Electron behavior and photoelectric gas-sensitive characters of nanocrystalline La1-xSrxFeO3

Authors
Li, KY Wu, FQ Wang, DJ Xie, TF Li, TJ
Citation
Ky. Li et al., Electron behavior and photoelectric gas-sensitive characters of nanocrystalline La1-xSrxFeO3, MATER CH PH, 71(1), 2001, pp. 34-39
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS CHEMISTRY AND PHYSICS
ISSN journal
02540584 → ACNP
Volume
71
Issue
1
Year of publication
2001
Pages
34 - 39
Database
ISI
SICI code
0254-0584(20010801)71:1<34:EBAPGC>2.0.ZU;2-3
Abstract
Electron transport types and photovoltage gas-sensitive characters of nano- La1-xSrxFeO3 were probed by the vacuum adsorptive surface photovoltage tech nique. The results show that the band distortion and the increased anion va cancy caused by doping with a little Sr2+ ions in the nanomaterial are of a dvantage to form new exciton levels and the localized photogenic free charg e carriers, to promote the separation of exciton pairs with increasing sens or gas pressure, and to increase quantum-optical efficiency as result of th e effect of surface and quantum confinement. (C) 2001 Elsevier Science B.V. All rights reserved.