Absorption Enhancement of Ultrathin Crystalline Silicon Solar Cells with Dielectric Si_3N_4 Nanostructures |
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| Authors: | Xin-Yu Tan Lei Sun Guo-Rong Zhang Can Deng Yi-Teng Tu Li Guan |
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| Affiliation: | 1. China Three Gorges University, College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, Yichang 443002, China;2. Department of Physics Science and Technology, Hebei University, Baoding 071000, China;3. College of Electrical Engineering & New Energy, Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, Yichang 443002, China |
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| Abstract: | ![]()
A design of ultrathin crystalline silicon solar cell with Si3 N4 circular truncated cone holes(CTCs) arrays on the top is proposed. In this article, we perform an optical simulation of the structure. The finite-difference time-domain method is used to calculate the optical absorption of different periods, radius of top and bottom circles and depth of Si3 N4 CTCs. The short-circuit current density generated by the optimized cells(30.17 mA/cm~2) is 32.44% more than the value gained by control group(with flat Si3 N4). Then adding a layer of back silver to allow us to better analyze optical absorption. Later, we simulate the optimization of the same configuration of different silicon thicknesses andfind that our structure does enhance the light absorption. This work uses a combined path towards achieving higher photocurrent ultrathin crystalline silicon solar cells by constructing the texture of anti-reflection coating. |
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| Keywords: | photovoltaic silicon diffraction gratings antireflection coatings |
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