Characterization of the nanosized porous structure of black Si solar cells fabricated via a screen printing process

Tang Yehua; Zhou Chunlan; Wang Wenjing; Zhou Su; Zhao Yan; Zhao Lei; Li Hailing; Yan Baojun; Chen Jingwei; Fei Jianming; Cao Hongbin

doi:10.1088/1674-4926/33/6/064007

J. Semicond. > 2012, Volume 33 > Issue 6 > 064007

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Characterization of the nanosized porous structure of black Si solar cells fabricated via a screen printing process

Tang Yehua, Zhou Chunlan, Wang Wenjing, Zhou Su, Zhao Yan, Zhao Lei, Li Hailing, Yan Baojun, Chen Jingwei, Fei Jianming and Cao Hongbin

+ Author Affiliations

Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
Eoplly New Energy Technology Co., Ltd., Nantong 226602, China
Eoplly New Energy Technology Co., Ltd., Nantong 226602, China

DOI: 10.1088/1674-4926/33/6/064007

Abstract: A silicon (Si) surface with a nanosized porous structure was formed via simple wet chemical etching catalyzed by gold (Au) nanoparticles on p-type Cz-Si (100). The average reflectivity from 300 to 1200 nm was less than 1.5%. Black Si solar cells were then fabricated using a conventional production process. The results reflected the output characteristics of the cells fabricated using different etching depths and emitter dopant profiles. Heavier dopants and shallower etching depths should be adopted to optimize the black Si solar cell output characteristics. The efficiency at the optimized etching time and dopant profile was 12.17%. However, surface passivation and electrode contact due to the nanosized porous surface structure are still obstacles to obtaining high conversion efficiency for the black Si solar cells.

Key words: black silicon, noble metal nanoparticles, catalysis, nanosized porous, solar cells

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Tang Yehua, Zhou Chunlan, Wang Wenjing, Zhou Su, Zhao Yan, Zhao Lei, Li Hailing, Yan Baojun, Chen Jingwei, Fei Jianming, Cao Hongbin. Characterization of the nanosized porous structure of black Si solar cells fabricated via a screen printing process[J]. Journal of Semiconductors, 2012, 33(6): 064007. doi: 10.1088/1674-4926/33/6/064007

Tang Y H, Zhou C L, Wang W J, Zhou S, Zhao Y, Zhao L, Li H L, Yan B J, Chen J W, Fei J M, Cao H B. Characterization of the nanosized porous structure of black Si solar cells fabricated via a screen printing process[J]. J. Semicond., 2012, 33(6): 064007. doi: 10.1088/1674-4926/33/6/064007.

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Received: 20 August 2015 Revised: 27 December 2011 Online: Published: 01 June 2012

A silicon (Si) surface with a nanosized porous structure was formed via simple wet chemical etching catalyzed by gold (Au) nanoparticles on p-type Cz-Si (100). The average reflectivity from 300 to 1200 nm was less than 1.5%. Black Si solar cells were then fabricated using a conventional production process. The results reflected the output characteristics of the cells fabricated using different etching depths and emitter dopant profiles. Heavier dopants and shallower etching depths should be adopted to optimize the black Si solar cell output characteristics. The efficiency at the optimized etching time and dopant profile was 12.17%. However, surface passivation and electrode contact due to the nanosized porous surface structure are still obstacles to obtaining high conversion efficiency for the black Si solar cells.

Characterization of the nanosized porous structure of black Si solar cells fabricated via a screen printing process

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