Charge carrier mobility and lifetime versus composition of conjugated polymer/fullerene bulk-heterojunction solar cells

G. Dennler*, A. J. Mozer, G. Juška, A. Pivrikas, R. Österbacka, A. Fuchsbauer, N. S. Sariciftci

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

149 Citations (Scopus)

Abstract

Charge carrier mobility (μ), recombination kinetics, and lifetime (τ) have been investigated with the photo-induced charge carrier extraction by linearly increasing voltage technique (photo-CELIV) in blends of poly[2-methoxy-5-(3,7-dimethyloctyloxy)-phenylene vinylene] (MDMO-PPV) and 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)-C61(PCBM). Different MDMO-PPV/PCBM ratios have been studied showing that increasing the PCBM content induces an increase of the photo-CELIV mobility up to two orders of magnitude. Simultaneously, the lifetime of the charge carriers decreases in such a way that the product μ × τ appears almost constant independently of the blend composition. Recombination kinetics close to the Langevin one is observed for all PCBM concentrations studied.

Original languageEnglish
Pages (from-to)229-234
Number of pages6
JournalOrganic Electronics
Volume7
Issue number4
DOIs
Publication statusPublished - Aug 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • Bulk-heterojunction
  • Conjugated polymer
  • Fullerene
  • Lifetime
  • Mobility
  • Organic solar cells
  • Recombination kinetics

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