Acta Optica Sinica, Volume. 31, Issue s1, 100416(2011)
Influence of Patterned Substrate Parameters on Luminous Efficiency of LED
Using sapphire (Al2O3) as the substrate, the influence of the parameters of patterned substrate (PS) such as pattern choice, radius and gap of primitive cell on LED efficiency is studied by software design and simulation. The results indicate that the patterned substrate structurea hemisphere structure whose radius and gap are 1.25 μm and 0.5 μm respectively is the optimal structure. Then the LED of this kind of structure is gotten by means of wet etching, and its efficiency increases by 33% compared with normal LED. The reason why the PS technology can increase LED efficiency is analysed, which is that it can improve the chip quality and increase internal quanntum efficiency.
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Huang Hongyong, Guo Zhiyou, Ye Guoguang, Liang Fubo. Influence of Patterned Substrate Parameters on Luminous Efficiency of LED[J]. Acta Optica Sinica, 2011, 31(s1): 100416
Category: Fourier optics and signal processing
Received: Mar. 2, 2011
Accepted: --
Published Online: Jun. 23, 2011
The Author Email: Hongyong Huang (hhy_2635102@163.com)