Light trapping in amorphous silicon solar cells with periodic grating structures |
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| Authors: | Haihua Li Qingkang Wang Jian Chen Janez Krc Wim J Soppe |
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| Institution: | 1. National Key Laboratory of Micro /Nano Fabrication Technology, Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China;2. University of Ljubljana, Faculty of Electrical Engineering, Trzaska25, 1000 Ljubljana, Slovenia;3. Energy research Center of the Netherlands, P. O. Box 1, 1755 ZG Pettern, The Netherlands;1. Electrical Engineering Department, Semnan University, Semnan, Iran;2. Physics Department, Guilan University, Rasht, Iran;1. Institute of Electrical Engineering, SAS, Dúbravská cesta 9, SK-84104 Bratislava, Slovakia;2. Institute of Physics, ASCR, v.v.i., Cukrovarnická 10, CZ-16200 Praha 6, Czech Republic;3. Department of Physics, Faculty of Science, University of Ostrava, 30. dubna 22, CZ-70103 Ostrava 1, Czech Republic;4. C.N.R.-IMEM Institute, Parco Area delle Scienze 37/A, I-43124 Parma, Italy;5. Faculty of Electrical Engineering and Information Technology, SUT, Ilkovi?ova 3, SK-81219 Bratislava, Slovakia;1. LAAAS Department of Electronics, Mostefa Benboulaid University, Batna 2, 05000 Algeria;2. Laboratory of Metallic and Semiconducting Materials, Mohammed Kheider University, 07000 Biskra, Algeria;3. DIIES - Mediterranea University of Reggio Calabria, Loc. Feo di Vito, Reggio Calabria 89122, Italy;1. Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 300, Taiwan;2. Department of Mechatronic Engineering, National Taiwan Normal University, Taipei 106, Taiwan;3. Department of Physics, National Taiwan Normal University, Taipei 106, Taiwan |
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| Abstract: | We report on the design of amorphous silicon solar cells with the periodic grating structures. It is a combination of an anti-reflection structure and the metallic reflection grating. Optical coupling and light trapping in thin-film solar cells are studied numerically using the Rigorous Coupled Wave Analysis enhanced by the Modal Transmission Line theory. The impact of the structure parameters of the gratings is investigated. The results revealed that within the incident angles of ? 40° to + 40° the reflectivity of the cell with a period of 0.5 μm, a filling factor of 0.1 and a groove depth of 0.4 μm is 4%–22.7% in the wavelength range of 0.3–0.6 μm and 1%–20.8% in the wavelength range of 0.6–0.84 μm, the absorption enhancement of the a-Si layer is 0.4%–10.8% and 20%–385%, respectively. |
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