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

Kadmiyum sülfür filmleri kimyasal banyo depolama yöntemi ile cam tabanlar üzerine biriktirildi. Elde edilen filmler azot gazında 1 saat boyunca 200-400 o C sıcaklık aralığında tavlandı. Filmlerin kristal yapısı x-ışını kırınım (XRD) desenlerinden belirlendi. XRD verileri, tavlama etkisiyle CdS (FCC) yapısından αCdS (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.

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

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 o C 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.

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