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8 results on '"Golovanov, B. I."'

5. The investigation of the kinetics of the losses of nonequilibrium current carriers in Cu-=SUB=-2-delta-=/SUB=-NiSnS-=SUB=-4-=/SUB=- (0≤delta≤0.2) quaternary copper compounds

Author

null Novikov G. F., null Sedlovets D.M., null Golovanov B. I., null Rabenok E. V., and null Gapanovich M.V.

Abstract

By solid-phase synthesis from elemental Cu, Ni, Sn, and S samples Cu2-deltaNiSnS4 (0≤delta≤0.2) was prepared. The parameters of their crystal lattice have been refined. The lifetimes of photogenerated current carriers in Cu2-deltaNiSnS4 were estimated for the first time by the contactless time-resolved microwave photoconductivity method. This times turned out to be tau~7 ns, which is comparable with the literature data for the times in kesterites CZTS. Herewith, in kinetics of loses of photogenerated cureent carriers is observed predominance of bimolecular recombination processes over capture processes. Keywords: Cu2-deltaNiSnS4, onequilibrium current carriers, lifetimes, kinetics.

Published
2022
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7. Polycrystalline Cu2ZnSn(SxSe1– x)4 Solid Solutions: Synthesis, Phase Composition, and Photoconductivity Loss Kinetics.

Author

Gremenok, V. F., Hurtavy, V. G., Stanchik, A. V., Shoukavaya, T. V., Chumak, V. A., Rabenok, E. V., Rakitin, V. V., Golovanov, B. I., and Novikov, G. F.

Subjects
SELENIUM, PHOTOCONDUCTIVITY, X-ray microanalysis, ELECTROPHILES, ANALYTICAL mechanics, MICROWAVE measurements, SOLID solutions
Abstract

Polycrystalline Cu2ZnSn(SхSe1– х)4 solid solutions have been prepared by a single-temperature method using elemental Cu, Zn, Sn, S, and Se. The chemical composition of the synthesized materials has been determined by X-ray microanalysis and their crystal structure and phase composition have been studied by X-ray diffraction and Raman spectroscopy. Using frequency-time-resolved microwave photoconductivity measurements, we examined the effect of sulfur and selenium content on photogenerated current carrier loss kinetics in the Cu2ZnSn(SхSe1– х)4 solid solutions. An increase in sulfur content has been shown to result in the formation of additional deep levels, capable of acting as electron acceptors. [ABSTRACT FROM AUTHOR]

Published
2020
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