Abstract
Two kinds of inorganic/organic hybrid junctions based on ZnO nanorods (NRs), i.e. two-layer planar heterojunction and embedded bulk composite structures, were fabricated on ITO glass substrates. Surface photovoltage (SPV) methods based on a Kelvin probe and a lock-in amplifier were respectively utilized to study the photogenerated charges at the surface and the interface in the ZnO-based hybrid junctions. Results indicate that the lock-in SPV response of the bulk composite structure is much higher than its planar counterpart in terms of intensity and spectral range. Therefore, ZnO NR/PF (poly(9,9-di-n-octylfluorenyl-2,7-diyl)) embedded bulk composite structures are more suitable and preferred for photovoltaic application.
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Acknowledgements
This work was supported by the National High Technology Research and Development Program of China (863 Program, No. 2011AA050516), the Science Fund of Dalian (No. 2011J21DW013) and Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.
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Kang, D., Liu, A., Bian, J. et al. Enhanced surface photovoltage response of ZnO nanorod based inorganic/organic hybrid junctions by constructing embedded bulk composite structures. Appl. Phys. A 110, 263–267 (2013). https://doi.org/10.1007/s00339-012-7314-7
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DOI: https://doi.org/10.1007/s00339-012-7314-7