Low Temperature Physics: 41, 129 (2015); https://doi.org/10.1063/1.4908204
Fizika Nizkikh Temperatur: Volume 41, Number 2 (February 2015), p. 169-184    ( to contents , go back )

Properties of solid solutions, doped films and nanocomposite structures based on ZnO

G.V. Lashkarev1, I.I. Shtepliuk1, A.I. Ievtushenko1, O.Y. Кhyzhun1, V.V. Кartuzov1, L.I. Ovsiannikova1, V.А. Кarpyna1, D.V. Myroniuk1

V.V. Кhomyak2, V.M. Tkach3, I.I. Timofeeva1, V.I. Popovich1, M.V. Dranchuk1, V.D. Кhranovskyy1, and P.V. Demydiuk1

1Frantsevich Institute for Problems of Materials Science of the National Academy of Sciences of Ukraine 3 Krzhizhanovsky Str., Kyiv 03680, Ukraine
E-mail: geolash@ipms.kiev.ua

2Черновицкий национальный университет им. Ю. Федьковича ул. Коцюбинского, 2, г. Черновцы, 58000, Украина

3Institute for Superhard Materials of the National Academy of Sciences of Ukraine 2 Avtozavodskaya Str., Kiev, 04074, Ukraine
pos Анотація:

Received November 13, 2014

Abstract

We have studied the properties of materials based on wide band-gap zinc oxide semiconductor that are promising for applications in optoelectronics, nano-plasmonics and photovoltaics. The structural and optical properties of Zn1–xCdxO solid solution films with different cadmium content grown by magnetron sputtering on sapphire substrates were investigated. The low-temperature photoluminescence spectra exhibited emission peaks associated with the radiative recombination processes in the film areas of different cadmium content. The x-ray phase analysis showed the pres-ence of a cubic phase of cadmium oxide in the films. Theoretical study of the thermodynamic properties of the solid solutions made it possible to interpret qualitatively the observed experimental phenomena. It was found that the growth of the films of homogeneous solid solutions was possible only at high temperatures, and the immiscibility gap was narrowed due to the elastic deformation energy caused by the lattice mismatch between the film and the substrate. Driving forces of spinodal decomposition in the Zn1–xCdxO system was revealed. Fullerene-like clusters ZnnxCdxOn were used for calculation the band gap and the cohesive energy of ZnCdO solid solutions. The properties of transparent conductive ZnO films doped with donor impurities of group III (Al, Ga, In) were considered. It is shown that the centers of hole traps in the photoconductivity processes in zinc oxide are responsible by the oxygen vacancies. Photoluminescence of nanocomposite metal–ZnO structures due to surface plasmons was reviewed.

PACS: 64.60.My Metastable phases;
PACS: 05.70.Ln Nonequilibrium and irreversible thermodynamics;
PACS: 61.72.Bb Theories and models of crystal defects;
PACS: 61.72.Mm Grain and twin boundaries.

Key words: zinc oxide, solid solutions, low-temperature luminescence, photoconductivity, isoelectronic impurity, radiation resistance.

Published online:: December 22, 2014

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