Chin. Phys. Lett.  2017, Vol. 34 Issue (2): 028801    DOI: 10.1088/0256-307X/34/2/028801
The 18.3% Silicon Solar Cells with Nano-Structured Surface and Rear Emitter
Jun-Na Zhang, Lei Wang**, Zhun Dai, Xun Tang, You-Bo Liu, De-Ren Yang**
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027
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Abstract A nano-structured surface is formed on the pyramid structure of n-type silicon solar cells by size-controlled silver nano-particle assisted etching. Such a nano-structure creates a front average weighted reflectance of less than 2.5% in the 300–1200 nm range due to the broadband reflection suppression. The sodium hydroxide is used to obtain the low-area surface by post-etching the nano-structure, thus the severe carrier recombination associated with the nano-structured surface could be reduced. After emitter forming, screen printing and firing by means of the industrial fabrication protocol, an 18.3%-efficient nano-structured silicon solar cell with rear emitter is fabricated. The process of fabricating the solar cells matches well with industrial manufacture and shows promising prospects.
Received: 09 November 2016      Published: 25 January 2017
PACS:  88.40.jj (Silicon solar cells)  
  81.65.Cf (Surface cleaning, etching, patterning)  
  82.45.Yz (Nanostructured materials in electrochemistry)  
  84.60.Jt (Photoelectric conversion)  
Fund: Supported by the National Natural Science Foundation of China under Grant No 51532007, the Major Projects of Zhejiang Province under Grant No 2013C01037, and the Foundation of State Key Lab of Silicon Materials.
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Jun-Na Zhang, Lei Wang, Zhun Dai et al  2017 Chin. Phys. Lett. 34 028801
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Jun-Na Zhang
Lei Wang
Zhun Dai
Xun Tang
You-Bo Liu
De-Ren Yang
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