Structural, morphological and temperature-tuned bandgap characteristics of CuS nano-flake thin films
Yükleniyor...
Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Copper sulfide (CuS) thin films were produced by radio-frequency (RF) magnetron sputtering method. Structural, morphological and optical characteristics of deposited CuS films were presented. X-ray diffraction pattern showed two intensive peaks associated with hexagonal crystalline structure. Scanning electron microscopy image indicated that CuS films have nano-flake structured. Raman spectrum was reported to show vibrational characteristics of the CuS nano-flake thin films. Two peaks associated with Cu–S and S–S vibrations were observed in the Raman spectrum. Transmission spectra were recorded at various temperatures between 10 and 300 K. The analyses accomplished considering Tauc expression demonstrated that direct bandgap energy decreases from 2.36 eV (at 10 K) to 2.22 eV (at 300 K). Temperature-bandgap dependency was analyzed considering Varshni and Bose-Einstein expressions to reveal bandgap at 0 K, rate of change of bandgap and Debye temperature. CuS nanoflake thin film may be used in optoelectronic and photocatalysis applications thanks to its direct and narrow bandgap energy characteristics. © 2022 Elsevier B.V.
Açıklama
Anahtar Kelimeler
Copper sulfide, Nanoflake, Optical properties, Optoelectronic applications, Copper compounds, Energy gap, Magnetron sputtering, Optical films, Raman scattering, Scanning electron microscopy, Statistical mechanics, Sulfur compounds, Thin films, Band gap energy, Morphological characteristic, Nano-flakes, Optical characteristics, Optoelectronic applications, Radio frequency magnetron sputtering method, Structural characteristics, Temperature tuned, Thin-films, X ray diffraction patterns, Optical properties
Kaynak
Physica E: Low-Dimensional Systems and Nanostructures
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
144