Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening

Baodong Mao, Qingfeng Dong, Zhengguo Xiao, Chris Exstrom, Scott A Darveau, Thomas E. Webber, Bjorn D. Lund, Hui Huang, Zhenhui Kang, Jinsong Huang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Iron pyrite (FeS 2 ) 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 FeS 2 nanocrystals (NCs). A significant amount of zinc up to 6 at%, 30 times higher than previously reported, was incorporated into the FeS 2 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 FeS 2 photoconductor was observed and should ascribe to the increased band gap.

Original languageEnglish (US)
Pages (from-to)12060-12065
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number39
DOIs
StatePublished - Oct 21 2013

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Pyrites
Nanocrystals
Zinc
Energy gap
Alloying
Photoconducting materials
Bending (forming)
Dark currents
Costs

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening. / Mao, Baodong; Dong, Qingfeng; Xiao, Zhengguo; Exstrom, Chris; Darveau, Scott A; Webber, Thomas E.; Lund, Bjorn D.; Huang, Hui; Kang, Zhenhui; Huang, Jinsong.

In: Journal of Materials Chemistry A, Vol. 1, No. 39, 21.10.2013, p. 12060-12065.

Research output: Contribution to journalArticle

Mao, B, Dong, Q, Xiao, Z, Exstrom, C, Darveau, SA, Webber, TE, Lund, BD, Huang, H, Kang, Z & Huang, J 2013, 'Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening', Journal of Materials Chemistry A, vol. 1, no. 39, pp. 12060-12065. https://doi.org/10.1039/c3ta11039g
Mao, Baodong ; Dong, Qingfeng ; Xiao, Zhengguo ; Exstrom, Chris ; Darveau, Scott A ; Webber, Thomas E. ; Lund, Bjorn D. ; Huang, Hui ; Kang, Zhenhui ; Huang, Jinsong. / Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening. In: Journal of Materials Chemistry A. 2013 ; Vol. 1, No. 39. pp. 12060-12065.
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