Improved Efficiency of Graphene/Si Heterojunction Solar Cells by Optimizing Hydrocarbon Feed Rate

Four different graphene films were synthesized via chemical vapor deposition by using acetonitrile with feed rates of 0.01, 0.02, 0.04, and 0.06 mL/min. Heterojunction solar cells were assembled by transferring as-synthesized graphene films onto n-Si. Solar cells based on graphene samples produced a...

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Bibliographic Details
Published in:Journal of nanomaterials 2014-01, Vol.2014 (2014), p.1-7
Main Authors: Kang, Feiyu, Wang, Kunlin, Zhu, Hongwei, Lv, Ruitao, Cui, Tongxiang, Zhang, Zexia, Wu, Dehai
Format: Article
Language:English
Subjects:
Electrodes
Energy conversion efficiency
Feed rate
Graphene
Heterojunctions
Investigations
Nanomaterials
Photovoltaic cells
Silicon
Solar cells
Solar energy
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Summary:Four different graphene films were synthesized via chemical vapor deposition by using acetonitrile with feed rates of 0.01, 0.02, 0.04, and 0.06 mL/min. Heterojunction solar cells were assembled by transferring as-synthesized graphene films onto n-Si. Solar cells based on graphene samples produced at 0.01, 0.02, 0.04, and 0.06 mL/min demonstrate power conversion efficiencies of 2.26%, 2.10%, 1.02%, and 0.94%, respectively. When HNO3 was used to dope the graphene films, the corresponding photovoltaic efficiencies were increased to 4.98%, 4.19%, 2.04%, and 1.74%, respectively. Mechanism for the improved efficiency of graphene/Si heterojunction solar cells was also investigated.
ISSN:1687-4110
1687-4129
DOI:10.1155/2014/359305