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Transport and transient photovoltaic properties of La0.4Ca0.6MnO3/Nb:SrTiO3 heterojunction at high temperature

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Abstract

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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Acknowledgements

This work has been supported by NCET, Beijing Natural Science Foundation (No. 4122064), Direct Grant from the Research Grants Council of the Hong Kong Special Administrative Region (Grant No. C001-2060295), and Foresight Fund Program from China University of Petroleum (Beijing).

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Authors and Affiliations

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, People’s Republic of China

    Hao Ni

  2. Laboratory of Optical Sensing and Detecting Technology, China University of Petroleum, Beijing, 102249, People’s Republic of China

    Hao Ni, Shilian Da, Kun Zhao & Songqing Zhao

  3. International Center for Materials Physics, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China

    Kun Zhao

  4. Department of Physics, The Chinese University of Hong Kong, Hong Kong, People’s Republic of China

    Yu Chau Kong & Hong Kuen Wong

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  1. Hao Ni
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  2. Shilian Da
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  3. Kun Zhao
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  4. Yu Chau Kong
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  5. Hong Kuen Wong
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  6. Songqing Zhao
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Correspondence to Kun Zhao.

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H. Ni and S. Da are the first authors.

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Ni, H., Da, S., Zhao, K. et al. Transport and transient photovoltaic properties of La0.4Ca0.6MnO3/Nb:SrTiO3 heterojunction at high temperature. Appl. Phys. A 108, 645–649 (2012). https://doi.org/10.1007/s00339-012-6944-0

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