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Title: Band Gap Reduction of ZnO for Photoelectrochemical Splitting of Water

Abstract

We combine first-principles density functional theory, material synthesis and characterization, and photoelectrochemical (PEC) measurements to explore methods to effectively reduce the band gap of ZnO for the application of PEC water splitting. We find that the band gap reduction of ZnO can be achieved by N and Cu incorporation into ZnO. We have successfully synthesized ZnO:N thin films with various reduced band gaps by reactive RF magnetron sputtering. We further demonstrate that heavy Cu-incorporation lead to both p-type doping and band gap significantly reduced ZnO thin films. The p-type conductivity in our ZnO:Cu films is clearly revealed by Mott-Schottky plots. The band gap reduction and photoresponse with visible light for N- and Cu-incorporated ZnO thin films are demonstrated.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
982279
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Solar Hydrogen and Nanotechnology II; Proceedings of the SPIE, Vol. 6650
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; DENSITY; FILMS; FUNCTIONALS; HYDROGEN; MAGNETRONS; MATERIALS; PROCEEDINGS; REDUCTION; SPUTTERING; SYNTHESIS; THIN FILMS; VISIBLE RADIATION; WATER; ZINC OXIDES; Solar Energy - Photovoltaics

Citation Formats

Yan, Y., Ahn, K.-S., Shet, S., Deutsch, T., Huda, M., Wei, S. H., Turner, J., and Al-Jassim, M. M.. Band Gap Reduction of ZnO for Photoelectrochemical Splitting of Water. United States: N. p., 2007. Web. doi:10.1117/12.734950.
Yan, Y., Ahn, K.-S., Shet, S., Deutsch, T., Huda, M., Wei, S. H., Turner, J., & Al-Jassim, M. M.. Band Gap Reduction of ZnO for Photoelectrochemical Splitting of Water. United States. doi:10.1117/12.734950.
Yan, Y., Ahn, K.-S., Shet, S., Deutsch, T., Huda, M., Wei, S. H., Turner, J., and Al-Jassim, M. M.. Mon . "Band Gap Reduction of ZnO for Photoelectrochemical Splitting of Water". United States. doi:10.1117/12.734950.
@article{osti_982279,
title = {Band Gap Reduction of ZnO for Photoelectrochemical Splitting of Water},
author = {Yan, Y. and Ahn, K.-S. and Shet, S. and Deutsch, T. and Huda, M. and Wei, S. H. and Turner, J. and Al-Jassim, M. M.},
abstractNote = {We combine first-principles density functional theory, material synthesis and characterization, and photoelectrochemical (PEC) measurements to explore methods to effectively reduce the band gap of ZnO for the application of PEC water splitting. We find that the band gap reduction of ZnO can be achieved by N and Cu incorporation into ZnO. We have successfully synthesized ZnO:N thin films with various reduced band gaps by reactive RF magnetron sputtering. We further demonstrate that heavy Cu-incorporation lead to both p-type doping and band gap significantly reduced ZnO thin films. The p-type conductivity in our ZnO:Cu films is clearly revealed by Mott-Schottky plots. The band gap reduction and photoresponse with visible light for N- and Cu-incorporated ZnO thin films are demonstrated.},
doi = {10.1117/12.734950},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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