Time evolution of photoluminescence response from porous silicon in hydrocarbon gas sensing

Authors
Dian, J Holec, T Jelinek, I Jindrich, J Valenta, J Pelant, I
Citation
J. Dian et al., Time evolution of photoluminescence response from porous silicon in hydrocarbon gas sensing, PHYS ST S-A, 182(1), 2000, pp. 485-488
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
ISSN journal
00318965 → ACNP
Volume
182
Issue
1
Year of publication
2000
Pages
485 - 488
Database
ISI
SICI code
0031-8965(200011)182:1<485:TEOPRF>2.0.ZU;2-L
Abstract
A photoluminescence (PL) response (S-band) of porous silicon to specific am ounts of organic vapors of n-hexane, toluene and methanol in gas phase reve als the presence of two reversible processes: one relatively fast responsib le for. PL quenching and one relatively slow which is responsible for a rem arkable PL enhancement. The last PL quenching (with time constant of severa l seconds) can be utilized for sensing the studied organic vapors within a concentration range of about 1-500 ppm.