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Issue 39, 2013
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Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening

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Abstract

Iron pyrite (FeS2) is one of the most promising photovoltaic materials with high natural abundance and low cost but with a lower-than-optimum band gap of 0.95 eV. Here the feasibility of band gap broadening was explored by zinc alloying of FeS2 nanocrystals (NCs). A significant amount of zinc up to 6 at%, 30 times higher than previously reported, was incorporated into the FeS2 NCs. In contrast to band gap bowing predicted by first-principles calculations, a band gap enlargement of ∼0.1 eV was observed by zinc alloying. A more than five-times reduction of dark current in the zinc alloyed FeS2 photoconductor was observed and should ascribe to the increased band gap.

Graphical abstract: Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening

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Publication details

The article was received on 12 Mar 2013, accepted on 16 Jul 2013 and first published on 22 Jul 2013


Article type: Paper
DOI: 10.1039/C3TA11039G
Citation: J. Mater. Chem. A, 2013,1, 12060-12065
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    Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening

    B. Mao, Q. Dong, Z. Xiao, C. L. Exstrom, S. A. Darveau, T. E. Webber, B. D. Lund, H. Huang, Z. Kang and J. Huang, J. Mater. Chem. A, 2013, 1, 12060
    DOI: 10.1039/C3TA11039G

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