✦ LIBER ✦

Time Evolution of Photoluminescence Response from Porous Silicon in Hydrocarbon Gas Sensing

✍ Scribed by Dian, J. ;Holec, T. ;Jel�nek, I. ;Jind?ich, J. ;Valenta, J. ;Pelant, I.

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 76 KB
Volume: 182
Category: Article
ISSN: 0031-8965
DOI: 10.1002/1521-396x(200011)182:1<485::aid-pssa485>3.0.co;2-8

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✦ Synopsis

A photoluminescence (PL) response (S-band) of porous silicon to specific amounts of organic vapors of n-hexane, toluene and methanol in gas phase reveals the presence of two reversible processes: one relatively fast responsible for PL quenching and one relatively slow which is responsible for a remarkable PL enhancement. The fast PL quenching (with time constant of several seconds) can be utilized for sensing the studied organic vapors within a concentration range of about 1±500 ppm.