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New-type back reflectors based on one-dimensional photonic crystal (1D PC) for amorphous silicon thin film solar cells have been investigated, designed and fabricated. These 1D PCs consist of alternating amorphous Si (a-Si) and silicon dioxide (SiOx), of which the deposition process is compatible with current silicon thin film solar cells technology. Results indicate that the total reflectance of 1D PCs increases with the increase of period number. An average reflectance over 96% can be achieved in the range from 500 to 750 nm with 4 periods or more. Applying the 4-period 1D PC as back reflector in NIP amorphous silicon thin film solar cell with device-configuration of glass/1D PC/AZO/NIP a-Si:H/ITO, a conversion efficiency of 7.9% can be obtained, which is comparable to the AZO/Ag-based solar cell of 7.7% and is much better than the SS-based solar cell of 6.9% (a relative enhancement of 14.5%).
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Keywords:
- amorphous silicon thin film solar cell /
- one-dimensional photonic crystal /
- light trapping /
- back reflector
[1] Muller J, Rech B, Springer J, Vanecek M 2004 Solar Energy 77 917
[2] Sai H, Jia H, Kondo M 2010 Journal of Applied Physics 108 044505
[3] Ni J, Zhang J J, Cao Y, Wang X B, Li C, Chen X L, Geng X H, Zhao Y 2011 Chin. Phys. B 20 087309
[4] Li G J, Hou G F, Han X Y, Yuan Y J, Wei C C, Sun J, Zhao Y, Geng X H 2009 Chin. Phys. B 18 1674
[5] Yue G, Sivec L, Owens JM, Yan B, Yang J, Guha S 2009 Applied Physics Letters 95 263501
[6] Zhou DY, Biswas R 2008 Journal of Applied Physics 103 093102
[7] Akimov Y A, Koh W S 2011 Applied Physics Letters 99 063102
[8] Baba T 2008 Nature Photonics 2 465
[9] Krauss TF, De la Rue RM 1999 Progress in Quantum Electronics 23 51
[10] Bermel P, Luo C, Zeng L, Kimerling L C, Joannopoulos J D 2007 Optics Express 15 16986
[11] Biswas R, Bhattacharya J, Lewis B, Chakravarty N, Dalal V 2010 Solar Energy Materials and Solar Cells 94 2337
[12] Zeng L, Yi Y, Hong C, Liu J, Feng N, Duan X, Kimerling L C, Alamariu B A 2006 Applied Physics Letters 89 111111
[13] Zhang Y H, Qiu X J, Li H Q, Chen H 2001 Physics 30 616 (in Chinese) [张拥华, 仇新杰, 李宏强, 陈宏2001 物理 30 616]
[14] Ma X Y 2010 Principle and Aplication of Photonic crystal(Beijing:Science Press) p38 (in Chinese)[马锡英2010 光子晶体原理及其应用(北京: 科学出版社) 第38 页]
[15] Dong J W, Chen Y H, Jiang H Z 2007 Acta Phys. Sin. 56 0268 (in Chinese)[董建文, 陈溢杭, 江河洲2007 56 0268]
[16] Matsumoto Y, Melendez F, Asomoza R 2001 Solar Energy Materials and Solar Cells 66 163
[17] Yan B, Yue G, Sivec L, Yang J, Guha S, Jiang C-S 2011 Applied Physics Letters 99 113512
[18] Bermel P, Luo C, Zeng L, Kimerling LC, Joannopoulos JD 2007 Optics Express 15 16986
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[1] Muller J, Rech B, Springer J, Vanecek M 2004 Solar Energy 77 917
[2] Sai H, Jia H, Kondo M 2010 Journal of Applied Physics 108 044505
[3] Ni J, Zhang J J, Cao Y, Wang X B, Li C, Chen X L, Geng X H, Zhao Y 2011 Chin. Phys. B 20 087309
[4] Li G J, Hou G F, Han X Y, Yuan Y J, Wei C C, Sun J, Zhao Y, Geng X H 2009 Chin. Phys. B 18 1674
[5] Yue G, Sivec L, Owens JM, Yan B, Yang J, Guha S 2009 Applied Physics Letters 95 263501
[6] Zhou DY, Biswas R 2008 Journal of Applied Physics 103 093102
[7] Akimov Y A, Koh W S 2011 Applied Physics Letters 99 063102
[8] Baba T 2008 Nature Photonics 2 465
[9] Krauss TF, De la Rue RM 1999 Progress in Quantum Electronics 23 51
[10] Bermel P, Luo C, Zeng L, Kimerling L C, Joannopoulos J D 2007 Optics Express 15 16986
[11] Biswas R, Bhattacharya J, Lewis B, Chakravarty N, Dalal V 2010 Solar Energy Materials and Solar Cells 94 2337
[12] Zeng L, Yi Y, Hong C, Liu J, Feng N, Duan X, Kimerling L C, Alamariu B A 2006 Applied Physics Letters 89 111111
[13] Zhang Y H, Qiu X J, Li H Q, Chen H 2001 Physics 30 616 (in Chinese) [张拥华, 仇新杰, 李宏强, 陈宏2001 物理 30 616]
[14] Ma X Y 2010 Principle and Aplication of Photonic crystal(Beijing:Science Press) p38 (in Chinese)[马锡英2010 光子晶体原理及其应用(北京: 科学出版社) 第38 页]
[15] Dong J W, Chen Y H, Jiang H Z 2007 Acta Phys. Sin. 56 0268 (in Chinese)[董建文, 陈溢杭, 江河洲2007 56 0268]
[16] Matsumoto Y, Melendez F, Asomoza R 2001 Solar Energy Materials and Solar Cells 66 163
[17] Yan B, Yue G, Sivec L, Yang J, Guha S, Jiang C-S 2011 Applied Physics Letters 99 113512
[18] Bermel P, Luo C, Zeng L, Kimerling LC, Joannopoulos JD 2007 Optics Express 15 16986
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