Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

Regioregular poly(3-(4′-(1″,4″,7″-trioxaoctyl)phenyl)thiophenes) (PEOPTs) exhibit interesting properties for the use in polymer electronics. Exposing thin films of the amorphous, disordered phase (orange phase) of the “as prepared” polymer to chloroform vapor or annealing them by heat treatment results in a redshift of the absorption maximum due to the formation of nanocrystals in an ordered phase (blue phase). As such, PEOPT thus is a very interesting conjugated polymeric material, which exhibits two different phases with well-defined order/disorder characters on one-and-the-same material. This property opens up the unique possibility to investigate the role of order/disorder on the photoexcited pattern without being obscured by the differences in chemical structure by using different materials with different crystallinity. The fact, that blue phase PEOPT exhibits absorption edges at relatively low energies around 1.8 eV, thereby demonstrating an enhanced spectral absorption range as compared to the orange phase, makes them attractive for use in photodiodes and solar cells as well. The photoinduced charge generation efficiency in both phases of PEOPT is significantly enhanced by the addition of a strong electron acceptor such as fullerene C60, as observed by quenching of the luminescence and by photoinduced absorption measurements in the infrared and uv–visible regime. The average number and the lifetime of photoinduced carriers in composites of PEOPT with a methanofullerene [6,6]-phenyl C61–butyric acid methyl ester (PCBM) are found to depend on the crystallinity of PEOPT in thin films, which gives rise to charged photoexcitations delocalized between polymer chains. Stronger bimolecular recombination in composites of the blue phase PEOPT with PCBM is observed as compared to the orange phase PEOPT/PCBM films. The origin of this enhanced recombination is found to be related to the hole mobility of the polymer.

Bibliography

Brabec, C. J., Winder, C., Scharber, M. C., Sariciftci, N. S., Hummelen, J. C., Svensson, M., & Andersson, M. R. (2001). Influence of disorder on the photoinduced excitations in phenyl substituted polythiophenes. The Journal of Chemical Physics, 115(15), 7235–7244.

Authors 7
  1. Christoph J. Brabec (first)
  2. Christoph Winder (additional)
  3. Markus C. Scharber (additional)
  4. N. Serdar Sariciftci (additional)
  5. Jan C. Hummelen (additional)
  6. Mattias Svensson (additional)
  7. Mats R. Andersson (additional)
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Dates
Type When
Created 23 years ago (July 26, 2002, 8:45 a.m.)
Deposited 1 year, 6 months ago (Feb. 7, 2024, 10:19 a.m.)
Indexed 1 month, 4 weeks ago (June 24, 2025, 12:45 p.m.)
Issued 23 years, 10 months ago (Oct. 15, 2001)
Published 23 years, 10 months ago (Oct. 15, 2001)
Published Print 23 years, 10 months ago (Oct. 15, 2001)
Funders 0

None

@article{Brabec_2001, title={Influence of disorder on the photoinduced excitations in phenyl substituted polythiophenes}, volume={115}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1404984}, DOI={10.1063/1.1404984}, number={15}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Brabec, Christoph J. and Winder, Christoph and Scharber, Markus C. and Sariciftci, N. Serdar and Hummelen, Jan C. and Svensson, Mattias and Andersson, Mats R.}, year={2001}, month=oct, pages={7235–7244} }