Accession Number:

ADA160157

Title:

Photogeneration of Confined Soliton Pairs (Bipolarons) in Polythiophene.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV SANTA BARBARA INST FOR POLYMERS AND ORGANIC SOLIDS

Report Date:

1985-10-01

Pagination or Media Count:

19.0

Abstract:

From photoinduced absorption and light induced electron spin resonance, we demonstrate that the dominant photocarriers generated in polythiophene with excitation above the energy gap E sub g are charged bipolarons spin zero. The observation of bipolarons B superscript 2 or - rather than polarons P superscript or - as the dominant photoexcitations demonstrates that the Coulomb contribution ot the bipolaron eneergy U sub B is sufficeitly small that P superscript or - P superscrit or - yields B superscript or -2. From the analysis of the spectra, we find U sub B E sub g yields 0.12. approx. Author

Subject Categories:

  • Electricity and Magnetism
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE