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The capability of SnTe QDs as QDSCs working in the visible–NIR region and the effects of Eu-doping on improvement of solar cell parameters

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Abstract

The current work is the first effort to show the capability of SnTe quantum dots (QDs) in as a quantum dots solar cell device, which work in visible-near-infrared (NIR) regions, and improvement of the solar cell parameters by Eu-doping. Undoped and Eu-doped SnTe QDs with different Eu concentration from 2 to 6% were synthesized by a co-precipitation method. X-ray diffraction patterns and transmission electron microscopy images indicated that, crystallite and particle size of the samples were decreased by increasing of Eu content. Fourier-transform infrared (FTIR) and Raman spectroscopy results revealed that some vibration modes were appeared and disappeared by Eu-doping. According to the photoluminescence (PL) results, PL intensity of the doped sample was enhanced significantly in the green region in comparison to the PL intensity of the undoped sample. Ultraviolet-visible-near infrared spectroscopy results indicated that the pristine and Eu(2%)-doped samples don’t have any absorption in the visible region, while, Eu(4% and 6%)-doped SnTe QDs showed a good absorption in this region. Photocurrent measurements showed that, unlike the pristine and Eu(2%)-doped QDs, Eu(4% and 6%)-doped SnTe QDs showed a high responsivity in the visible and NIR regions. Solar cell measurements showed that, solar cell parameters such as short current density (Jsc), open circuit voltage (Voc), conversion efficiency values (η), and fill factor (FF) were increased by Eu-doping.

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Acknowledgements

R. Yousefi acknowledges the Islamic Azad University (I.A.U), Masjed-Soleiman Branch for its partial support in this research work.

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Authors and Affiliations

  1. Faculty of Physics, University of Kashan, Kashan, Iran

    Sara Khosravi Ghandomani & Bahram Khoshnevisan

  2. Department of Physics, Masjed-Soleiman Branch, Islamic Azad University (I.A.U), Masjed-Soleiman, Iran

    Ramin Yousefi

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  1. Sara Khosravi Ghandomani
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  2. Bahram Khoshnevisan
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  3. Ramin Yousefi
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Correspondence to Ramin Yousefi.

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Khosravi Ghandomani, S., Khoshnevisan, B. & Yousefi, R. The capability of SnTe QDs as QDSCs working in the visible–NIR region and the effects of Eu-doping on improvement of solar cell parameters. J Mater Sci: Mater Electron 29, 18989–18996 (2018). https://doi.org/10.1007/s10854-018-0023-z

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