Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 8, Issue 7, Pages 2085-2092Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ee00548e
Keywords
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Funding
- Ministry of Science and Technology (MOST), Taiwan [103-2119-M-002-021-MY3, 102-2119-M-002-005]
- Taiwan Consortium of Emergent Crystalline Materials (TCECM)
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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.
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