New Visible Light Absorbing Materials for Solar Fuels, Ga(Sbx)N1-x

Swathi Sunkara, Venkat Kalyan Vendra, Jacek Bogdan Jasinski, Todd Deutsch, Antonis N. Andriotis, Krishna Rajan, Madhu Menon, Mahendra Sunkara

Research output: Contribution to journalArticlepeer-review

29 Scopus Citations

Abstract

A novel visible-light-absorbing dilute alloy, Ga(Sbx)N 1-x is synthesized by metal organic chemical vapor deposition (MOCVD) for solar hydrogen production. Significant bandgap reduction of GaN, from 3.4 eV to 1.8 eV, is observed, with a low (2%) incorporation of antimonide, and the lattice expansion is in agreement with our first-principles calculations. The band edges of Ga(Sbx)N1-x are found to straddle the water redox potentials showing excellent suitability for solar water splitting.

Original languageAmerican English
Pages (from-to)2878-2882
Number of pages5
JournalAdvanced Materials
Volume26
Issue number18
DOIs
StatePublished - 2014

NREL Publication Number

  • NREL/JA-5900-62048

Keywords

  • density functional theory (DFT)
  • GaN alloys
  • photoelectrochemical water splitting
  • solar fuels

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