Optical and electrical properties cdo thin films prepared by chemical bath deposition technique

مقدم أطروحة جامعية

al-Ogili, Hadiyah Kazim J.

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم العلوم التطبيقية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2008

الملخص الإنجليزي

In this work CdO films were prepared by using chemical bath deposition technique, which is a simple, inexpensive and suitable technique for large deposition area.

The cadmium nitrate sail was used as a source of cadmium ions, many growth parameters have been considered in this work to specify the optimum conditions, namely (cadmium ion concentration, deposition time, temperature of solution and pH value).The structure, optical and electrical properties of CdO films are investigated and analyzed extensively with respect to growth conditions, Annealing in air act different temperatures (548, 573.

598, and 623k) at constant time of (15min_), X-Ray diffraction technique has confirmed the formation of cadmium oxide (CdO), and proved that the optimum deposition conditions which produce pure phase of CdO arc through molarity of nitrate 0.2M, 80C, pH = 9 and at deposition time of 30min.

The average grain size increases with annealing process due to relaxation in the tensile strain for deposition films. High quality films are achieved by adding KCN solution, leading to increasing in average grain size, transmission, and electrical conductivity from I6nm; 75%, and 88 ( cm)-1 to 36nm, 85%, and 365(acmy) respectively after KCN solution added. The values of thermal activation energies in low and high temperature regions could be altered with deposition conditions, where changed from 0.1 532eV and G,2825eV to 0.2910cV and 0,3650eV respectively after KCN added to the preparation solution, the CdO film has two values of activation energies as a result of polycrystalline structure, The CdO film which was deposited by bath contain to the KCN solution, the concentration and mobility of carriers reach to values of 4.5*1019 cm /3 and 50.69 cm2 / V.sec respectively.

التخصصات الرئيسية

الفيزياء

الموضوعات

• الخواص الكهربائية
• الخواص الضوئية

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305395