Photogeneration of Confined Soliton Pairs (Bipolarons) in Polythiophene.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1985
- Accession Number
- ADA160157
Entities
People
- E. Ehrenfreund
- H. Schaffer
- Martin A. Nowak
- O. Brafman
- Z. Vardeny
Organizations
- University of California, Santa Barbara