Bipolaron formation in organic solar cells observed by pulsed electrically detected magnetic resonance.

Behrends, J; Schnegg, A; Lips, K; Thomsen, E A; Pandey, A K; Samuel, I D W; Keeble, D J

Behrends, J; Schnegg, A; Lips, K; Thomsen, E A; Pandey, A K; Samuel, I D W; Keeble, D J.

Afiliación

Behrends J; Institut für Silizium-Photovoltaik, Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany. jan.behrends@helmholtz-berlin.de

Phys Rev Lett ; 105(17): 176601, 2010 Oct 22.

Article en En | MEDLINE | ID: mdl-21231063

RESUMEN

We report the observation of a spin-dependent dark transport current, exhibiting spin coherence at room temperature, in a π-conjugated polymer-fullerene blend using pulsed electrically detected magnetic resonance. The resonance at g = 2.0028(3) is due to polarons in the polymer, and exhibits spin locking at high microwave fields. The presence of an excess of fullerene, and the operating voltage (1 V) used, suppresses negative polaron formation in the polymer. It is concluded that spin-dependent transport is due to the formation of positive bipolarons.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2010 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Estados Unidos

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