Journal
THIN SOLID FILMS
Volume 445, Issue 2, Pages 299-303Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0040-6090(03)01175-1
Keywords
oxides; sputtering; p-type; CuAlO2
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p-Type Cu-Al-O films are successfully prepared by using radio frequency magnetron reactive co-sputtering deposition with Cu and Al metallic targets. Stoichiometric Cu/Al atomic percentage ratio has been achieved. The films show good transmittance in the range of 20-80% with an average thickness of 250 nm. The optical direct band gaps of the films are found in the range of 2.9-3.3 eV depending on the aluminum content. Blue-shift in absorption edge and optical band gap broadening effect are found with the increase of Al content in the films. (C) 2003 Elsevier B.V. All rights reserved.
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