Open AccessInvestigation of anti-reflection properties of crystalline silicon solar cell surface silicon nanowire arrays
Author(s) -
Liang Lei,
Qian Xu,
Manli Hu,
HanDong Sun,
Xiang Guang-Hua,
Lixin Zhou
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.037301
Subject(s) - materials science , silicon , silicon solar cell , silicon nanowires , solar cell , reflection (computer programming) , crystalline silicon , surface (topology) , optoelectronics , nanowire , monocrystalline silicon , nanotechnology , optics , physics , geometry , mathematics , computer science , programming language
In order to trap more sunlight onto the crystalline silicon solar cell and improve the photo-electric conversion efficiency, it is very important to study the optical scattering properties of silicon nanowire arrays on silicon wafer. The rigorous coupled wave analysis method is used for optical simulation, and the Taguchi method is used for efficient optimization. The simulation results show that at the above-mentioned wavelengths the reflectance of the optimized structure is less than 2%, and also able to achieve the wide-angle antireflection. At room temperature and ambient pressure, the silicon nanowire arrays each with a period of 50 nm, duty ratio of 0.6 and height of 1000 nm are successfully prepared on mono-crystalline Si wafers using a novel metal-catalyzed chemical etching technique, the reflectance test results are consistent with simulation values. The average reflectance of the optimized structure over the above-mentioned wavelength range is 4%-5%, showing that the antireflection effect is obvious compared with the reflectivity of about 35% of the single crystal silicon. The minus reflection microstructures reduce the sun battery microstructure costs, at the same time, reduce the monocrystalline silicon surface light reflecting loss, improve the photoelectric conversion efficiency.