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Photocurrent analysis of AgIn5S8 crystal

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Abstract

The photocurrent (PC) spectrum of AgIn5S8 crystal consists of a single peak, which provides to determine the bandgap energy by applying the Moss rule. The temperature dependence of the bandgap energy was also calculated. The PC dramatically increased by pre-illumination with light having wavelength corresponding to the bandgap of AgIn5S8. The temperature-dependent PC of the sample was measured at different temperatures from 80 to 300 K and the PC spectrum consisted a single broad peak. Thermal quenching of the PC was observed to start at ∼105 K and the PC completely quenched at ∼180 K. The quenching mechanism was discussed in terms of the two-centre model. The height of the PC peak rised linearly with applied voltage up to 5.0 V under constant intensity of light. Similarly, the dark current–voltage characteristics consisted of a single region dominating an ohmic behaviour, and no space charge limited region was apparent at various temperatures up to 20 V.

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, Gazi University, 06500, Ankara, Turkey

    MAHMUT BUCURGAT

  2. Department of Physics, Faculty of Arts and Sciences, Middle East Technical University, 06531, Ankara, Turkey

    SELAHATTIN OZDEMIR

  3. Department of Physics Engineering, Hacettepe University, 06800, Ankara, Turkey

    TEZER FIRAT

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  1. MAHMUT BUCURGAT
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  2. SELAHATTIN OZDEMIR
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  3. TEZER FIRAT
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Correspondence to MAHMUT BUCURGAT.

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BUCURGAT, M., OZDEMIR, S. & FIRAT, T. Photocurrent analysis of AgIn5S8 crystal. Bull Mater Sci 39, 1521–1529 (2016). https://doi.org/10.1007/s12034-016-1302-z

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  • DOI: https://doi.org/10.1007/s12034-016-1302-z

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