Persons

Николай Алексеевич  Дюжев
Cand. Sci. (Phys.-Math.), Head of Shared Facilities Center «MST&ECB», National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

Article author

The results of the work on creation of the design and geometry optimization of the magnetic field sensors based on anisotropic magnetoresistive thin-film structures have been presented. The magnetic field sensors with an odd linear response with the sensitivity up to 23.7 (mV/V)(kA/m) and 180 degree rotation sensor with the signal amplitude 15 mV/C have been obtained. The possibility of the developed sensors functionality in hard environments in the temperature range from minus 60 up to +150 °C based on the thermal tests results has been demonstrated. The temperature coefficient of sensitivity was minus 0.35% °C. The sensors have been tested in the angle, speed and phase sensors in the automotive industry. The characteristics of the developed sensors have shown that they match the characteristics of the sensors produced by the leading world firms.

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Recently the films of solid solutions CuZnSn(S Se) (CZTSSe) are used as the light absorbing layers in the thin film solar elements. The CZTSSe films are the Cu(In, Ga)Se analog, but do not contain rare and expensive In and Ga elements. In this study the CZTSSe absorbing films have been grown by a two-step process. At the first step the electrochemical deposition of the Cu, Zn, Sn and S components on the Mo coated glass has been performed. At the second step the annealing in the Se(S) atmosphere under the N flow has followed. It has been shown that the phase composition and structure of the synthesized CZTSSe thin films are strongly dependent on their elemental composition and processing regimes. The CZTSSe polycrystalline thin films of tetragonal structure, containing kesterite and stannite phases with the band gap energies 1.36 and 1.48 eV , have been obtained. The investigation of CZTSSe films by Raman spectroscopy confirms the formation of CZTSSe solid solutions with a two-mode character of vibrations for films, containing more than 30 at% sulfur. The preliminary results demonstrate the applicability of the proposed approach for producing the CZTSSe absorber for thin film solar cells.

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