Modification of surface morphology of a textured silicon substrate and its application in heterojunction solar cells

Zhao Zhen-Yue; Zhang Xiao-Dan; Wang Feng-You; Jiang Yuan-Jian; Du Jian; Gao Hai-Bo; Zhao Ying; Liu Cai-Chi

doi:10.7498/aps.63.136802

Abstract

Texture on a mono-crystalline silicon substrate can effectively enhance the light trapping, and increase the short-circuit current of silicon hetero-junction solar cell. However, when the amorphous silicon layer deposited on the crystalline silicon substrate, the amorphous and crystalline epitaxial growth of mixed phases is created in the valleys with sharp edges, which leads to reducing the output characteristic parameters of the solar cell. In this paper, we use two methods to modify the microstructure of the textured substrate, and apply them to the silicon heterojunction solar cell. The textured silicon substrate is smoothed through the mixed acid, which makes the pyramid shape become round off and the open circuit voltage of the solar cell change from 564.6 mV to 609.4 mV. In addition, we use tetramethyl ammonium hydroxide (TMAH) instead of alkali solution. It is found that the textured substrate has an effective light trapping, and its micro-morphology is more rounded, the short-circuit current and open circuit voltage of the solar cell have been improved significantly.

Keywords:

Authors and contacts

1.
Institute of Photo-Electronic Thin Film Devices and Technology of Nankai University, the Key Laboratory of Optoelectronic Thin Film Devices and Technology of Tianjin City, The Key Laboratory of Optoelectronic Information Technical Science of Ministry of Education, Tianjin 300071, China;
2.
Institute of Information Functional Material of Hebei University of Technology, Tianjin 300130, China
Funds: Project supported by the State Key Development Program for Basic Research of China (Grant Nos. 2011CBA00706, 2011CBA00707), the National High Technology Research and Development Program of China (Grant No. 2013AA050302), the Tianjin Science and Technology Support Project (Grant No. 12ZCZDGX03600), the Major Science and Technology Support Project in Tianjin(Grant No. 11TXSYGX22100), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120031110039).

References

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[4]	Olibet S, Vallat S E, Fesquet L, Monachon C, Hessler W A, Damon L J, Wolf S D, Ballif C 2010 Phys. Status Solidi A 207 651
[5]	Zhang Y, Zhou Y Q, Jiang Z Y, Liu F Z, Zhu M F 2010 Phys. Status Solidi C 7 1025
[6]	Tian J T, Feng S M, Wang K X, Xu H T, Yang S Q, Liu F, Huang J H, Pei J 2012 Acta Phys. Sin. 61 066803 (in Chinese) [田嘉彤, 冯仕猛, 王坤霞, 徐华天, 杨树泉, 刘峰, 黄建华, 裴俊 2012 物理学报 61 066803]
[7]	Bachtouli N, Aouida S, Hadj L. R, Boujmil M. F, Bessais B 2012 Applied Surface Science 258 8889
[8]	Edwards M, Bowden S, Das U, Burrows M 2008 Sol. Energy Mater. Sol. Cells 92 1373
[9]	Miroslav M, Juraj R, Ladislav H, Pavol G, Pavol S 2010 Applied Surface Science 256 5662
[10]	Zhou C L, Li X D, Wang W J, Zhao L, Li H L, Diao H W, Cao X N 2011 Acta Phys. Sin. 60 038201 (in Chinese) [周春兰, 励旭东, 王文静, 赵雷, 李海玲, 刁宏伟, 曹晓宁 2011 物理学报 60 038201]
[11]	Angermann H, Korte L, Rappich J, Conrad E, Sieber I, Schmidt M, Hbener K, Hauschild J 2008 Thin Solid Films 516 6775
[12]	Rosa M, Allegrezza M, Canino M, Summonte C, Desalvo A 2011 Solar Energy Materials & Solar Cells 95 2987
[13]	Shikida M, Sato K, Tokoro K, Uchikawa D 2000 Sensors and Actuators A 80 179
[14]	Kang M G, Tark S, Lee J C, Son C S, Kim D 2011 Journal of Crystal Growth 326 14

Cited By

[1]	Dwivedi N, Kumar S, Bisht A, Patel K, Sudhaka S 2013 Solar Energy 88 31
[2]	Qu S, Zhang X W, Mao H H, Yu Y X, Han Z H, Tang Y H, Zhou C L, Wang W J 2011 Materials Review 25 10 (in Chinese) [屈盛, 张兴旺, 毛和璜, 余银祥, 韩增华, 汤叶华, 周春兰, 王文静 2011 材料导报 25 10]
[3]	Zhou C L, Wang W J, Zhao L, Li H L, Diao H W, Cao X N 2010 Acta Phys. Sin. 59 5777 (in Chinese)[周春兰, 王文静, 赵雷, 李海玲, 刁宏伟, 曹晓宁 2010 物理学报 59 5777]
[4]	Olibet S, Vallat S E, Fesquet L, Monachon C, Hessler W A, Damon L J, Wolf S D, Ballif C 2010 Phys. Status Solidi A 207 651
[5]	Zhang Y, Zhou Y Q, Jiang Z Y, Liu F Z, Zhu M F 2010 Phys. Status Solidi C 7 1025
[6]	Tian J T, Feng S M, Wang K X, Xu H T, Yang S Q, Liu F, Huang J H, Pei J 2012 Acta Phys. Sin. 61 066803 (in Chinese) [田嘉彤, 冯仕猛, 王坤霞, 徐华天, 杨树泉, 刘峰, 黄建华, 裴俊 2012 物理学报 61 066803]
[7]	Bachtouli N, Aouida S, Hadj L. R, Boujmil M. F, Bessais B 2012 Applied Surface Science 258 8889
[8]	Edwards M, Bowden S, Das U, Burrows M 2008 Sol. Energy Mater. Sol. Cells 92 1373
[9]	Miroslav M, Juraj R, Ladislav H, Pavol G, Pavol S 2010 Applied Surface Science 256 5662
[10]	Zhou C L, Li X D, Wang W J, Zhao L, Li H L, Diao H W, Cao X N 2011 Acta Phys. Sin. 60 038201 (in Chinese) [周春兰, 励旭东, 王文静, 赵雷, 李海玲, 刁宏伟, 曹晓宁 2011 物理学报 60 038201]
[11]	Angermann H, Korte L, Rappich J, Conrad E, Sieber I, Schmidt M, Hbener K, Hauschild J 2008 Thin Solid Films 516 6775
[12]	Rosa M, Allegrezza M, Canino M, Summonte C, Desalvo A 2011 Solar Energy Materials & Solar Cells 95 2987
[13]	Shikida M, Sato K, Tokoro K, Uchikawa D 2000 Sensors and Actuators A 80 179
[14]	Kang M G, Tark S, Lee J C, Son C S, Kim D 2011 Journal of Crystal Growth 326 14

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