Farklı Oranlarda Sürfaktan İçeren PbS İnce Filmlerin Fiziksel Özelliklerinin İncelenmesi

Öz

Bu çalışmada, polikristal kurşun sülfür ince filmler, kokamid dietanolamin varlığında kimyasal banyo depolama tekniği kullanılarak cam altlıklar üzerinde başarılı bir şekilde biriktirilmiştir. Farklı oranlarda kullanılan kokamid dietanolaminin PbS ince filmlerin yapısal, morfolojik ve optik özellikleri üzerindeki etkileri X-ışını kırınımı (XRD), taramalı elektron mikroskobu (SEM), taramalı prob mikroskopisi (SPM) ve UV-görünür spektroskopi analizleri kullanılarak incelendi. XRD analizlerinden kokamid dietanolamin katkı miktarının artmasıyla PbS ince filmlerin kristal büyüklüklerinin 12.57 nm’ den 5.43 nm’ ye azaldığı elde edilmiştir. Ayrıca mikrogerilme ve dislokasyon yoğunluğu değerleri kokamid dietanolamin katkı miktarına bağlı olarak artmıştır. SEM analizi kokamid dietanolamin katkısının nanoyapılı PbS ince filmlerin yüzey morfolojilerini etkilediğini göstermektedir. SPM analizi kokamid dietanolamin katkısının artmasıyla ince filmlerin yüzey pürüzlülüğü değerlerinin arttığını göstermiştir. UV-görünür spektroskopi analizi ile %1 kokamid dietanolamin katkı miktarında PbS ince filmin optik geçirgenlik değerinin yaklaşık olarak 3 kat arttığı elde edilmiştir. Ayrıca, kokamid dietanolamin miktarına bağlı olarak PbS ince filmlerin optik bant aralığı değerleri 1.87 eV’ tan 2.53 eV’ a artmıştır.

Anahtar Kelimeler

• PbS
• İnce Film
• Sürfaktan
• Kimyasal Banyo Depolama

Investigation of Physical Properties of PbS Thin Films Containing Surfactant in Different Ratios

Öz

In the present study, polycrystalline lead sulfide thin films have been successfully deposited on glass substrates using chemical bath deposition technique in the presence of cocamide diethanolamine. The effects of cocamide diethanolamine used in different ratios on the structural, morphological, and optical properties of PbS thin films were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), scanning probe microscopy (SPM) and UV-visible spectroscopy analyses. From the XRD analysis, it was obtained that the crystal size of the PbS thin films decreased from 12.57 nm to 5.43 nm with the increase in the amount of cocamide diethanolamine additive. In addition, the microstrain and dislocation density values increased depending on the amount of cocamide diethanolamine additive. SEM analysis shows that cocamide diethanolamine additive affects the surface morphology of nanostructured PbS thin films. SPM analysis showed that the surface roughness values of the thin films increased with the increase of cocamide diethanolamine additive. By UV-visible spectroscopy analysis, it was obtained that the optical transmittance value of the PbS thin film increased approximately 3 times at the amount of 1% cocamide diethanolamine additive. In addition, the optical band gap values of PbS thin films increased from 1.87 eV to 2.53 eV depending on the amount of cocamide diethanolamine.

Anahtar Kelimeler

• PbS
• Thin Film
• Surfactant
• Chemical Bath Deposition

Kaynakça

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