Carrier density and quantum efficiency measurements in conjugated polymers: Ultrafast photoinduced IRAV absorption

Daniel Moses, Arthur Dogariu, Alan J. Heeger

Research output: Contribution to journalConference article

6 Scopus citations

Abstract

Ultrafast measurements of transient excited-state absorption in the spectral region spanning the infrared active vibrational active (IRAV) modes in the prototypical luminescent polymers, poly(phenylene vinylene), PPV, and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene-vinylene)], MEH-PPV, reveal charge carrier generation within 100 fs after photoexcitation. The relatively large photocarrier quantum efficiency in MEH-PPV, φ0≈0.1 in zero applied electric field, implies primary photogeneration of charge carriers. Comparison of the recombination dynamics in MEH-PPV and PPV indicates that the carrier recombination rate is sensitive to the strength of the inter-chain interaction.

Original languageEnglish (US)
Pages (from-to)68-71
Number of pages4
JournalThin Solid Films
Volume363
Issue number1
DOIs
StatePublished - Mar 1 2000
Externally publishedYes
EventThe Asia-Pacific Symposium on Organic Electroluminescent Materials and Devices - Hong Kong, Hong Kong
Duration: Jun 8 1999Jun 11 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Carrier density and quantum efficiency measurements in conjugated polymers: Ultrafast photoinduced IRAV absorption'. Together they form a unique fingerprint.

  • Cite this