Proton-Radiation Tolerant All-Perovskite Multijunction Solar Cells: Article No. 2102246

Felix Lang, Giles Eperon, Kyle Frohna, Elizabeth Tennyson, Amran Al-Ashouri, Georgios Kourkafas, Jurgen Bundesmann, Andrea Denker, Kevin West, Louise Hirst, Heinz-Christoph Neitzert, Samuel Stranks

Research output: Contribution to journalArticlepeer-review

25 Scopus Citations

Abstract

Radiation-resistant but cost-efficient, flexible, and ultralight solar sheets with high specific power (W g-1) are the "holy grail" of the new space revolution, powering private space exploration, low-cost missions, and future habitats on Moon and Mars. Herein, this study investigates an all-perovskite tandem photovoltaic (PV) technology that uses an ultrathin active layer (1.56 micrometers) but offers high power conversion efficiency, and discusses its potential for high-specific-power applications. This study demonstrates that all-perovskite tandems possess a high tolerance to the harsh radiation environment in space. The tests under 68 MeV proton irradiation show negligible degradation (<6%) at a dose of 1013 p+ cm-2 where even commercially available radiation-hardened space PV degrade >22%. Using high spatial resolution photoluminescence (PL) microscopy, it is revealed that defect clusters in GaAs are responsible for the degradation of current space-PV. By contrast, negligible reduction in PL of the individual perovskite subcells even after the highest dose studied is observed. Studying the intensity-dependent PL of bare low-gap and high-gap perovskite absorbers, it is shown that the VOC, fill factor, and efficiency potentials remain identically high after irradiation. Radiation damage of all-perovskite tandems thus has a fundamentally different origin to traditional space PV.
Original languageAmerican English
Number of pages14
JournalAdvanced Energy Materials
Volume11
Issue number41
DOIs
StatePublished - 2021

NREL Publication Number

  • NREL/JA-5900-81218

Keywords

  • all-perovskite tandem photovoltaics
  • proton-irradiation
  • radiation hardness
  • solar cells
  • space photovoltaics

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