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Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method

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Main Authors: Muhammad, Kashif, Uda, Hashim, Prof. Dr., Md. Eaqub, Ali, Ala'eddin Ahmad Jaber, Saif, Dr., Syed Muhammad Usman, Ali, Willander, Magnus, Prof
Other Authors: kashif_bme@yahoo.com
Format: Article
Language:English
Published: Emerald Group Publishing Limited 2013
Subjects:
Microelectronics
Electrical impedance
Temperature
Sol-gel
Nanorods
Impedance
ZnO
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/22921
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spelling my.unimap-229212013-01-10T10:17:21Z Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method Muhammad, Kashif Uda, Hashim, Prof. Dr. Md. Eaqub, Ali Ala'eddin Ahmad Jaber, Saif, Dr. Syed Muhammad Usman, Ali Willander, Magnus, Prof kashif_bme@yahoo.com uda@unimap.edu.my eaqubali@gmail.com alaeddin@unimap.edu.my syeal@itn.liu.se magwi@itn.liu.se Microelectronics Electrical impedance Temperature Sol-gel Nanorods Impedance ZnO Link to publisher's homepage at http://www.emeraldinsight.com/ Purpose – The purpose of this paper is to investigate the electrical transport mechanism of the Al-doped ZnO nanorods at different temperatures by employing impedance spectroscopy. Design/methodology/approach – Al-doped ZnO nanorods were grown on silicon substrate using step sol-gel method. For the seed solution preparation Zinc acetate dihydrate, 2-methoxyethanol, monoethanolamine and aluminum nitrite nano-hydrate were used as a solute, solvent, stabilizer and dopant, respectively. Prior to the deposition, P-type Si (100) wafer was cut into pieces of 1 cm £ 2 cm. The samples were then cleaned in an ultrasonic bath with acetone, ethanol, and de-ionized (DI) water for 5 min. The prepared seed solution was coated on silicon substrate using spin coater at spinning speed of 3000 rpm for 30 s and then dried at 2508C for 10 min followed by annealing at 5508C for 1 h. The hydrothermal growth was carried out in a solution of zinc nitrate hexahydrate (0.025M), Hexamethyltetramine (0.025M) in DI water. Findings – Al-doped ZnO nanorods were characterized using scanning electron microscope (SEM), X-ray diffraction (XRD) and impedance spectroscopy. The impedance measurements were carried out at various temperatures (1008C-3258C). The impedance results showed that temperature has great influence on the impedance; the impedance value decreased as the temperature increased. This decrement is attributed to the increase of the mobility of the defects, especially the oxygen vacancies. The surface morphology of the samples was measured by SEM and X-ray diffraction. The SEM images show that the high density of Al-doped ZnO nanorods covers the silicon substrate, whereas the XRD pattern shows the (002) crystal orientation. Originality/value – This paper demonstrates the electron transport mechanism of Al-doped ZnO nanorods, at different temperatures, to understand the charge transport model. 2013-01-10T08:16:02Z 2013-01-10T08:16:02Z 2012 Article Microelectronics International, vol.29 (3), 2012, pages 131–135 1356-5362 http://www.emeraldinsight.com/journals.htm?articleid=17045599&show=abstract http://hdl.handle.net/123456789/22921 en Emerald Group Publishing Limited
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Microelectronics
Electrical impedance
Temperature
Sol-gel
Nanorods
Impedance
ZnO
spellingShingle Microelectronics
Electrical impedance
Temperature
Sol-gel
Nanorods
Impedance
ZnO
Muhammad, Kashif
Uda, Hashim, Prof. Dr.
Md. Eaqub, Ali
Ala'eddin Ahmad Jaber, Saif, Dr.
Syed Muhammad Usman, Ali
Willander, Magnus, Prof
Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method
description Link to publisher's homepage at http://www.emeraldinsight.com/
author2 kashif_bme@yahoo.com
author_facet kashif_bme@yahoo.com
Muhammad, Kashif
Uda, Hashim, Prof. Dr.
Md. Eaqub, Ali
Ala'eddin Ahmad Jaber, Saif, Dr.
Syed Muhammad Usman, Ali
Willander, Magnus, Prof
format Article
author Muhammad, Kashif
Uda, Hashim, Prof. Dr.
Md. Eaqub, Ali
Ala'eddin Ahmad Jaber, Saif, Dr.
Syed Muhammad Usman, Ali
Willander, Magnus, Prof
author_sort Muhammad, Kashif
title Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method
title_short Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method
title_full Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method
title_fullStr Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method
title_full_unstemmed Structural and impedance spectroscopy study of Al-doped ZnO nanorods grown by sol-gel method
title_sort structural and impedance spectroscopy study of al-doped zno nanorods grown by sol-gel method
publisher Emerald Group Publishing Limited
publishDate 2013
url http://dspace.unimap.edu.my/xmlui/handle/123456789/22921
_version_ 1643793841820532736
score 13.222552

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