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Fabrication of Cu2O/Fe–O heterojunction solar cells by electrodeposition

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Publication date: 31 December 2015
Source:Thin Solid Films, Volume 597
Author(s): J.J.M. Vequizo, C. Zhang, M. Ichimura
Cu2O/Fe–O heterojunction solar cells were successfully fabricated by electrodeposition method. The as-deposited thin film exhibited signature Raman peaks associated to γ-FeOOH. By thermal annealing in air at 100–400°C, different Fe2O3 polymorphs were produced. Both as-deposited and annealed Fe–O films showed n-type conductivity with approximated band gap of 2.1–2.3eV. Resistivity was ~680Ωcm for γ-FeOOH and >700Ωcm for Fe2O3 films. Cu2O as the p-type layer was partnered with as-deposited and annealed Fe–O thin films to fabricate different heterojunctions based on Fe oxides compounds. Remarkably, all the fabricated Cu2O/Fe–O heterostructures exhibited photovoltaic characteristics (open circuit voltage, VOC =38–108mV and short circuit current density, JSC =0.74–1.58mA/cm2), although no appreciable differences were found on their solar cell parameters. The present results strongly suggest the potential of Fe–O based semiconductors for solar cell fabrication.


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