Taking Control of Ion Transport in Halide Perovskite Solar Cells

Aron Walsh, Samuel D. Stranks

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Lead halide perovskites are mixed electron-ion conductors that support high rates of solid-state ion transport at room temperature, in addition to conventional electron and hole conduction. Mass transport mediated by charged defects is responsible for unusual phenomena such as current-voltage hysteresis in photovoltaic devices, anomalous above-bandgap photovoltages, light-induced lattice expansion and phase separation, self-healing, and rapid chemical conversion between halides. We outline the principles that govern ion transport in perovskite solar cells including intrinsic (point and extended defects) and extrinsic (light, heat, electrical fields, and chemical gradients) factors. These microscopic processes underpin a wide range of reported observations, including photoionic conductivity, and offer valuable directions for both limiting ion transport, where required, and harnessing it to enable new functionality.

Original languageEnglish
Pages (from-to)1983-1990
Number of pages8
JournalACS Energy Letters
Volume3
Issue number8
DOIs
Publication statusPublished - 2018 Aug 10

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Ions
Defects
Electrons
Phase separation
Hysteresis
Energy gap
Mass transfer
Lead
Perovskite solar cells
Electric potential
Temperature
Hot Temperature
Direction compound

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

Cite this

Walsh, Aron ; Stranks, Samuel D. / Taking Control of Ion Transport in Halide Perovskite Solar Cells. In: ACS Energy Letters. 2018 ; Vol. 3, No. 8. pp. 1983-1990.
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Taking Control of Ion Transport in Halide Perovskite Solar Cells. / Walsh, Aron; Stranks, Samuel D.

In: ACS Energy Letters, Vol. 3, No. 8, 10.08.2018, p. 1983-1990.

Research output: Contribution to journalArticle

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