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Appraisement of Crystal Expansion in CH3 NH3 PbI3 on Doping: Improved Photovoltaic Properties.
Journal article

Appraisement of Crystal Expansion in CH3 NH3 PbI3 on Doping: Improved Photovoltaic Properties.

  • Salado M Basque Center for Materials, Applications and Nanostructures, Bld. Martina Casiano, UPV/EHU Science Park, Barrio Sarriena s/n, 48940, Leioa, Spain.
  • Kazim S Basque Center for Materials, Applications and Nanostructures, Bld. Martina Casiano, UPV/EHU Science Park, Barrio Sarriena s/n, 48940, Leioa, Spain.
  • Nazeeruddin MK Group for Molecular Engineering of Functional Materials, Swiss Federal Institute of Technology Lausanne (EPFL), EPFL Valais Wallis, 1951, Sion, Switzerland.
  • Ahmad S Basque Center for Materials, Applications and Nanostructures, Bld. Martina Casiano, UPV/EHU Science Park, Barrio Sarriena s/n, 48940, Leioa, Spain.
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  • 2019-02-19
Published in:
  • ChemSusChem. - 2019
charge transfer dynamics
interface modification
perovskite solar cells
surface passivation
thin film solar cells
English Three-dimensional hybrid perovskite materials (CH3 NH3 PbI3 ) suffer from intrinsic instability owing to organic cation evaporation and ion migration. The inclusion of a large organic cation such as guanidinium has been probed to stabilize the structure. This work proposes the inclusion of imidazolium iodide (C3 N2 H5 I) as an organic cation inside the CH3 NH3 PbI3 matrix, as a reservoir to control the spontaneous loss of iodide. The introduction of imidazolium iodide in amounts below 20 % has an impact on the crystallization process but not on the optical properties. It also positively controls non-radiative recombination and improves the open-circuit voltage of the solar cells. The present study paves way for a deeper insight into the limit of multi-dimensional perovskite to further push the performance.
Language
  • English
Open access status
green
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Persistent URL
https://sonar.rero.ch/global/documents/215217
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