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Effect of Aluminum Nitrate Concentration in Zinc Acetate Precursor on ZnO:Al Thin Films Prepared by Spray Pyrolysis

Published online by Cambridge University Press:  31 January 2011

Samerkhae Jongthammanurak
Affiliation:
samerkhj@mtec.or.th, 1National Metal and Materials Technology Center, Pathumthani, Thailand
Sirirak Phakkeeree
Affiliation:
sirak_ploy@hotmail.com, Kasetsart University, Bangkok, Thailand
Yot Boontongkong
Affiliation:
yotb@mtec.or.th, 1National Metal and Materials Technology Center, Pathumthani, Thailand
Chanchana Thanachayanont
Affiliation:
chanchm@mtec.or.th, 1National Metal and Materials Technology Center, Pathumthani, Thailand
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Abstract

Aluminium-doped zinc oxide (ZnO) films have been prepared by spray pyrolysis technique using the mixed solution of zinc acetate dihydrate and aluminium nitrate nonahydrate in methanol. Concentration of aluminum in the solution was varied in a range of 1, 3 and 5 atomic percents. The results from X-ray diffraction showed that the preferred orientation of ZnO films changed to the [002] direction when the concentration of aluminum in the solution exceeded 1 atomic percents. ZnO films deposited from the 3 atomic percent Al containing solution had the largest grains and showed the lowest resistivity of 75 Ω-cm. Addition of aluminum into the precursor solution shifted the absorption edge towards longer wavelengths.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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