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Solar cells based on copper oxide and titanium dioxide prepared by reactive direct-current magnetron sputtering

Wisz Grzegorz, Sawicka-Chudy Paulina, Sibiński Maciej, Starowicz Zbigniew, Płoch Dariusz, Góral A., Bester Mariusz, Cholewa M., Woźny Janusz, Sosna-Głębska A.

Opto-Electronics Review

2021

Vol. 29, No. 3

97--104

In this study, solar cells based on copper oxide and titanium dioxide were successfully manufactured using the reactive direct-current magnetron sputtering (DC-MS) technique with similar process parameters. TiO₂/CuO, TiO₂/Cu₂O/CuO/Cu₂O, and TiO₂/Cu₂O solar cells were manufactured via this process. Values of short-circuit current efficiencies, short-circuit current density, open-circuit voltage, and maximum power of PV devices were investigated in the range of 0.02÷0.9%, 75÷350 µA, 75÷350 µA/cm², 16÷550 mV, and 0.6÷27 µW, respectively. The authors compare solar cells reaching the best and the worst conversion efficiency results. Thus, only the two selected solar cells were fully characterized using I-V characteristics, scanning electron microscopy, X-ray diffraction, ellipsometry, Hall effect measurements, and quantum efficiency. The best conversion efficiency of a solar cell presented in this work is about three times higher in comparison with the authors’ previous PV devices.