Journal article
Preferential zinc sputtering during the growth of aluminum doped zinc oxide thin films by radio frequency magnetron sputtering
Department of Energy Conversion and Storage, Technical University of Denmark1
Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark2
Plasma Aided Nanotechnology, Nanofabrication, National Centre for Nano Fabrication and Characterization, Technical University of Denmark3
Nanofabrication, National Centre for Nano Fabrication and Characterization, Technical University of Denmark4
National Centre for Nano Fabrication and Characterization, Technical University of Denmark5
Aluminum doped ZnO is one of the main candidates to replace indium tin oxide used as a transparent conducting oxide. Despite the intensive research, the mechanism behind the poor thin-film-resistivity uniformity over the sample deposited by magnetron sputtering is not completely understood. Several independent reports correlate the mirroring of an erosion track on the substrate with energetic negative oxygen ions.
However, their role on assisting the thin film growth is not known. In this work, the physical and chemical properties of aluminum doped ZnO are measured with a high spatial resolution at different thin film deposition pressures. The results show that Zn depletion by energetic negative oxygen ion re-sputtering is the main factor correlating with the resistivity and the band gap energy profiles of the deposited films.
Language: | English |
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Year: | 2022 |
Pages: | 14444-14452 |
ISSN: | 20507534 and 20507526 |
Types: | Journal article |
DOI: | 10.1039/d2tc02180c |
ORCIDs: | Norrman, Kion , Norby, Poul and Stamate, Eugen |