title: Reversible degradation in ITO-containing organic photovoltaics under concentrated sunlight.
abstract: Stabilities of ITO-containing and ITO-free organic solar cells were investigated under simulated AM 1.5G illumination and under concentrated natural sunlight. In both cases ITO-free devices exhibit high stability, while devices containing ITO show degradation of their photovoltaic performance. The accelerated degradation under concentrated sunlight (of up to 20 suns) in ITO-containing devices was found to be reversible. Dark exposure of degraded samples can partly restore performance. A possible underlying mechanism for such a phenomenon is discussed.
authors.affiliation: Holst Centre - Solliance, 5605 KN Eindhoven, PO Box 8550, The Netherlands. yulia.galagan@tno.nl.
authors.forename: Yulia
authors.initials: Y
authors.lastname: Galagan
authors.forename: Asaf
authors.initials: A
authors.lastname: Mescheloff
authors.forename: Sjoerd C
authors.initials: SC
authors.lastname: Veenstra
authors.forename: Ronn
authors.initials: R
authors.lastname: Andriessen
authors.forename: Eugene A
authors.initials: EA
authors.lastname: Katz