Charge transfer state versus hot exciton dissociation in polymer-fullerene blended solar cells.

Lee, Jiye; Vandewal, Koen; Yost, Shane R; Bahlke, Matthias E; Goris, Ludwig; Baldo, Marc A; Manca, Jean V; Van Voorhis, Troy

Lee, Jiye; Vandewal, Koen; Yost, Shane R; Bahlke, Matthias E; Goris, Ludwig; Baldo, Marc A; Manca, Jean V; Van Voorhis, Troy.

Afiliación

Lee J; Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

J Am Chem Soc ; 132(34): 11878-80, 2010 Sep 01.

Article en En | MEDLINE | ID: mdl-20690623

RESUMEN

We examine the significance of hot exciton dissociation in two archetypical polymer-fullerene blend solar cells. Rather than evolving through a bound charge transfer state, hot processes are proposed to convert excitons directly into free charges. But we find that the internal quantum yields of carrier photogeneration are similar for both excitons and direct excitation of charge transfer states. The internal quantum yield, together with the temperature dependence of the current-voltage characteristics, is consistent with negligible impact from hot exciton dissociation.

Asunto(s)

Suministros de Energía Eléctrica; Fulerenos/química; Polímeros/química; Modelos Moleculares; Teoría Cuántica; Temperatura

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Polímeros / Suministros de Energía Eléctrica / Fulerenos Tipo de estudio: Prognostic_studies Idioma: En Revista: J Am Chem Soc Año: 2010 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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