GÜNEŞ PİLİ UYGULAMALARI İÇİN CdS İNCE FİLMLERİN OPTİK ÖZELLİKLERİNİN MALTOZ KATKISIYLA GELİŞTİRİLMESİ

Abstract

Kimyasal banyo depolama (CBD) yöntemi kullanılarak nano yapılı kadmiyum sülfit (CdS) ince filmler cam yüzeyler üzerinde üretilmiştir. Farklı konsantrasyonlardaki maltoz (C₁₂H₂₂O₁₁,α-D-Glukopiranozil-(1→4)-α-D-Glukopiranoz), büyüme çözeltilerinde bir katkı maddesi olarak kullanılmıştır. Maltozun CdS ince filmlerin yapısal, morfolojik ve optik özellikleri üzerindeki etkisi X-Işını kırınımı (XRD), taramalı elektron mikroskobu (SEM) ve UV-Vis spektrofotometre kullanılarak incelenmiştir. Analizler, filmlerin kristal büyüklüklerinin maltoz konsantrasyonunun artmasıyla azaldığını ve filmlerin homojenliğinin maltoz konsantrasyonunun aratmasıyla arttığını göstermiştir. Ayrıca, hem optik yasak enerji bant aralığı hem de optik geçirgenlik değerleri maltoz konsantrasyonunun artmasıyla artmıştır. Bu sonuçlar büyüme çözeltisi içindeki maltoz konsantrasyonunun artmasının nano yapılı CdS filmlerin yüzey morfolojilerini, kristal yapılarını, yasak enerji bant aralığını ve optik geçirgenlik değerlerini dikkat çekici bir şekilde etkilediğini göstermiştir.

Keywords

• CdS,maltoz,optik özellikler,kimyasal banyo depolama

Improvement of Optical Properties of CdS Thin Films by Maltose Additive for Solar Cell Applications

Abstract

Nanostructured cadmium sulfide (CdS) thin films were fabricated on glass substrates by using chemical bath deposition (CBD) method. Different concentrations of maltose (C₁₂H₂₂O₁₁,α-D-Glukopiranozil-(1→4)-α-D-Glukopiranoz) were used as an additive in the growth solutions. The influence of maltose on structural, morphological and optical properties of CdS films has been investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible (UV-Vis.) analysis. The analysis showed that the values of crystallite size of the films decreases with increasing maltose concentration in the bath and the uniformity of the films increases with increasing maltose concentrations. Also, both the optical band gap value and transmission rate increases with increasing maltose concentration. These results show that increasing maltose concentration in the growth solution remarkably affects the surface morphology, crystal structure, band gap and transmittance of the nanostructured CdS films.

Keywords

• CdS,maltose,optical properties,chemical bath deposition

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