Journal article
Solution-processed sintered nanocrystal solar cells via layer-by-layer assembly
J Jasieniak, BI MacDonald, SE Watkins, P Mulvaney
Nano Letters | Published : 2011
DOI: 10.1021/nl201282v
Abstract
Solar cells made by high temperature and vacuum processes from inorganic semiconductors are at a perceived cost disadvantage when compared with solution-processed systems such as organic and dye-sensitized solar cells. We demonstrate that totally solution processable solar cells can be fabricated from inorganic nanocrystal inks in air at temperature as low as 300 °C. Focusing on a CdTe/ZnO thin-film system, we report solar cells that achieve power conversion efficiencies of 6.9% with greater than 90% internal quantum efficiency. In our approach, nanocrystals are deposited from solution in a layer-by-layer process. Chemical and thermal treatments between layers induce large scale grain format..
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Grants
Awarded by Australian Research Council
Funding Acknowledgements
The authors declare that they have no competing financial interests. This work was funded through the Flexible Electronics Theme of the CSIRO Future Manufacturing Flagship as part of an Office of the Chief Executive Postdoctoral Fellowship to J.J. B.I.M. wishes to acknowledge the University of Melbourne for MIFRS and MRS scholarships and CSIRO for a Ph.D. studentship. P.M. acknowledges support through DP0985325 and FF0561486. All authors would like to extend thanks to Dr. A. Mona for fruitful discussions. In addition, the authors would like to thank Dr. Matteo Altissimo who is part of the Melbourne Centre for Nanofabrication (MCN) for help in attaining SEM characterization of devices. The MCN is a initiative partly funded by the Commonwealth of Australia and the Victorian Government. Correspondence and requests for materials should be addressed toil (email Jacek.Jasieniak@csiro.au) or P.M. (email mulvaney@unimelb.edu.au).