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Calculation and Fabrication of a CH3NH3Pb(SCN)xI3−x Perovskite Film as a Light Absorber in Carbon-based Hole-transport-layer-free Perovskite Solar Cells

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Abstract

CH3NH3Pb(SCN)xI3−x films were prepared using a hot-casting method with five different Pb(SCN)2/PbI2 levels (x = 0, 0.25, 0.5, 1 and 2). Substitution of SCN− in the CH3NH3PbI3 structures induces a film color transformation from black to yellow. UV vis spectra of CH3NH3Pb(SCN)xI3−x films display an increased band gap from 1.59 eV (pure CH3NH3PbI3 film) to 2.37 eV (MAPb(SCN)2I films). Experimental XRD spectra of CH3NH3Pb(SCN)xI3−x films for increasing SCN− levels show a reduced angle of the (110) plane in the same trend as for the simulated tetragonal CH3NH3Pb(SCN)xI3−x structures. The calculated bandgap of simulated tetragonal CH3NH3Pb(SCN)xI3−x structures also increases with the SCN− concentration. Maximal efficiency, 4.56%, was gained from a carbon-based hole-transport layer (HTL)-free CH3NH3PbI3 (x = 0) perovskite solar cell. This is attributed to the low bandgap of CH3NH3PbI3 (1.59 eV). Although, the efficiency of the carbon-based HTL-free CH3NH3Pb(SCN)xI3−x solar cells decreases with increasing SCN− ratio, the excellent solar cell stability was obtained from carbon-based HTL-free CH3NH3Pb(SCN)xI3−x (x = 0.25, 0.5, 1 and 2) solar cells. This should be influenced by the presence of the hydrogen bonds between H and S and/or H and N in the CH3NH3Pb(SCN)xI3−x structures. The carbon-based HTL-free CH3NH3Pb(SCN)0.5I2.5 solar cell delivers a promising efficiency of 3.07%, and its efficiency increases by 11.40% of its initial value after 30-day storage.

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Acknowledgments

This work was supported by the Thailand Center of Excellence in Physics (ThEP), by the Research Network NANOTEC (RNN) program of the National Nanotechnology Center (NANOTEC) and Khon Kaen University by the National Nanotechnology Center (NANOTEC), NSTDA, Srinakharinwirot University (contract No. 676/2563), Ministry of Higher Education, Science, Research and Innovation (MHESI), Thailand, through its program of Center of Excellence Network. P. Kumlangwan would like to thank the Thailand Graduate Institute of Science and Technology (TGIST) for a NSTDA scholarship in support of her Master of Science degree under the scholar contract No. TGIST 01-57-006.

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Authors and Affiliations

  1. Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand

    Pantiwa Kumlangwan, Viyada Harnchana, Pornjuk Srepusharawoot, Wirat Jarernboon & Vittaya Amornkitbamrung

  2. Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand

    Pitphichaya Suksangrat, Madsakorn Towannang, Narit Faibut, Viyada Harnchana, Pornjuk Srepusharawoot, Wirat Jarernboon & Vittaya Amornkitbamrung

  3. Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Research Network of NANOTEC-KKU (RNN), Khon Kaen University, Khon Kaen, 40002, Thailand

    Viyada Harnchana, Pornjuk Srepusharawoot, Wirat Jarernboon, Samuk Pimanpang & Vittaya Amornkitbamrung

  4. Thailand Center of Excellence in Physics (ThEP), Chiang Mai University, Chiang Mai, 50202, Thailand

    Viyada Harnchana, Pornjuk Srepusharawoot, Wirat Jarernboon, Samuk Pimanpang & Vittaya Amornkitbamrung

  5. Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkapi Bangkok, 10240, Thailand

    Apiwat Chompoosor

  6. National Nanotechnology Center (NANOTEC), National Science and Technology (NSTDA), Khlong Luang, Pathumthani, 12120, Thailand

    Pisist Kumnorkaew

  7. Department of Physics, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand

    Samuk Pimanpang

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  1. Pantiwa Kumlangwan
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  2. Pitphichaya Suksangrat
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Corresponding authors

Correspondence to Wirat Jarernboon or Samuk Pimanpang.

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40042_2020_4682_MOESM1_ESM.pdf

Calculation and Fabrication of a CH3NH3Pb(SCN)xI3−x Perovskite Film as a Light Absorber in Carbon-based Hole-transport-layer-free Perovskite Solar Cells

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Kumlangwan, P., Suksangrat, P., Towannang, M. et al. Calculation and Fabrication of a CH3NH3Pb(SCN)xI3−x Perovskite Film as a Light Absorber in Carbon-based Hole-transport-layer-free Perovskite Solar Cells. J. Korean Phys. Soc. 77, 1210–1217 (2020). https://doi.org/10.3938/jkps.77.1210

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  • DOI: https://doi.org/10.3938/jkps.77.1210

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