We have investigated the electronic transport and transient photovoltaic properties on the La0.4Ca0.6MnO3/Nb(0.05 wt%):SrTiO3 heterojunction at high temperatures up to 723 K. The temperature-dependent reversal of the rectifying polarity and the decrease of the photosensitivity and response time were observed in the junction with increasing temperature from 293 to 723 K. The mechanism of the energy-band structure evolvement with increasing temperature is presented to understand the experimental results.
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