Journal
VACUUM
Volume 84, Issue 5, Pages 625-628Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2009.06.057
Keywords
Aluminum-doped zinc oxide (AZO) film; Sputtering; Transparent conducting oxide (TCO) film
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A hot-cathode plasma sputtering technique was used for fabricating the highly transparent and conducting aluminum-doped zinc oxide (AZO) films on glass substrates from a disk-shaped AZO (Al2O3: 2 wt.%) target. Under particular conditions where the target voltage was V-T = -200 V and the plasma excitation pressure was P-S = 1.5 x 10(-3) Torr, the lowest resistivity of 4.2 x 10(-4) Omega cm was obtained at 400 nm, and this was associated with a carrier density of 8.7 x 10(20) cm(-3) and a Hall mobility of 17 cm(2)/V s. From the annealing experiment of the AZO films in the oxygen and nitrogen gases of the atmospheric pressure it was revealed that both the oxygen vacancies and the grain boundaries in the polycrystalline AZO film played an important role in the electrical properties of the film. (C) 2009 Elsevier Ltd. All rights reserved.
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