PHOTOCONDUCTIVITY ASSOCIATED WITH DEEP LEVELS IN POLYCRYSTALLINE DIAMOND FILMS

Authors
GONON P DENEUVILLE A GHEERAERT E FONTAINE F
Citation
P. Gonon et al., PHOTOCONDUCTIVITY ASSOCIATED WITH DEEP LEVELS IN POLYCRYSTALLINE DIAMOND FILMS, Philosophical magazine letters, 72(4), 1995, pp. 257-261
Citations number
10
Categorie Soggetti
Physics, Condensed Matter
Journal title
Philosophical magazine letters → ACNP
ISSN journal
09500839
Volume
72
Issue
4
Year of publication
1995
Pages
257 - 261
Database
ISI
SICI code
0950-0839(1995)72:4<257:PAWDLI>2.0.ZU;2-#
Abstract
The spectral dependence of the photoconductivity in polycrystalline di amond films has been studied between 0.5 and 2.5 eV. Several structure s are observed (a threshold at 0.85 eV, peaks at 1.1 and 1.4 eV, a bro ad band at 1.9 eV and weak peak at 2.4 eV), indicative of the presence of deep levels in these films. The peak at 1.1 eV is ascribed to the photoionization of acceptor states located at about 1 eV above the val ence band with some evidence of electron-phonon interaction at the sit es.