Temperature-dependent material characterization of CuZnSe2 thin films
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Dosyalar
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In the present work, CuZnSe2 (CZSe) thin films were co-deposited by magnetron sputtering of ZnSe and Cu targets. The structural analyses resulted in the stoichiometric elemental composition and polycrystalline nature without secondary phase contribution in the film structure. Optical and electrical properties of CZSe thin films were investigated using temperature-dependent optical transmission and electrical conductivity measurements. The band gap energy values were obtained using transmittance spectra under the light of expression relating absorption coefficient to incident photon energy. Band gap energy values were found in decreasing behavior from 2.31 to 2.27 eV with increase in temperature from 10 to 300 K. Temperature-band gap dependency was evaluated by Varshni and O'Donnell models to detail the optical parameters of the thin films. The experimental dark and photoconductivity values were investigated by thermionic emission model over the grain boundary potential. Room temperature conductivity values were obtained in between 0.91 and 4.65 (× 10?4 ??1cm?1) under various illumination intensities. Three different linear conductivity regions were observed in the temperature dependent profile. These linear regions were analyzed to extract the activation energy values. © 2020 Elsevier B.V.
Açıklama
Anahtar Kelimeler
Optical properties, Photoconductivity, Temperature effect, Thin film, Activation energy, Energy gap, Grain boundaries, II-VI semiconductors, Light transmission, Optical properties, Photoconductivity, Selenium compounds, Thermal effects, Thermionic emission, Thin films, Zinc Selenide, Absorption co-efficient, Electrical conductivity measurements, Elemental compositions, Illumination intensity, Incident photon energy, Optical and electrical properties, Room-temperature conductivity, Temperature-dependent material, Optical films
Kaynak
Thin Solid Films
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
701