Ab Initio Investigations of Electronic Structure and Optical Properties of Ag-F Codoped ZnO

Abstract:

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Motivated by the widely discussed Ag doped ZnO and the lack of follow-up reports about the realization of p-n junctions, we calculated the electronic structures and optical properties of pure, Ag-doped and Ag-F codoped ZnO based on the density-functional theory. It was found that Ag doped ZnO shows p-type conduction character. But there are some unstable factors and self-compensations in this structure. We also calcualted the formation energy and ionization energy of the impurity for Ag-F codoped ZnO. It was found that incorporating the reactive donor F into Ag doped ZnO system, not only enhances the Ag acceptor solubility, but also gets a shallower Ag acceptor energy level in the band gap. In addition, we analyze the imaginary part of the dielectric function, reflectivity and absorption coefficient for pure ZnO and Ag-F codoped ZnO. Compared with the pure ZnO, the remarkable feature for Ag-F codoped ZnO is that there is a strong absorption in the visible-light region, which indicates that it could be taken as a potential candidate for a photocatalytic material.

Info:

Periodical:

Advanced Materials Research (Volumes 152-153)

Edited by:

Zhengyi Jiang, Jingtao Han and Xianghua Liu

Pages:

1097-1102

DOI:

10.4028/www.scientific.net/AMR.152-153.1097

Citation:

J. Wen et al., "Ab Initio Investigations of Electronic Structure and Optical Properties of Ag-F Codoped ZnO", Advanced Materials Research, Vols. 152-153, pp. 1097-1102, 2011

Online since:

October 2010

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Price:

$35.00

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