Abstract
Core/shell shaped nanorod arrays with type-II band alignment heterojunction is a promising nanobuilding block for efficient charge transfer at the interface. Here in this work, we have fabricated Ag2S quantum dots decoration on surface of vertically aligned TiO2 nanorod arrays. A modified two-step solution process is used to obtain uniform Ag2S quantum dots shell that promotes exciton dissociation at the organic/inorganic hybrid interface. Because of the enhanced charge transfer, the photovoltaic conversion efficiency shows a drastic improvement of up to 73% for the solar cell adopting TiO2/Ag2S core/shell nanorod arrays as the electron acceptor.
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