Photovoltaic properties of thin film heterojunctions with cupric oxide absorber

Journal article
(Online publication)

Publication Details

Author(s): Dimopoulos T, Peic A, Muellner P, Neuschitzer M, Resel R, Abermann S, Postl M, List EJW, Yakunin S, Heiß W, Brueckl H
Journal: Journal of Renewable and Sustainable Energy
Publisher: American Institute of Physics (AIP)
Publication year: 2013
Volume: 5
Journal issue: 1
ISSN: 1941-7012


In this work, we report on the fabrication, characterization, and photovoltaic properties of sputter-deposited, thin film heterojunctions combining p-type cupric oxide (CuO) absorber with n-type ZnO. The structural investigation reveals highly crystalline, columnar growth of the layers and confirms that the absorber's phase is purely CuO, with only negligible traces of Cu2O. The optical characterization yields for CuO an indirect bandgap of 1.2 eV and a direct optical transition at approximately 3 eV. The short circuit current, open circuit voltage, fill factor, and power conversion efficiency of the heterojunction solar cells were extracted as a function of the CuO thickness under AM1.5G (1 kW/m(2)) illumination. From the observed dependencies, we conclude that the photovoltaic performance is compromised by a restricted carrier collection efficiency, caused by the small carrier lifetime in CuO. Indeed, the carrier population is found to decay with time constants of 40 and 460 ps. A maximum power conversion efficiency of 0.08% was obtained for the solar cell with CuO thickness of 500 nm. (C) 2013 American Institute of Physics. []

FAU Authors / FAU Editors

Heiß, Wolfgang Prof. Dr.
Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)

External institutions with authors

AIT Austrian Institute of Technology
Johannes Kepler Universität (JKU) Linz
NanoTecCenter Weiz Forschungsgesellschaft mbH
Technische Universität Graz

How to cite

Dimopoulos, T., Peic, A., Muellner, P., Neuschitzer, M., Resel, R., Abermann, S.,... Brueckl, H. (2013). Photovoltaic properties of thin film heterojunctions with cupric oxide absorber. Journal of Renewable and Sustainable Energy, 5(1).

Dimopoulos, T., et al. "Photovoltaic properties of thin film heterojunctions with cupric oxide absorber." Journal of Renewable and Sustainable Energy 5.1 (2013).


Last updated on 2018-08-08 at 05:23