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Enhanced absorption of CdS quantum dots deposited onto ZnO nanorod by using bifunctional linker

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Abstract

We report an improved quantum dot sensitized solar cell (QDSSC) with CdS QDs deposited on the mercaptopropionic acid (MPA)-modified ZnO film by chemical bath deposition (CBD) method. Thiol group in MPA molecule can be attached to CdS, which is benefit for CdS QDs deposition on ZnO to form a well-covered film. As revealed by UV-vis absorption spectra, the increased amount of CdS QDs were deposited on MPA modified ZnO. A power conversion efficiency of 0.70% was obtained for QDSSC based on MPA modified ZnO, which has 42% improvement than that based on bare ZnO. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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