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

被引：1

作者：

ROMBERG, HA

NUCKER, N

FINK, J

UNTERWEGER, OF

STAMPFL, J

LEISING, G

机构：

[1] IFW DRESDEN EV, INST FESTKORPERFORSCH, D-01171 DRESDEN, GERMANY

[2] GRAZ TECH UNIV, INST FESTKORPERPHYS, A-8010 GRAZ, AUSTRIA

来源：

SYNTHETIC METALS | 1995年 / 69卷 / 1-3期

关键词：

Doping (additives) - Electron energy levels - Electron energy loss spectroscopy - Electronic structure - Electrons - Energy gap - Light emitting diodes - Molecules - Optical variables measurement - Thin films;

D O I：

10.1016/0379-6779(94)02519-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic structure of a ladder polymer of PPP has been investigated by high-energy electron energy-loss spectroscopy (EELS) in transmission. The band gap of the undoped compound is about 0.4 eV smaller compared to PPP. Information on the character of the undoped LPPP as well as on bipolaron states formed upon K doping in the former band gap are obtained from momentum dependent EELS investigations. The extension of the bipolaron is estimated to 20 +/- 4 Angstrom.

引用

页码：437 / 438

页数：2

共 6 条

[1] ASF5-DOPED POLYPARAPHENYLENE - EVIDENCE FOR POLARON AND BIPOLARON FORMATION [J].