research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
The Optical Properties of Cadmium Sulfide Thin Film prepared by Electrochemical Deposition Technique

Author: Saeed J.Abbas
Journal: basrah journal of science البصرة للعلوم ISSN: 18140343 Year: 2007 Volume: 25 Issue: 2A english Pages: 1-11
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

Cadmium Sulfide (CdS) thin films were prepared by electrodeposition technique using a simple cell, on stainless steel and ITO glass as electrodes. The films were investigated by XRD . The XRD pattern indicated that CdS films possessing a polycrystalline hexagonal structure with lattice constants (a=4.223, c=6.684 A º). The optical energy gap of these films were calculated from the absorptance measurements (Eg =2.45 eV)

تم تحضير أغشية من مادة كبرتيد الكادميوم بطريقة الترسيب الكهروكيميائي باستخدام خلية بسيطة ، وعلى أقطاب من مادة الحديد المقاوم للصدأ و الزجاج المطلي بمادة ITO. شخصت هذه الأغشية باستخدام حيود الأشعة السينية. نتائج هذه الفحوصات تبين ان المادة المحضرة تمتلك تركيب النظام السداسي متعدد التبلور، وثوابت الشبيكة (a=4.223 , c=6.684 A º) . تم أيضا حساب فجوة الطاقة البصرية من قياسات الامتصاصية لهذه المادة وكانت Eg=2.45 eV) )

Keywords


Article
Effect of Annealing Temperature on Structural and Optical Properties of CdS Thin Films

Authors: Alaa S. Al-Kabbi --- Saeed J. Abbas --- Mohammad M. Ali
Journal: Journal of Basrah Researches (Sciences) مجلة ابحاث البصرة ( العلميات) ISSN: 18172695 Year: 2019 Volume: 45 Issue: 1A Pages: 1-13
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

The CdS thin films were deposited on glass substrates by two different methods, chemical bath deposition (CBD) and thermal evaporation (T.E.). The effect of annealing temperature on the structural and optical properties of the CdS thin films were investigated. The structural properties of CdS thin film was studied by X-ray diffraction. It was observed that the films have a polycrystalline hexagonal (wurtzite) structure with preferred orientation along (002) plane. The crystallite size calculated from XRD increases as the annealing temperature is increased. We observed that the lattice constant, micro strain, dislocation densities and number of crystallites per unit area of the films are quite different in these processes from XRD analysis by considering high intense diffraction peaks of the as-deposited and annealed films. The energy band gap in nanocrystalline CdS thin films has been estimated from absorption measurements. The band gap values for CBD-CdS thin films decreased from 2.75 to 2.45 eV and for T.E.-CdS thin films decreased from 2.60 to 2.43 eV with increasing annealing temperature. Small nanocrystals display wide band gaps as a result of the quantum confinement experienced by nanocrystals of a certain size

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2019 (1)

2007 (1)