Open Access NANO EXPRESS

Au Nanoparticles as Interfacial Layer for CdS Quantum Dot-sensitized Solar Cells

Guang Zhu, Fengfang Su, Tian Lv, Likun Pan* and Zhuo Sun

Author affiliations

Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, Department of Physics, East China Normal University, Shanghai, China

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Citation and License

Nanoscale Research Letters 2010, 5:1749-1754  doi:10.1007/s11671-010-9705-z

Published: 28 July 2010

Abstract

Quantum dot-sensitized solar cells based on fluorine-doped tin oxide (FTO)/Au/TiO2/CdS photoanode and polysulfide electrolyte are fabricated. Au nanoparticles (NPs) as interfacial layer between FTO and TiO2 layer are dip-coated on FTO surface. The structure, morphology and impedance of the photoanodes and the photovoltaic performance of the cells are investigated. A power conversion efficiency of 1.62% has been obtained for FTO/Au/TiO2/CdS cell, which is about 88% higher than that for FTO/TiO2/CdS cell (0.86%). The easier transport of excited electron and the suppression of charge recombination in the photoanode due to the introduction of Au NP layer should be responsible for the performance enhancement of the cell.

Keywords:
Quantum dot-sensitized solar cell; Gold nanoparticles; Interfacial layer