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Article
Effect of Incident Photon Energy on the Optical Conductivity and Carrier Concentration of the Thermally Evaporated ZnO:Al Thin Film

Author: Ali J. Mohammed
Journal: Al-Mustansiriyah Journal of Science مجلة علوم المستنصرية ISSN: 1814635X Year: 2010 Volume: 21 Issue: 5 Pages: 62-66
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

All doped ZnO thin film was prepared by thermal vacuum evaporation technique. The effect of incident photon energy on the optical (carrier concentration and conductivity ) of the prepared sample , depending on the transmission, absorption and extinction coefficient . Sharply increasing of carrier concentration and conductivity was recorded when the incident energy increased nearly the band gap region depending on the high absorption

في هذا البحث تم تحضير غشاء اوكسيد الخارصين المشوب بالالمنيوم بتقنية التبخير الحراري .تم دراسة تاثير طاقة الفوتون الساقط على بعض الخصائص البصرية ( اعتمادا على قياس النفاذية ) وبالذات على تركيز حاملات الشحن والتوصيلية الضوئية , وحساب معامل الامتصاص ومعامل الخمود . الدراسة بينت زيادة حادة في تركيز حاملات الشحن والتوصيلية الضوئية خصوصا لطاقة الفوتون ضمن المنطقة القريبة من حافة الامتصاص وبحدود طاقة الفجوة , وبسبب حصول اعلى امتصاص في هذه المنطقة وكذلك فان ادنى مقدار للنفاذية هو في المنطقة ادنى من حافة الامتصاص


Article
Optical and Electrical Properties of ZnO Thin Films Prepared by Spray Pyrolysis Technique

Authors: A.J. Mohammad --- A.M. Mousa --- K.H. Hussain
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2008 Volume: 4 Issue: 1 Pages: 37-40
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

In this work, ZnO thin films were prepared using spray paralysis technique at different molarities of aqueous zinc chloride solution. This study focused on the effect of morality on the optical and electrical properties, therefore, many samples were produced to explore and determine the optimum characteristics of the prepared samples. These properties include the optical properties such as transmittance, bandgap energy, skin depth, carrier concentration, photoconductivity, absorption edge shift, optical constants such as absorption coefficient and extinction coefficient, and electrical properties such as I-V characteristics, electrical conductivity and resistivity under dark or illumination conditions.

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