Zinc alloyed iron pyrite ternary nanocrystals for band gap broadening

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

Research output: Contribution to journalArticle

17 Scopus citations

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.

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

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ASJC Scopus subject areas

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

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