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Oxygen incorporation in rubrene single crystals.

ABSTRACT: Single crystal rubrene is a model organic electronic material showing high carrier mobility and long exciton lifetime. These properties are detrimentally affected when rubrene is exposed to intense light under ambient conditions for prolonged periods of time, possibly due to oxygen up-take. Using photoelectron, scanning probe and ion-based methods, combined with an isotopic oxygen exposure, we present direct evidence of the light-induced reaction of molecular oxygen with single crystal rubrene. Without a significant exposure to light, there is no reaction of oxygen with rubrene for periods of greater than a year; the crystal's surface (and bulk) morphology and chemical composition remain essentially oxygen-free. Grand canonical Monte Carlo computations show no sorbtion of gases into the bulk of rubrene crystal. A mechanism for photo-induced oxygen inclusion is proposed.

SUBMITTER: Mastrogiovanni DD

PROVIDER: S-EPMC4007094 | biostudies-literature | 2014 May

REPOSITORIES: biostudies-literature

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Oxygen incorporation in rubrene single crystals.

Mastrogiovanni Daniel D T DD Mayer Jeff J Wan Alan S AS Vishnyakov Aleksey A Neimark Alexander V AV Podzorov Vitaly V Feldman Leonard C LC Garfunkel Eric E

Scientific reports 20140502

Single crystal rubrene is a model organic electronic material showing high carrier mobility and long exciton lifetime. These properties are detrimentally affected when rubrene is exposed to intense light under ambient conditions for prolonged periods of time, possibly due to oxygen up-take. Using photoelectron, scanning probe and ion-based methods, combined with an isotopic oxygen exposure, we present direct evidence of the light-induced reaction of molecular oxygen with single crystal rubrene. ...[more]

PMID: 24786311

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