Skip to main content

Research Repository

Advanced Search

Ni Mg Mixed Metal Oxides for p-Type Dye-Sensitized Solar Cells

Zannotti, Marco; Wood, Christopher J.; Summers, Gareth H.; Stevens, Lee A.; Hall, Matthew R.; Snape, Colin E.; Giovannetti, Rita; Gibson, Elizabeth A.

Authors

Marco Zannotti

Christopher J. Wood

Gareth H. Summers

Lee A. Stevens

Matthew R. Hall

Colin E. Snape

Rita Giovannetti

Elizabeth A. Gibson



Abstract

Mg Ni mixed metal oxide photocathodes have been prepared by a mixed NiCl2/MgCl2 sol-gel process. The MgO/NiO electrodes have been extensively characterized using physical and electrochemical methods. Dye-sensitized solar cells have been prepared from these films and the higher concentrations of MgO improved the photovoltage of these devices, however, there was a notable drop in photocurrent with increasing Mg2+. Charge extraction and XPS experiments revealed that the cause of this was a positive shift in the energy of the valence band which decreased the driving force for electron transfer from the NiO film to the dye and therefore the photocurrent. In addition, increasing concentrations of MgO increases the volume of pores between 0.500 to 0.050 μm, while reducing pore volumes in the mesopore range (less than 0.050 μm) and lowering BET surface area from approximately 41 down to 30 m2 g-1. A MgO concentration of 5% was found to strike a balance between the increased photovoltage and decreased photocurrent, possessing a BET surface area of 35 m2 g-1 and a large pore volume in both the meso and macropore range, which lead to a higher overall power conversion efficiency than NiO alone.

Journal Article Type Article
Publication Date Oct 15, 2015
Journal ACS Applied Materials & Interfaces
Print ISSN 1944-8244
Electronic ISSN 1944-8252
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 7
Issue 44
Pages 24556-24565
APA6 Citation Giovanetti, R., Zannotti, M., Wood, C. J., Summers, G. H., Stevens, L. A., Hall, M. R., …Gibson, E. A. (2015). Ni Mg Mixed Metal Oxides for p-Type Dye-Sensitized Solar Cells. ACS Applied Materials and Interfaces, 7(44), 24556-24565. https://doi.org/10.1021/acsami.5b06170
DOI https://doi.org/10.1021/acsami.5b06170
Keywords Dye-sensitized solar cells, nickel oxide, p-type, photocathode, artificial photosynthesis
Publisher URL http://pubs.acs.org/doi/abs/10.1021/acsami.5b06170
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc/4.0
Additional Information This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © 2015 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acsami.5b06170

Files

Mg_NiO_resubmitted.pdf (1.4 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc/4.0





You might also like



Downloadable Citations

;