Lohaus, C. ; Morasch, J. ; Brötz, J. ; Klein, Andreas ; Jaegermann, W. (2016)
Investigations on RF-magnetron sputtered Co3O4 thin films regarding the solar energy conversion properties.
In: Journal of Physics D: Applied Physics, 49 (15)
doi: 10.1088/0022-3727/49/15/155306
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Co3O4 samples have been deposited using RF-magnetron sputtering from an oxide target. In-situ X-Ray and Ultraviolet Photoelectron Spectroscopy and X-Ray Diffraction have been carried out to identify the phase and composition of the films. The work function of Co3O4 films showed variation of about 1 eV depending on the oxygen content of the sputter gas while the Fermi level position in the band gap was invariant towards different deposition parameters. Optical transmission spectroscopy in the UV/VIS/NIR regime showed two optical transitions at 0.8 eV and 1.7 eV. However, the optical absorption from these transition does not seem to aid in the conduction of charge carriers as has been revealed by conductivity measurements in a linear 4-point-setup. Diodes were prepared in a glass|FTO|TiO2|Co3O4|NiO|Au-stacking geometry. They show poor photovoltaic behaviour with a short-circuit current of 0.33mAcm−1 and an open-circuit voltage of 0.15V, resulting in an overall efficiency of n = 0.01%. The limitation of Co3O4 as an absorber in an All-Oxide solar cell can be related to poor transport properties combined with defect states in the band gap and Fermi level pinning at interfaces.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Lohaus, C. ; Morasch, J. ; Brötz, J. ; Klein, Andreas ; Jaegermann, W. |
| Art des Eintrags: | Bibliographie |
| Titel: | Investigations on RF-magnetron sputtered Co3O4 thin films regarding the solar energy conversion properties |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics D: Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 49 |
| (Heft-)Nummer: | 15 |
| DOI: | 10.1088/0022-3727/49/15/155306 |
| Kurzbeschreibung (Abstract): | Co3O4 samples have been deposited using RF-magnetron sputtering from an oxide target. In-situ X-Ray and Ultraviolet Photoelectron Spectroscopy and X-Ray Diffraction have been carried out to identify the phase and composition of the films. The work function of Co3O4 films showed variation of about 1 eV depending on the oxygen content of the sputter gas while the Fermi level position in the band gap was invariant towards different deposition parameters. Optical transmission spectroscopy in the UV/VIS/NIR regime showed two optical transitions at 0.8 eV and 1.7 eV. However, the optical absorption from these transition does not seem to aid in the conduction of charge carriers as has been revealed by conductivity measurements in a linear 4-point-setup. Diodes were prepared in a glass|FTO|TiO2|Co3O4|NiO|Au-stacking geometry. They show poor photovoltaic behaviour with a short-circuit current of 0.33mAcm−1 and an open-circuit voltage of 0.15V, resulting in an overall efficiency of n = 0.01%. The limitation of Co3O4 as an absorber in an All-Oxide solar cell can be related to poor transport properties combined with defect states in the band gap and Fermi level pinning at interfaces. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung |
| Hinterlegungsdatum: | 22 Mär 2016 21:05 |
| Letzte Änderung: | 09 Mär 2017 12:17 |
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