Dynamics of Photoinduced Degradation of Perovskite Photovoltaics: From Reversible to Irreversible Processes

Mark V. Khenkin, K.M. Anoop, Iris Visoly-Fisher, Sofiya Kolusheva, Yulia Galagan, Francesco Di Giacomo, Olivera Vukovic, Bhushan Ramesh Patil, Golnaz Sherafatipour, Vida Turkovic, Horst Günter Rubahn, Morten Madsen, Alexander V. Mazanik, Eugene A. Katz (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

96 Citations (Scopus)

Abstract

The operational stability of perovskite solar cells (PSCs) remains a limiting factor in their commercial implementation. We studied the long-term outdoor stability of ITO/SnO2/Cs0.05((CH3NH3)0.15(CH(NH2)2)0.85)0.95PbI2.55Br0.45/spiro-OMeTAD/Au cells, as well as the dynamics of their degradation, under simulated sunlight indoors and their recovery in the dark. The extent of overall degradation was found to depend on processes occurring both under illumination and in the dark, i.e., during the daytime and nighttime, with the dynamics varying with cell aging. Full recovery of efficiency in the dark was observed for cells at early degradation stages. Further cell degradation resulted in recovery times much longer than one night, appearing as irreversible degradation under real operational conditions. At later degradation stages, very different dynamics were observed: short-circuit current density and fill factor exhibited a pronounced drop upon light turn-off but strong improvement under subsequent illumination. The interplay of reversible and irreversible degradation processes with different recovery dynamics was demonstrated to result in changes in the cell's diurnal PCE dependence during its operational lifespan under real sunlight conditions.

Original languageEnglish
Pages (from-to)799-806
Number of pages8
JournalACS Applied Energy Materials
Volume1
Issue number2
DOIs
Publication statusPublished - 26 Feb 2018

Bibliographical note

Funding Information:
This work was supported by the European Commission’s StableNextSol COST Action MP1307. The research was funded in part by Israel’s Ministry of National Infrastructures, Water and Energy Resources (Grant No. 0399202/215-11-037) and by the Adelis Foundation. E.A.K. and M.V.K. also thank the United States−Israel Binational Science Foundation. A.V.M. is grateful to the Belarusian Republican Foundation for Fundamental Research (Grant No. F16MS-015). Y.G. appreciates support by Solliance, a partnership of R&D organizations from The Netherlands, Belgium, and Germany working in thin film photovoltaic solar energy. G.S., M.M., and H.-G.R. acknowledge funding from the European Union Seventh Framework Programme under Grant Agreement No. 607232 (THINFACE). V.T. acknowledges “Det Frie Forskningsrad̊ ”, DFF FTP, for funding of the project Stabil-O.

Funding

This work was supported by the European Commission’s StableNextSol COST Action MP1307. The research was funded in part by Israel’s Ministry of National Infrastructures, Water and Energy Resources (Grant No. 0399202/215-11-037) and by the Adelis Foundation. E.A.K. and M.V.K. also thank the United States−Israel Binational Science Foundation. A.V.M. is grateful to the Belarusian Republican Foundation for Fundamental Research (Grant No. F16MS-015). Y.G. appreciates support by Solliance, a partnership of R&D organizations from The Netherlands, Belgium, and Germany working in thin film photovoltaic solar energy. G.S., M.M., and H.-G.R. acknowledge funding from the European Union Seventh Framework Programme under Grant Agreement No. 607232 (THINFACE). V.T. acknowledges “Det Frie Forskningsrad̊ ”, DFF FTP, for funding of the project Stabil-O.

Keywords

  • light soaking
  • perovskite solar cells
  • recovery dynamics
  • reversible and irreversible degradation
  • stability

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