Using autocloning effects to develop broad-bandwidth, omnidirectional antireflection structures for silicon solar cells

作者：Lee Y C^*; Tseng S C; Chen H L; Yu C C; Cheng W L; Du C H; Lin C H

来源：Optics Express, 2010, 18(19): A421-A431.

In this study, we used the autocloning effect on pyramid structures to develop broad-bandwidth, omnidirectional antireflection structures for silicon solar cells. The angular dependence of reflectance on several pyramid structures was systematically investigated. The deposition of three-layer autocloned films reduced the refractive index gap between air and silicon, resulting in an increase in the amount of transmitted light and a decrease in the total light escaping. The average reflectance decreased dramatically to ca. 2-3% at incident angles from 0 to 60 degrees for both sub-wavelength- and micrometer-scale pyramid structures. The measured reflectance of the autocloned structure was less than 4% in the wavelength range from 400 to 1000 nm for incident angles from 0 to 60 degrees. Therefore, the autocloning technique, combined with optical thin films and optical gradient structures, is a practical and compatible method for the fabrication of broad-bandwidth, omnidirectional antireflection structures on silicon solar cells.

• 出版日期2010-9-13
• 单位清华大学