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Issue 7, 2015
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Sunlight-activated graphene-heterostructure transparent cathodes: enabling high-performance n-graphene/p-Si Schottky junction photovoltaics

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Abstract

Compared to widely-reported graphene-based anodes, the task of obtaining a stable graphene-based cathode is generally more difficult to achieve because n-type graphene devices have very limited thermal and chemical stabilities, and are usually sensitive to the influence of the ambient environment. This work developed a novel “sunlight-activated” graphene-heterostructure transparent electrode in which photogenerated charges from a light-absorbing material are transferred to graphene, resulting in the modulation of electrical properties of the graphene transparent electrode caused by a strong light–matter interaction at graphene-heterostructure interfaces. A photoactive graphene/TiOx-heterostructure transparent cathode was used to fabricate an n-graphene/p-Si Schottky junction solar cell, achieving a record-high power conversion efficiency (>10%). The photoactive graphene-heterostructure transparent electrode, which exhibits excellent tunable electrical properties under sunlight illumination, has great potential for use in the future development of graphene-based photovoltaics and optoelectronics.

Graphical abstract: Sunlight-activated graphene-heterostructure transparent cathodes: enabling high-performance n-graphene/p-Si Schottky junction photovoltaics

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Publication details

The article was received on 17 Feb 2015, accepted on 06 May 2015 and first published on 18 May 2015


Article type: Paper
DOI: 10.1039/C5EE00548E
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Citation: Energy Environ. Sci., 2015,8, 2085-2092

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    Sunlight-activated graphene-heterostructure transparent cathodes: enabling high-performance n-graphene/p-Si Schottky junction photovoltaics

    P. Ho, W. Lee, Y. Liou, Y. Chiu, Y. Shih, C. Chen, P. Su, M. Li, H. Chen, C. Liang and C. Chen, Energy Environ. Sci., 2015, 8, 2085
    DOI: 10.1039/C5EE00548E

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