Electroabsorption spectroscopy of poly(m-phenylenevinylene-co-2,5-dioctoxy-p-phenylenevinylene) and related materials

Helen Mellor; Andreas Bleyer; Donal D. C. Bradley; Paul A. Lane; Simon J. Martin; Frank Rohlfing; Ali R. Tajbakhsh

doi:10.1117/12.279289

1 December 1997 Electroabsorption spectroscopy of poly(m-phenylenevinylene-co-2,5-dioctoxy-p- phenylenevinylene) and related materials

Helen Mellor, Andreas Bleyer, Donal D. C. Bradley, Paul A. Lane, Simon J. Martin, Frank Rohlfing, Ali R. Tajbakhsh

Author Affiliations +

Proceedings Volume 3145, Optical Probes of Conjugated Polymers; (1997) https://doi.org/10.1117/12.279289
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We report experimental studies of poly(m-phenylenevinylene- co-2,5-dioctoxy-p-phenylenevinylene) (PmPV-co-DOctOPV). Model oligomers based on this polymer have been synthesized and results on these materials are also presented. Electroabsorption measurements have been performed on spin coated films between 1.5 eV and 5 eV with electric fields of up to 200 KV/cm. Using Stark shift analysis the electroabsorption spectra are compared with the first derivative of the corresponding low temperature absorption spectra. We also investigate the effect of changes in chemical structure by studying the variation between the electroabsorption spectra of related materials. Samples of these polymers and oligomers that differ by the proportion of trans and cis vinylene bonds are also compared to see what effect the trans or cis bond has on the electronic structure. Increased cis content enhances emission efficiency but little alters the electroabsorption spectra. The results for the different materials are compared and several features occurring at the onset and at the minima of the electroabsorption spectra are considered. These features do not depend on the trans/cis ratio and we present evidence that suggests aggregation effects play an important role in these samples.

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Helen Mellor, Andreas Bleyer, Donal D. C. Bradley, Paul A. Lane, Simon J. Martin, Frank Rohlfing, and Ali R. Tajbakhsh "Electroabsorption spectroscopy of poly(m-phenylenevinylene-co-2,5-dioctoxy-p- phenylenevinylene) and related materials", Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); https://doi.org/10.1117/12.279289

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