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International Journal of PhotoenergyVolume 2013 2013, Article ID 738063, 6 pages

Research ArticleDepartment of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Nagoya 466-8555, Japan

Received 12 December 2012; Revised 22 January 2013; Accepted 22 January 2013

Academic Editor: Fahrettin Yakuphanoglu

Copyright © 2013 Ying Song and Masaya Ichimura. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Cu2O is considered to be promising as an absorber layer material of solar cells, but its band gap about 2.1 eV is larger than the optimum one about 1.5 eV. CuO has a smaller band gap of about 1.35 eV. Therefore, we attempted to oxidize Cu2O using H2O2 to increase oxygen ratio and decrease band gap. Cu2O thin films were deposited on indium-tin-oxide-coated glass from an aqueous solution containing CuSO4, lactic acid, and KOH by the galvanostatic electrochemical deposition at 40°C with current density of −1 mA-cm

. Then, the as-prepared copper oxide thin film was dipped in H2O2 30% at fixed temperature to oxidize for some time. By the H2O2 treatment at room temperature, the oxygen content was increased, and the band gap was decreased.

Author: Ying Song and Masaya Ichimura

Source: https://www.hindawi.com/


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