VOLTAGE-CONTROLLED SPECTRAL SHIFT OF POROUS SILICON ELECTROLUMINESCENCE

Citation
A. Bsiesy et al., VOLTAGE-CONTROLLED SPECTRAL SHIFT OF POROUS SILICON ELECTROLUMINESCENCE, Physical review letters, 71(4), 1993, pp. 637-640
Citations number
15
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
71
Issue
4
Year of publication
1993
Pages
637 - 640
Database
ISI
SICI code
0031-9007(1993)71:4<637:VSSOPS>2.0.ZU;2-E
Abstract
In this paper, it is reported that the electroluminescence (EL) of por ous silicon shows a reversible spectral shift as large as 270 nm for a n external bias variation of 0.6 V. This electroluminescence is obtain ed upon cathodic polarization of lightly doped n-type porous silicon i n contact with aqueous persulphate solutions. The study of the EL beha vior as a function of the external voltage and the persulphate ion con centration proves that while the amplitude of the EL is proportional t o the intensity of the exchanged current, the spectral position is onl y determined by the applied voltage.