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Absence of photoinduced charge transfer in blends of PbSe quantum dots and conjugated polymers.
Noone, Kevin M; Anderson, Nicholas C; Horwitz, Noah E; Munro, Andrea M; Kulkarni, Abhishek P; Ginger, David S.
Afiliação
  • Noone KM; Department of Chemistry, University of Washington, Seattle, WA 98195-1700, USA.
ACS Nano ; 3(6): 1345-52, 2009 Jun 23.
Artigo em Inglês | MEDLINE | ID: mdl-19449837
ABSTRACT
We use photoluminescence (PL) quenching and photoinduced absorption (PIA) spectroscopy to study charge transfer in bulk heterojunction blends of PbSe quantum dots with the semiconducting polymers poly-3-hexylthiophene (P3HT) and poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-para-phenylene vinylene] (MDMO-PPV). PIA spectra from the PbSe blends are compared to spectra from similar blends of the polymers with phenyl-C(61)-butyric acid methyl ester (PCBM) and blends with CdSe quantum dots. We find that the MDMO-PPV PL is quenched, and the PL lifetime is shortened upon addition of PbSe quantum dots, while the PL of the P3HT is unaffected upon blending. However, for PbSe blends with both polymers, the PIA spectra show very little polaronic signal, suggesting that few, if any, long-lived charges are being produced by photoinduced charge transfer.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: ACS Nano Ano de publicação: 2009 Tipo de documento: Artigo País de afiliação: Estados Unidos