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Papers by Author: M. Kauk

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Authors: E. Mellikov, D. Meissner, M. Altosaar, M. Kauk, J. Krustok, A. Öpik, O. Volobujeva, J. Iljina, K. Timmo, I. Klavina, J. Raudoja, M. Grossberg, T. Varema, K. Muska, M. Ganchev, S. Bereznev, M. Danilson

Abstract: This paper reviews results of studies on different materials and technologies for polycrystalline solar cells conducted at Tallinn University of Technology. Structural properties and defect structure of kesterite CZTS compounds (Cu2ZnSnSe4, Cu2ZnSn(SSe)4) were studied. Influence of selenization parameters of a Zn-Cu-Sn stacked layer on the CZTS layer growth and on the morphology, distribution of elements was analyzed. All the results obtained have been used to optimize the technology of producing solar cell structures in different designs. Cu2ZnSnSe4 and, Cu2ZnSn(SSe)4 based monograin layer solar cells were developed.

Point Defects Interaction with Extended Defects and Impurities and Its Influence on the Si-SiO₂ System Properties

Authors: Daniel Kropman, U. Abru, Tiit Kärner, U. Ugaste, E. Mellikov, M. Kauk, Ivo Heinmaa, A. Samoson, Arthur Medvid

Abstract: The type and density of the point defects that are generated in the Si surface layer during thermal oxidation depend on the oxidation condition: temperature, cooling rate, oxidation time, impurity content. The interaction between point defects with extended defects and impurities affect the Si-SiO2 interface properties. The influence of point defects may be diminished and the interface properties improved by an appropriate choice of oxidation conditions.

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