Photoinduced charge carrier generation in a poly(3-hexylthiophene) and methanofullerene bulk heterojunction investigated by time-resolved terahertz spectroscopy

Xin Ai, Matthew C. Beard, Kelly P. Knutsen, Sean E. Shaheen, Gary Rumbles, Randy J. Ellingson

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

We report on the ultrafast photoinduced charge separation processes in varying compositions of poly(3-hexylthiophene) (P3HT) blended with the electron acceptor [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). Through the use of time-resolved terahertz spectroscopy, the time- and frequency-dependent complex photoconductivity is measured for samples with PCBM weight fractions (WPCBM) of 0, 0.2, 0.5, and 0.8. By analysis of the frequency-dependent complex conductivity, both the charge carrier yield and the average charge carrier mobility have been determined analytically and indicate a short (

Original languageEnglish
Pages (from-to)25462-25471
Number of pages10
JournalJournal of Physical Chemistry B
Volume110
Issue number50
DOIs
Publication statusPublished - Dec 21 2006

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Terahertz spectroscopy
Butyric acid
butyric acid
Charge carriers
Heterojunctions
heterojunctions
esters
charge carriers
Esters
Butyric Acid
Carrier mobility
Photoconductivity
polarization (charge separation)
carrier mobility
photoconductivity
spectroscopy
conductivity
Electrons
Chemical analysis
electrons

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Photoinduced charge carrier generation in a poly(3-hexylthiophene) and methanofullerene bulk heterojunction investigated by time-resolved terahertz spectroscopy. / Ai, Xin; Beard, Matthew C.; Knutsen, Kelly P.; Shaheen, Sean E.; Rumbles, Gary; Ellingson, Randy J.

In: Journal of Physical Chemistry B, Vol. 110, No. 50, 21.12.2006, p. 25462-25471.

Research output: Contribution to journalArticle

Ai, Xin ; Beard, Matthew C. ; Knutsen, Kelly P. ; Shaheen, Sean E. ; Rumbles, Gary ; Ellingson, Randy J. / Photoinduced charge carrier generation in a poly(3-hexylthiophene) and methanofullerene bulk heterojunction investigated by time-resolved terahertz spectroscopy. In: Journal of Physical Chemistry B. 2006 ; Vol. 110, No. 50. pp. 25462-25471.
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