Key Laboratory for Advanced Materials Processing Technology of Education Ministry

Key Laboratory for Advanced Materials Processing Technology of Education Ministry

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Sun H.,Key Laboratory for Advanced Materials Processing Technology of Education Ministry | Wei J.,Key Laboratory for Advanced Materials Processing Technology of Education Ministry | Jia Y.,Beijing University of Chemical Technology | Cui X.,Key Laboratory for Advanced Materials Processing Technology of Education Ministry | And 2 more authors.
Nanoscale Research Letters | Year: 2014

Flexible heterojunction solar cells were fabricated from carbon nanotubes (CNTs) and mono-crystalline Si thin films at room temperature. The Si thin films with thickness less than 50 μm are prepared by chemically etching Si wafer in a KOH solution. The initial efficiency of the thin-film solar cell varies from approximately 3% to 5%. After doping with a few drops of 1 M HNO3, the efficiency increases to 6% with a short-circuit current density of 16.8 mA/cm2 and a fill factor of 71.5%. The performance of the solar cells depends on the surface state and thickness of Si thin films, as well as the interface of CNT/Si. The flexible CNT/Si thin-film solar cells exhibit good stability in bending-recovery cycles. © 2014, Sun et al.; licensee Springer.

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