Rutherford Backscattering Spectroscopy of Mass Transport by Transformation of PbI2 into CH3NH3PbI3 within np-TiO2

Albert Juma, F Lang, V Somsongkul, Thomas Dittrich, M Arunchaiya

    Research output: Contribution to journalArticle

    Abstract

    Mass transport during transformation of PbI2 infiltrated in nanoporous TiO2
    into CH3NH3PbI3 has been investigated by Rutherford backscattering spectroscopy (RBS). Fast initial reaction kinetics were confirmed using optical ex-situ and in-situ measurements. Mapping with energy dispersive X-ray spectroscopy of the cross section of samples revealed a homogeneous PbI2
    infiltration in nanoporous TiO2 before transformation but an accumulation of Pb and I at the surface after transformation, in accordance with a depletion of Pb and I in a near surface region. Quantitative depth profiles of Pb and I were obtained from RBS analysis. An instant degradation of CH3NH3PbI3 to PbI2
    and volatiles upon ion radiation was found. The concentration profiles of
    Pb could be simulated with a one dimensional diffusion model taking into account an effective diffusion coefficient of Pb in the nanocomposite (about 1.5⋅10-11 cm²/s) as well as a parameter considering frazzling at the surface due to formation of crystallites.
    Original languageEnglish
    Pages (from-to)52-61
    JournalHybrid Materials
    Volume1
    Issue number1
    DOIs
    Publication statusPublished - 2014

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    backscattering
    spectroscopy
    profiles
    in situ measurement
    crystallites
    nanocomposites
    depletion
    reaction kinetics
    diffusion coefficient
    degradation
    cross sections
    radiation
    ions
    x rays
    energy

    Cite this

    Juma, Albert ; Lang, F ; Somsongkul, V ; Dittrich, Thomas ; Arunchaiya, M. / Rutherford Backscattering Spectroscopy of Mass Transport by Transformation of PbI2 into CH3NH3PbI3 within np-TiO2. In: Hybrid Materials. 2014 ; Vol. 1, No. 1. pp. 52-61.
    @article{c86eca98e94b4000af6262eca70c8d39,
    title = "Rutherford Backscattering Spectroscopy of Mass Transport by Transformation of PbI2 into CH3NH3PbI3 within np-TiO2",
    abstract = "Mass transport during transformation of PbI2 infiltrated in nanoporous TiO2 into CH3NH3PbI3 has been investigated by Rutherford backscattering spectroscopy (RBS). Fast initial reaction kinetics were confirmed using optical ex-situ and in-situ measurements. Mapping with energy dispersive X-ray spectroscopy of the cross section of samples revealed a homogeneous PbI2infiltration in nanoporous TiO2 before transformation but an accumulation of Pb and I at the surface after transformation, in accordance with a depletion of Pb and I in a near surface region. Quantitative depth profiles of Pb and I were obtained from RBS analysis. An instant degradation of CH3NH3PbI3 to PbI2 and volatiles upon ion radiation was found. The concentration profiles ofPb could be simulated with a one dimensional diffusion model taking into account an effective diffusion coefficient of Pb in the nanocomposite (about 1.5⋅10-11 cm²/s) as well as a parameter considering frazzling at the surface due to formation of crystallites.",
    author = "Albert Juma and F Lang and V Somsongkul and Thomas Dittrich and M Arunchaiya",
    year = "2014",
    doi = "10.2478/hyma-2014-0002",
    language = "English",
    volume = "1",
    pages = "52--61",
    journal = "Hybrid Materials",
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    Rutherford Backscattering Spectroscopy of Mass Transport by Transformation of PbI2 into CH3NH3PbI3 within np-TiO2. / Juma, Albert; Lang, F; Somsongkul, V; Dittrich, Thomas; Arunchaiya, M.

    In: Hybrid Materials, Vol. 1, No. 1, 2014, p. 52-61.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Rutherford Backscattering Spectroscopy of Mass Transport by Transformation of PbI2 into CH3NH3PbI3 within np-TiO2

    AU - Juma, Albert

    AU - Lang, F

    AU - Somsongkul, V

    AU - Dittrich, Thomas

    AU - Arunchaiya, M

    PY - 2014

    Y1 - 2014

    N2 - Mass transport during transformation of PbI2 infiltrated in nanoporous TiO2 into CH3NH3PbI3 has been investigated by Rutherford backscattering spectroscopy (RBS). Fast initial reaction kinetics were confirmed using optical ex-situ and in-situ measurements. Mapping with energy dispersive X-ray spectroscopy of the cross section of samples revealed a homogeneous PbI2infiltration in nanoporous TiO2 before transformation but an accumulation of Pb and I at the surface after transformation, in accordance with a depletion of Pb and I in a near surface region. Quantitative depth profiles of Pb and I were obtained from RBS analysis. An instant degradation of CH3NH3PbI3 to PbI2 and volatiles upon ion radiation was found. The concentration profiles ofPb could be simulated with a one dimensional diffusion model taking into account an effective diffusion coefficient of Pb in the nanocomposite (about 1.5⋅10-11 cm²/s) as well as a parameter considering frazzling at the surface due to formation of crystallites.

    AB - Mass transport during transformation of PbI2 infiltrated in nanoporous TiO2 into CH3NH3PbI3 has been investigated by Rutherford backscattering spectroscopy (RBS). Fast initial reaction kinetics were confirmed using optical ex-situ and in-situ measurements. Mapping with energy dispersive X-ray spectroscopy of the cross section of samples revealed a homogeneous PbI2infiltration in nanoporous TiO2 before transformation but an accumulation of Pb and I at the surface after transformation, in accordance with a depletion of Pb and I in a near surface region. Quantitative depth profiles of Pb and I were obtained from RBS analysis. An instant degradation of CH3NH3PbI3 to PbI2 and volatiles upon ion radiation was found. The concentration profiles ofPb could be simulated with a one dimensional diffusion model taking into account an effective diffusion coefficient of Pb in the nanocomposite (about 1.5⋅10-11 cm²/s) as well as a parameter considering frazzling at the surface due to formation of crystallites.

    U2 - 10.2478/hyma-2014-0002

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    M3 - Article

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    JO - Hybrid Materials

    JF - Hybrid Materials

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    ER -