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Annealing-induced effects on structural and optical properties of Cd1-xZnxS thin films for optoelectronic applications

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Cd1-xZnxS thin films of variable compositions (x = 0.2, 0.4, 0.6, 0.8) were deposited on glass at room temperature by thermal evaporation process. The prepared samples were annealed at two different temperatures (300 degrees C, 400 degrees C) for 1 hour in ambient air. The effects of post-annealing on the structural and optical characteristics were investigated using X-ray diffraction (XRD), spectrophotometry, and Raman spectroscopy (RS) methods. XRD studies suggested that the annealed and as-deposited samples belong to wurtzite structure for all Zn concentrations with a preferential orientation along (002) plane. Spectrophotometry analysis of the samples revealed that the energy band gap decreased with annealing temperature. RS investigated different phonon bands and crystalline phases. Two longitudinal optical phonon modes (1-LO, 2-LO) corresponding to monophase hexagonal structure were observed for all Cd1-xZnxS samples. The observed red-shift and anti-symmetrical nature of the 1-LO phonon mode can be associated with annealing, while the overall blue-shift, except for x ≤ 0.6, was caused by the structural disorders in periodic Cd atomic sub-lattices and broken translational symmetry. The spectroscopic results were strengthened by the XRD studies and their results are consistent.
Słowa kluczowe
Wydawca
Rocznik
Strony
677--684
Opis fizyczny
Bibliogr. 32 poz., rys., tab.
Twórcy
autor
  • Nano-devices Lab, National Institute of Lasers and Optronics (NILOP), P.O. Nilore-45650, Islamabad, Pakistan
autor
  • Nano-devices Lab, National Institute of Lasers and Optronics (NILOP), P.O. Nilore-45650, Islamabad, Pakistan
autor
  • Department of Applied Physics, Federal Urdu University of Arts, Sciences and Technology, Islamabad, Pakistan
autor
  • Nano-devices Lab, National Institute of Lasers and Optronics (NILOP), P.O. Nilore-45650, Islamabad, Pakistan
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-9982e5c0-6abb-4b06-b323-42618cc31313
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