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Tytuł artykułu

Rutherford Backscattering Spectroscopy of Mass Transport by Transformation of PbI2into CH3NH3PbI3within np-TiO2

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
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.
Wydawca

Czasopismo
Rocznik
Tom
1
Numer
1
Opis fizyczny
Daty
otrzymano
2014-09-30
zaakceptowano
2014-11-25
online
2014-12-22
Twórcy
autor
  • Helmholtz-Zentrum Berlin für
    Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin,
    Germany
autor
  • Helmholtz-Zentrum Berlin für
    Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin,
    Germany
  • Tallinn University of Technology, Department of Materials
    Science, Ehitajate tee 5, Tallinn 19086, Estonia
  • Helmholtz-Zentrum Berlin für
    Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin,
    Germany
  • Department of Materials Science,
    Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
autor
  • Helmholtz-Zentrum Berlin für
    Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin,
    Germany
  • Helmholtz-Zentrum Berlin für
    Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin,
    Germany
  • Department of Materials Science,
    Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_hyma-2014-0002
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