Effective Light Absorptive Layer Using Mezo-Porous Silicon by Electrochemical Etching
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概要
- 論文の詳細を見る
Porous silicon (PS), an excellent light diffuser, can be used as an antireflective layer that does not need to be coated with other antireflection coating (ARC) materials. PS layers were obtained by electrochemical etching (ECE) anodization of silicon wafers in hydrofluoric acid/ethanol/deionized (DI) water solution (HF/EtOH/H2O). This technique selectively removes Si atoms from the sample surface, forming a PS layer with adjustable optical, electrical, and mechanical properties. A PS layer with optimal antireflection characteristics was obtained for a charge density ($Q$) of 5.2 C/cm2. The weighted reflectance was reduced from 24 to 4% in the wavelength range from 400 to 1000 nm. The weighted reflectance with optimized PS layers is much less than that with a commercial SiNX ARC on a potassium hydroxide (KOH) pretextured multicrystalline silicon (mc-Si) surface. Therefore, it can be successfully used as an alternative way for the preparation of a PS antireflective layer for a silicon solar cell.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-04-15
著者
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Ju Byeong-kwon
School Of Electrical Engineering College Of Engineering Korea University
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Ju Byeong-Kwon
School of Electrical Engineering, College of Engineering Korea University, Seoul 136-701, Korea
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Kwon Jae-Hong
School of Electrical Engineering, College of Engineering Korea University, Seoul 136-701, Korea
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Lee Soo-Hong
Strategic Energy Research Institute, Sejong University, Seoul 143-747, Korea
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