Journal
NANO LETTERS
Volume 11, Issue 5, Pages 1901-1905Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl2002632
Keywords
Carbon nanotube; solar cell; acid doping; photoelectrochemical cells
Categories
Funding
- 863 Program [2009AA0-SZ423]
- National Science Foundation of China (NSFC) [50972067, 51072005]
- Ministry of Education of China [20090002120019]
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Various approaches to improve the efficiency of solar cells have followed the integration of nanomaterials into Si-based photovoltaic devices. Here, we achieve 13.8% efficiency solar cells by combining carbon nanotubes and Si and doping with dilute HNO3. Acid infiltration of nanotube networks significantly boost the cell efficiency by reducing the internal resistance that improves fill factor and by forming photoelectrochemical units that enhance charge separation and transport. Compared to conventional Si cells, the fabrication process is greatly simplified, simply involving the transfer of a porous semiconductor-rich nanotube film onto an n-type crystalline Si wafer followed by acid infiltration.
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