ZnO Films Obtained by Reactive Magnetron Sputtering: Microstructure, Electrical, and Optical Characteristics

Autor: T. V. Petlitskaya, S. Kh. Suleymanov, A. N. Petlitskii, V. G. Dyskin, V.F. Gremenok, M. U. Djanklich, N. A. Kulagina, V. A. Ivanov
Rok vydání: 2020
Předmět:
Zdroj: Applied Solar Energy. 56:186-191
ISSN: 1934-9424
0003-701X
Popis: In this study, a technology producing undoped crystalline zinc oxide films with purposefully changed electrical resistance ρ = 3 × 10–4–1 × 107 Ω cm has been developed. The relationship between the electrical characteristics of ZnO layers and the parameters of their deposition has been studied, and the conditions for the formation of high-resistance i-ZnO and low-resistance n-ZnO films with specified values of electrical resistance have been determined. It has been established that the dominant factor determining the conductivity of ZnO films is a change in the concentration of free carriers, controlled by oxygen vacancies. To select the optimal conditions for the formation of highly transparent coatings with a given conductivity, the microstructure and spectral properties (edge absorption and transmission spectra in the transparency region) of n-ZnO films deposited by reactive magnetron sputtering of a zinc target in an argon atmosphere with oxygen (10% Ar, 90% O2) at a pressure of 5 × 10–3 Torr have been studied. It has been shown that the developed method for the discrete formation of ZnO films on amorphous substrates provides stoichiometric crystal structures with a high packing density and spatial orientation of crystallites in the [002] direction. Even in the case of n-ZnO films with ρ = 3 × 10–3 Ω cm, the microstructure causes a high transmittance of the coatings.
Databáze: OpenAIRE
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