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In this paper, the influence of different front and back grating period ratio on the optical absorption property of a dual-grating structured thin film solar cell is analyzed using finite difference time domain method. Grating height, fill factor, and thickness of silicon layer are optimized, and the resonance modes that contribute to the absorption enhancement are studied. Results show that light leakage effect exists in the conformal grating structure with grating period ratio of 1:1, the structure with grating period ratio deviating from 1:1 suppresses the light leakage from the silicon active layer. The effective excitation and propagation of waveguide modes in the silicon active layer play an important role in the absorption enhancement of the structure with the front grating period smaller than the back grating period, while the excitation and propagation of the plasmonic modes in the active layer dominate the absorption enhancement of the structure with the front grating period larger than the back grating period. The light leakage effect also exists in the structure with grating period ratio of 1:2 and 1:3 when the silicon active layer is thick. As a result, the structure with the best absorption property deviates from the structures with these grating period ratios.
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Keywords:
- thin film solar cell /
- light trapping /
- finite difference time domain /
- dual grating period
[1] Nguyen-Huu N, Cada M, Pištora J 2014 Opt. Express 22 A68
[2] Liu B F, Bai L S, Wei C C, Sun J, Hou G F, Zhao Y, Zhang X D 2013 Acta Phys. Sin. 62 208801(in Chinese) [刘伯飞, 白立沙, 魏长春, 孙建, 侯国付, 赵颖, 张晓丹 2013 62 208801]
[3] Jia H X, Luo L, Li B L, Xu Z H, Ren X K, Jiang Y S, Cheng L, Zhang C Y 2013 Acta Phys. Sin 62 168802(in Chinese) [贾河顺, 罗磊, 李秉霖, 徐振华, 任现坤, 姜言森, 程亮, 张春艳 2013 62 168802]
[4] Jia Z N, Z X D, Liu Y, Wang F, Fan J, Liu C C, Zhao Y 2014 Chin. Phys. B 23 046106
[5] Meng X, Drouard E, Gomard G, Peretti R, Fave A, Seassal C 2012 Opt. Express 20 A560
[6] Deceglie M G, Ferry V E, Alivisatos A P, Atwater H A 2012 Nano Lett. 12 2894
[7] Haase C, Stiebig H 2006 Progress in Photovoltaics: Research and Applications 14 629
[8] Chriki R, Yanai A, Shappir J, Levy U 2013 Opt. Express 21 A382
[9] Biswas R, Xu C 2011 Opt. Express 19 A664
[10] Ferry V E, Polman A, Atwater H A 2011 ACS Nano 5 10055
[11] Madzharov D, Dewan R, Knipp D 2011 Opt. Express 19 A95
[12] Rahul D, Stefan F, Meyer-Rochow V B, Yasemin Ö, Saeed H, Dietmar K 2012 Bioinspir. Biomim. 7 16003
[13] Wang K X, Yu Z, Liu V, Cui Y, Fan S 2012 Nano Letters 12 1616
[14] Abass A, Le K Q, Alù, Burgelman M, Maes B 2012 Physical Review B 85 115449
[15] Heine C, Morf R H 1995 Appl. Opt. 34 2476
[16] Palik E D 1985 Handbook of Optical Constants of Solids (Orlando: Academic Press) pp571–573
[17] Lumerical FDTD solution, Lumerical.inc www.lumeri-cal.com/[2014-2-5]
[18] Chao C C, Wang C M, Chang J Y 2010 Opt. Express 18 11763
[19] Ferry V E, Sweatlock L A, Pacifici D, Atwater H A 2008 Nano Lett. 8 4391
[20] Abass A, Shen H, Bienstman P, Maes B 2011 J. Appl. Phys. 109 023111
[21] Xiang C P, Liu J T, Xu B Z, Wang W M, Wei X, Song G F, Xu Yun 2014 Chin. Phys. B 23 38803
[22] Raether H 1988 Surface plasmons on smooth and rough surfaces and on gratings (New York: Springer) pp4–6
[23] Hoop T d 1959 Appl. Sci. Res. 8 135
[24] Xia Z H, Wu Y G, Liu R C, Liang Z M, Zhou J, Tang P L 2013 Opt. Express 21 A548
[25] Schuster C S, Kowalczewski P, Martins E R, Patrini M, Scullion M G, Liscidini M, Lewis L, Reardon C, Andreani L C, Krauss T F 2013 Opt. Express 21 A433
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[1] Nguyen-Huu N, Cada M, Pištora J 2014 Opt. Express 22 A68
[2] Liu B F, Bai L S, Wei C C, Sun J, Hou G F, Zhao Y, Zhang X D 2013 Acta Phys. Sin. 62 208801(in Chinese) [刘伯飞, 白立沙, 魏长春, 孙建, 侯国付, 赵颖, 张晓丹 2013 62 208801]
[3] Jia H X, Luo L, Li B L, Xu Z H, Ren X K, Jiang Y S, Cheng L, Zhang C Y 2013 Acta Phys. Sin 62 168802(in Chinese) [贾河顺, 罗磊, 李秉霖, 徐振华, 任现坤, 姜言森, 程亮, 张春艳 2013 62 168802]
[4] Jia Z N, Z X D, Liu Y, Wang F, Fan J, Liu C C, Zhao Y 2014 Chin. Phys. B 23 046106
[5] Meng X, Drouard E, Gomard G, Peretti R, Fave A, Seassal C 2012 Opt. Express 20 A560
[6] Deceglie M G, Ferry V E, Alivisatos A P, Atwater H A 2012 Nano Lett. 12 2894
[7] Haase C, Stiebig H 2006 Progress in Photovoltaics: Research and Applications 14 629
[8] Chriki R, Yanai A, Shappir J, Levy U 2013 Opt. Express 21 A382
[9] Biswas R, Xu C 2011 Opt. Express 19 A664
[10] Ferry V E, Polman A, Atwater H A 2011 ACS Nano 5 10055
[11] Madzharov D, Dewan R, Knipp D 2011 Opt. Express 19 A95
[12] Rahul D, Stefan F, Meyer-Rochow V B, Yasemin Ö, Saeed H, Dietmar K 2012 Bioinspir. Biomim. 7 16003
[13] Wang K X, Yu Z, Liu V, Cui Y, Fan S 2012 Nano Letters 12 1616
[14] Abass A, Le K Q, Alù, Burgelman M, Maes B 2012 Physical Review B 85 115449
[15] Heine C, Morf R H 1995 Appl. Opt. 34 2476
[16] Palik E D 1985 Handbook of Optical Constants of Solids (Orlando: Academic Press) pp571–573
[17] Lumerical FDTD solution, Lumerical.inc www.lumeri-cal.com/[2014-2-5]
[18] Chao C C, Wang C M, Chang J Y 2010 Opt. Express 18 11763
[19] Ferry V E, Sweatlock L A, Pacifici D, Atwater H A 2008 Nano Lett. 8 4391
[20] Abass A, Shen H, Bienstman P, Maes B 2011 J. Appl. Phys. 109 023111
[21] Xiang C P, Liu J T, Xu B Z, Wang W M, Wei X, Song G F, Xu Yun 2014 Chin. Phys. B 23 38803
[22] Raether H 1988 Surface plasmons on smooth and rough surfaces and on gratings (New York: Springer) pp4–6
[23] Hoop T d 1959 Appl. Sci. Res. 8 135
[24] Xia Z H, Wu Y G, Liu R C, Liang Z M, Zhou J, Tang P L 2013 Opt. Express 21 A548
[25] Schuster C S, Kowalczewski P, Martins E R, Patrini M, Scullion M G, Liscidini M, Lewis L, Reardon C, Andreani L C, Krauss T F 2013 Opt. Express 21 A433
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