Document Details
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Document Type |
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Article In Journal |
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Document Title |
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Electrical properties of thin films of a-GaxTe100-x composed of nanoparticles Electrical properties of thin films of a-GaxTe100-x composed of nanoparticles |
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Subject |
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Physics |
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Document Language |
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English |
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Abstract |
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Thin films of GaxTe100-x (x = 3, 6, 9 and 12) have been synthesized by thermal evaporation. From SEM images, it is observed that all the films contain nanoparticles of sizes varying from 100 to 200 nm. The dc electrical conductivity of the as-deposited films of GaxTe 100-x nanoparticles is measured as a function of temperature range from 298 to 383 K, and increases exponentially with temperature. The value of the activation energy, calculated from the slope of ln σdc versus 1000/T plots, is found to decrease with increase in the Ga content. On the basis of the value of the pre-exponential factor σo, it is suggested that the conduction is due to thermally assisted tunneling of carriers in localized states near the band edges. The optical measurements suggest an indirect optical band gap in this system. The value of the optical band gap decreases on increasing the Ga concentration. |
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ISSN |
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0950-0839 |
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Journal Name |
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Philosophical Magazine Letters |
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Volume |
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91 |
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Issue Number |
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3 |
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Publishing Year |
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1432 AH
2011 AD |
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Article Type |
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Article |
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Added Date |
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Monday, February 6, 2012 |
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Researchers
| ذيشان حسين خان | Khan, Zishan H | Researcher | Doctorate | zishan_hk@yahoo.co.in |
| شمشاد أحمد خان | Khan, Shamshad Ahmed | Researcher | Doctorate | shamshad_phys@yahoo.com |
| نعمان صلاح | Salah, Numan | Researcher | Doctorate | nsalah@kau.edu.sa |
| أحمد عبدالله الغامدي | Al-Ghamdi, Ahmad A | Researcher | Doctorate | AGAMDI@kau.edu.sa |
| سامي سعيد حبيب | Habib, Sami Saeed | Researcher | Doctorate | shabib@kau.edu.sa |
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