Details

Autor(en) / Beteiligte

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

Titel

Defect Dynamics in Proton Irradiated CH3NH3PbI3 Perovskite Solar Cells

Ist Teil von

• Advanced electronic materials, 2017-02, Vol.3 (2), p.n/a

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. The enhancement of open‐circuit voltage, fill factor, and recombination lifetime is shown in photodegraded and high‐energy‐proton irradiated CH3CN3PbI3 perovskite solar cells. These enhancements result from lower nonradiative recombination losses in the proton‐irradiated devices. A reasonable mechanistic basis for the observed decrease of nonradiative recombination losses can be explained by the compensation of deep traps originated from the photodegradation of methylammonium molecules by proton induced Frenkel defects in the inorganic Pb–I framework.