Room temperature preparation of δ-phase CsSn1−xPbxI3 films for hole–transport in solid-state dye-sensitized solar cells

  • Pornpanarat Ardchongtong
  • Pantiwa Kumlangwan
  • Madsakorn Towannang
  • Pitphichaya Suksangrat
  • Pornjuk Srepusharawoot
  • Narid Prachumrak
  • Pawinee Klangtakai
  • Samuk Pimanpang
  • Vinich Promarak
  • Vittaya Amornkitbamrung


CsSn1−xPbxI3 films were prepared from mixed CsI, SnI2 and/or PbI2 solutions at five different Pb/Sn ratios (x = 0, 0.2, 0.5, 0.8 and 1) at room temperature. The color of the CsSn1−xPbxI3 films varied with their Pb/Sn ratios. At a Pb/Sn ratio of 0.5, CsSn0.5Pb0.5I3 had the darkest color, whereas films at other Pb/Sn ratios displayed dark brown or yellowish colors. The XRD spectra of the as-prepared CsSn1−xPbxI3 films matched the δ-phase (yellow-phase) nonperovskite structure quite well. Solid-state dye-sensitized solar cells (S-DSSCs) were assembled by directly dropping the mixed CsI, SnI2 and/or PbI2 solution onto TiO2-coated-dye electrodes and drying them at room temperature. A CsSn0.5Pb0.5I3 based S-DSSC generated the highest efficiency (3.47%) of the five conditions (CsSn1−xPbxI3, x = 0, 0.2, 0.5, 0.8 and 1). This is attributed to the dark color and good continuity of the CsSn0.5Pb0.5I3 film, its high shunt-resistance (10,377.10 Ω) and high incident-photon collecting efficiency of CsSn0.5Pb0.5I3 based S-DSSCs.



This work was supported by The Thailand Research Fund, Khon Kaen University and Srinakharinwirot University (TRF, RSA5880035), by the National Research of Council Thailand and Srinakharinwirot University (#024/2561), by the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission, through the Advanced Functional Materials Cluster of Khon Kaen University, by the Center of Excellence in Physics (ThEP), by the Integrated Nanotechnology Center, Khon Kaen University, and by the National Nanotechnology Center (NANOTEC), NSTD, Ministry of Science and Technology, Thailand, through its program of Center of Excellence Network.


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Authors and Affiliations

  • Pornpanarat Ardchongtong
    • 1
  • Pantiwa Kumlangwan
    • 1
  • Madsakorn Towannang
    • 2
  • Pitphichaya Suksangrat
    • 2
  • Pornjuk Srepusharawoot
    • 1
    • 2
    • 3
    • 4
    • 5
  • Narid Prachumrak
    • 6
  • Pawinee Klangtakai
    • 1
    • 2
    • 3
    • 4
    • 5
  • Samuk Pimanpang
    • 3
    • 4
    • 5
    • 7
  • Vinich Promarak
    • 8
  • Vittaya Amornkitbamrung
    • 1
    • 2
    • 3
    • 4
    • 5
  1. 1.Materials Science and Nanotechnology Program, Faculty of ScienceKhon Kean UniversityKhon KaenThailand
  2. 2.Department of Physics, Faculty of ScienceKhon Kean UniversityKhon KaenThailand
  3. 3.Nanotec-KKU Center of Excellence on Advanced Nanomaterials for Energy Production and StorageKhon KaenThailand
  4. 4.Integrated Nanotechnology Research CenterKhon Kaen UniversityKhon KaenThailand
  5. 5.Thailand Center of Excellence in PhysicsCommission on Higher EducationBangkokThailand
  6. 6.Department of Chemistry, Faculty of ScienceUdon Thani Rajabhat UniversityUdon ThaniThailand
  7. 7.Department of Physics, Faculty of ScienceSrinakharinwirot UniversityBangkokThailand
  8. 8.School of Molecular Science and EngineeringVidyasirimedhi Institute of Science and EngineeringRayongThailand

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