Proton radiation hardness of perovskite tandem photovoltaics

Felix R.L. Lange (Corresponding author), Marko Jošt, Kyle Frohna, Eike Kohnen, Amran Al-Ashouri, Alan R. Bowman, Tobias Bertram, Anna Belen Morales-Vilches, Dibyashree Koushik, Elizabeth M. Tennyson, K. Galkowski, Giovanni Landi, M. (Adriana) Creatore, Bernd Stannowski, Christian A. Kaufmann, Jürgen Bundesmann, Jörg Rappich, B. Rech, Andrea Denker, Steve Albrecht (Corresponding author)Heinz-Christoph Neitzert, Norbert H. Nickel, S.D. Stranks (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

86 Citations (Scopus)
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Monolithic [Cs0.05(MA0.17FA0.83)0.95]Pb(I0.83Br0.17)3/Cu(In,Ga)Se2(perovskite/CIGS) tandem solar cells promise high performance and can be processed on flexible substrates, enabling cost-efficient and ultra-lightweight space photovoltaics with power-to-weight and power-to-cost ratios surpassing those of state-of-the-art III-V semiconductor-based multijunctions. However, to become a viable space technology, the full tandem stack must withstand the harsh radiation environments in space. Here, we design tailored operando and ex situ measurements to show that perovskite/CIGS cells retain over 85% of their initial efficiency even after 68 MeV proton irradiation at a dose of 2x10 12p+/cm2. We use photoluminescence microscopy to show that the local quasi-Fermi-level splitting of the perovskite top cell is unaffected. We identify that the efficiency losses arise primarily from increased recombination in the CIGS bottom cell and the nickel-oxide-based recombination contact. These results are corroborated by measurements of monolithic perovskite/silicon-heterojunction cells, which severely degrade to 1% of their initial efficiency due to radiation-induced recombination centers in silicon.
Original languageEnglish
Pages (from-to)1054-1069
Number of pages16
Issue number5
Early online date6 Apr 2020
Publication statusPublished - 20 May 2020


  • degradation
  • multijunction solar cell
  • perovskite
  • perovskite/CIGS
  • perovskite/silicon
  • perovsktite tandem
  • radiation hardness
  • radiation-induced defects
  • space photovoltaics
  • tandem solar cell


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