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PbS/CdS Core/Shell Nanocrystals For Solution-Processed Colloidal Quantum Dot Solar Cells

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An epitaxial shell of cadmium sulphide is grown on lead sulphide quantum dots in order to reduce the concentration of surface defects. Thin solid films of these core/shell materials are found to have low carrier concentrations due to effective surface passivation which reduces the number of dangling bonds. In this paper PbS/CdS is used as a quasi-intrinsic layer in p-i-n photovoltaic devices where PbS acts as the p-layer and ZnO the n-layer. By studying different permutations of these layers and the degree of PbS p-type doping by annealing we optimise fill factor and open-circuit voltage.

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Acknowledgments

We acknowledge funding from EPSRC (Platform Grant EP/F048009/1). D.C.J.N would like to thank A*STAR for PhD overseas research scholarship.

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Authors and Affiliations

  1. Department of Materials, University of Oxford, 16 Parks Road, Oxford, OX1 3PH, United Kingdom

    Darren C. J. Neo, Cheng Cheng, Hazel E. Assender & Andrew A. R. Watt

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  1. Darren C. J. Neo
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  2. Cheng Cheng
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  3. Hazel E. Assender
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  4. Andrew A. R. Watt
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Neo, D.C.J., Cheng, C., Assender, H.E. et al. PbS/CdS Core/Shell Nanocrystals For Solution-Processed Colloidal Quantum Dot Solar Cells. MRS Online Proceedings Library 1748, 7–13 (2014). https://doi.org/10.1557/opl.2014.959

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