Abstract
The current–voltage relation and photovoltaic properties of a heterojunction composed of Pr0.75Na0.25MnO3 (PNMO) and Nb-doped SrTiO3 (Nb–STO) are studied. The PNMO/Nb–STO heterojunction exhibits a good rectifying property. Meanwhile, the heterojunction also presents a significant photovoltaic effect. The maximum photovoltage is 28mV under the illumination of 70mW/cm2 light with the wavelength of 473nm at 20K. A qualitative explanation is given based on the analysis of junctions.
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