Localisation of electrons in wire-like porous silicon

Tigelis, IG; Xanthakis, JP; Vomvoridis, JL

dc.contributor.author	Tigelis, IG	en
dc.contributor.author	Xanthakis, JP	en
dc.contributor.author	Vomvoridis, JL	en
dc.date.accessioned	2014-03-01T01:13:53Z
dc.date.available	2014-03-01T01:13:53Z
dc.date.issued	1998	en
dc.identifier.issn	0031-8965	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12761
dc.subject	Porous Silicon	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Boundary conditions	en
dc.subject.other	Electron transport properties	en
dc.subject.other	Energy gap	en
dc.subject.other	Luminescence of solids	en
dc.subject.other	Effective mass theory (EMT)	en
dc.subject.other	Electron localization	en
dc.subject.other	Porous silicon	en
dc.title	Localisation of electrons in wire-like porous silicon	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/(SICI)1521-396X(199801)165:1<125::AID-PSSA125>3.0.CO;2-9	en
heal.identifier.secondary	http://dx.doi.org/10.1002/(SICI)1521-396X(199801)165:1<125::AID-PSSA125>3.0.CO;2-9	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	We investigate the possible localisation of electrons in wire-like porous Si (H-passivated Si), which can come from the undulation of the wire diameter from 20 to 40 Angstrom over a length of 40 Angstrom. We use the Effective Mass Theory (EMT) and to simulate the "bumpy" wire we employ a supercell composed of concentric cylinders with random diameters and periodic boundary conditions at its ends. We find that the low-lying states are localised inside particular cylinders of the supercell whereas further up - typically a few tenths of eV higher - one finds states extending through the whole of the wire. Our results support the model of luminescence from bulk states irrespective of the character of the band gap and can explain the constancy of the mobility with temperature and also the smooth transition of the luminescence spectrum from wire-like to dot-like structures.	en
heal.publisher	WILEY-V C H VERLAG GMBH	en
heal.journalName	Physica Status Solidi (A) Applied Research	en
dc.identifier.doi	10.1002/(SICI)1521-396X(199801)165:1<125::AID-PSSA125>3.0.CO;2-9	en
dc.identifier.isi	ISI:000071976700019	en
dc.identifier.volume	165	en
dc.identifier.issue	1	en
dc.identifier.spage	125	en
dc.identifier.epage	129	en