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Ohmic electrodes for dark electronic conductivity measurements in Ag2S thin films

D. KARASHANOVA1,* , J. PIROV1, N. STARBOV1

Affiliation

  1. Central Laboratory of Photoprocesses “Acad.J.Malinowski”, Bulgarian Academy of Sciences, Acad. G. Bonchev St., block 109, 1113 Sofia, Bulgaria

Abstract

Silver sulfide is an ionic compound with semiconductor properties. As a result, it exhibits a mixed conductivity – electronic and ionic, their separate measurement being a serious experimental problem. In the case of ionic conductivity, this problem is successfully solved by applying double electron blocking AgI/Ag contacts. In the present paper, ion blocking contacts are applied for DC measurement of the dark electronic conductivity of Ag2S. It is demonstrated that the double AgBr/Au electrodes are ohmic and suitable for reliable evaluation of the electronic current parameters, in the volume as well as in the subsurface region of Ag2S thin films..

Keywords

Silver sulfide, DC electronic conductivity, Ohmic electrodes, Thin films.

Submitted at: Nov. 28, 2006
Accepted at: Jan. 15, 2007

Citation

D. KARASHANOVA, J. PIROV, N. STARBOV, Ohmic electrodes for dark electronic conductivity measurements in Ag2S thin films, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 1, pp. 225-228 (2007)