Structural, morphological and temperature-tuned bandgap characteristics of CuS nano-flake thin films

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Küçük Resim

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

Sayı

Künye