Influence of the annealing treatment on structural, optical and morphological properties of CdS films obtained by chemical bath deposition

Year 2017, Volume: 21 Issue: 6, 1229 - 1236, 01.12.2017

Ahmet Senol Aybek , Hilal Rüzgar

https://doi.org/10.16984/saufenbilder.284445

Abstract

Cadmium sulphide films have been deposited onto glass
substrate by chemical bath deposition method. The CdS films have been annealed
in the temperature range of 200-400 ^oC at one hour in nitrogen gas.
The crystal structures of the films were determined by x-ray diffraction (XRD)
patterns. XRD data showed that the transition from CdS (FCC) to α-CdS (Hawleyite) form by annealing effect.
The optical band gaps of the films have been obtained from the optical
absorbance spectrum found to be 2.33 and 2.39 eV. The bands bending in the
films were calculated to be between 120-350 meV. The optical transmissions of
the films have been determined to be between 45-92 % in the visible region.

Keywords

CdS, Chemical bath deposition, Thermal annealing, Optical properties

Kimyasal banyo depolama yöntemi ile elde edilen cds filmlerinin yapısal, optiksel ve morfolojik özellikleri üzerine tavlama işleminin etkisi

Abstract

Kadmiyum sülfür filmleri kimyasal banyo depolama yöntemi ile
cam tabanlar üzerine biriktirildi. Elde edilen filmler azot gazında 1 saat
boyunca 200-400 ^oC sıcaklık aralığında tavlandı. Filmlerin kristal
yapısı x-ışını kırınım (XRD) desenlerinden belirlendi. XRD verileri, tavlama
etkisiyle CdS (FCC) yapısından α-CdS
(Hawleyite) formuna geçiş olduğunu gösterdi. Elde edilen CdS filmlerinin
optiksel bant aralığı değerleri optiksel absorbans spetrumlarından
yararlanılarak 2,33 ve 2,39 eV olarak belirlendi. Bant sarkmaları değerleri
120-350 meV arasında olduğu hesaplandı. Filmlerin görünür bölgede %45-92
arasında geçirgenlik değerlerine sahip olduğu belirlendi.

Keywords

CdS, Kimyasal banyo depolama, Tavlama, Optik özellikler

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