Electron Interaction and Optical Gap of Conjugated Polymers.
Abstract
The controversy over whether the optical gap of a polymer is increased or decreased by the electron-electron interaction can be clarified by studying the effect of the screened Coulomb interaction on the correlation function of the excited states. Since the competition between the diagonal and off-diagonal parts of the electron interaction depends on the screening, the screening becomes the decisive factor in determining the dependence of the optical gap of the electron interaction. Our theory shows that the electron interaction with weak or usual screening increases the optical gap, but if the screening is very strong, the optical gap can be reduced by the electron interaction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1991
- Accession Number
- ADA240876
Entities
People
- Dong Lin
- K. Nasu
- Thomas F. George
- Xicheng Sun
- Z. Shuai
Organizations
- Washington State University