Electronic properties of semiconducting poly(ferrocenylsilane) thin films with vapor-phase iodine diffusion doping

Citation
L. Bakueva et al., Electronic properties of semiconducting poly(ferrocenylsilane) thin films with vapor-phase iodine diffusion doping, J MAT S-M E, 12(1), 2001, pp. 21-25
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN journal
09574522 → ACNP
Volume
12
Issue
1
Year of publication
2001
Pages
21 - 25
Database
ISI
SICI code
0957-4522(200101)12:1<21:EPOSPT>2.0.ZU;2-4
Abstract
We report diffusion doping of the semiconducting polymer poly (ferrocenylsi lanes), or PFS. We have obtained a steady-state conductivity change of grea ter than eight orders of magnitude effected through iodine vapor doping of PFS. The sign of thermoelectric power measurements indicates p-type conduct ivity. The conductivity exhibits an activation energy of DeltaE = (0.45-0.6 5) eV for moderately-doped samples and DeltaE = (0.8-0.99) eV for heavily-d oped samples. We report sample photoconductivity, which we find to be princ ipally of bolometric origin. We also study the evolution of electrical prop erties over time: during several days after fabrication, the samples exhibi t an irreversible decrease in conductivity which may be attributable to par tial iodine desorption. After this aging process, especially noticeable in heavily doped material, the sample properties stabilize, suggesting promise in a range of prospective device applications. (C) 2001 Kluwer Academic Pu blishers.