期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 176, 期 13, 页码 1028-1031出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2011.05.026
关键词
Photonic crystal; Light-emitting diode; ITO; Polystyrene sphere; Template
资金
- NSFC
- National Basic Research Program of China (973 Program)
- Fund for the Natural Science of Shandong Province
- Scientific Research Award for the Excellent Middle-Aged and Young Scientists of Shandong Province
- UJN
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. (C) 2011 Elsevier B.V. All rights reserved.
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