Enhanced photoelectrochemical response of Zn-dotted hematite

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Abstract

Photoelectrochemical response of thin films of α -Fe 2 O3, Zn doped α -Fe 2 O3, and Zn dots deposited on doped α -Fe 2 O3 prepared by spray pyrolysis has been studied. Samples of Zn dots were prepared using thermal evaporation method by evaporating Zn through a mesh having pore diameter of 0.7 mm. The presence of Zn-dotted islands on doped α -Fe 2 O3 surface exhibited significantly large photocurrent density as compared to other samples. An optimum thickness of Zn dots ∼230 is found to give enhanced photoresponse. The observed results are analyzed with the help of estimated values of resistivity, band gap, flatband potential, and donor density.

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Kumari, S., Singh, A. P., Tripathi, C., Chauhan, D., Dass, S., Shrivastav, R., … Satsangi, V. R. (2007). Enhanced photoelectrochemical response of Zn-dotted hematite. International Journal of Photoenergy, 2007. https://doi.org/10.1155/2007/87467

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