Defect Dynamics in Proton Irradiated CH3NH3PbI3 Perovskite Solar Cells

Viktor V. Brus, Felix Lang, Jürgen Bundesmann, Sophie Seidel, Andrea Denker, Bernd Rech, Giovanni Landi, Heinz C. Neitzert, Jörg Rappich, Norbert H. Nickel

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Perovskite solar cells have been shown to be of extraordinary radiation hardness, considering high energetic (68 MeV) proton irradiation with doses up to 1013 p cm−2. In this study electrical and photoelectrical properties of perovskite solar cells with and without proton irradiation are analyzed in detail. The results reveal that proton irradiation improves the open circuit voltage, fill factor, and recombination lifetime of photogenerated charge carriers in perovskite solar cells. These enhancements are mainly a result of the lower nonradiative recombination losses in the proton irradiated devices. The proton treatment creates shallow traps, which may be associated with the proton induced point defects due to the displacements of atoms in the inorganic Pb–I framework, which act as unintentional doping sources and partially compensate deep traps originated from the photodegradation of methylammonium molecules.

Original languageEnglish
Article number1600438
JournalAdvanced Electronic Materials
Volume3
Issue number2
DOIs
Publication statusPublished - Feb 1 2017
Externally publishedYes

Keywords

  • perovskites
  • photodegradation
  • proton irradiation
  • solar cells

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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