lithography machine. In this study a monolayer of polystyrene (PS) microspheres was employed as a template to fabricate a noninvasive photonic crystal of indium tin oxide (ITO) on the surface of GaN-based LED. PS spheres can help to form periodic arrangement of bowl-like holes, a photonic crystal with gradually changed fill factors. Importantly, the electroluminescence intensity of LED with a photonic crystal was significantly enhanced by 1.5 times compared to that of the conventional one under various forward injection currents. |
| |
Keywords: | Photonic crystal Light-emitting diode ITO Polystyrene sphere Template |
本文献已被 ScienceDirect 等数据库收录! |
|