ELECTRON-ENERGY-LOSS INVESTIGATION OF THE ELECTRONIC-STRUCTURE OF A PPP-RELATED LADDER POLYMER

Authors
ROMBERG HA NUCKER N FINK J UNTERWEGER OF STAMPFL J LEISING G
Citation
Ha. Romberg et al., ELECTRON-ENERGY-LOSS INVESTIGATION OF THE ELECTRONIC-STRUCTURE OF A PPP-RELATED LADDER POLYMER, Synthetic metals, 69(1-3), 1995, pp. 437-438
Citations number
6
Categorie Soggetti
Physics, Condensed Matter","Metallurgy & Metallurigical Engineering
Journal title
Synthetic metals → ACNP
ISSN journal
03796779
Volume
69
Issue
1-3
Year of publication
1995
Pages
437 - 438
Database
ISI
SICI code
0379-6779(1995)69:1-3<437:EIOTEO>2.0.ZU;2-9
Abstract
The electronic structure of a ladder polymer of PPP has been investiga ted by high-energy electron energy-loss spectroscopy (EELS) in transmi ssion. The band gap of the undoped compound is about 0.4 eV smaller co mpared to PPP. Information on the character of the undoped LPPP as wel l as on bipolaron states formed upon K doping in the former band gap a re obtained from momentum dependent EELS investigations. The extension of the bipolaron is estimated to 20 +/- 4 Angstrom.