Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite

Adem Kocyigit, Noha Elhalawany, Ersin Bahceci, Brian Enders, Krithik Puthalath, Laila Abuhassan, Zain Yamani, Munir H Nayfeh

Research output: Contribution to journalArticle

Abstract

We use wet treatment to integrate red-luminescent Si nanoparticles with Mg-based wide-bandgap insulators Mg(OH) and MgO (5.7 and 7.3 eV respectively). In the process, Mg2+ is reduced on Si nanoparticle clusters, while suffering combustion in water, producing a spatially inhomogeneous Mg(OH)2/MgO-Si nanoparticle composite with an inner material predominantly made of Si, and a coating consisting predominantly of magnesium and oxygen ("core-shell" geometry). The nanocomposite exhibit luminescence covering nearly entire visible range. Results are consistent with formation of Mg(OH)2/MgO phase with direct 3.43-eV bandgap matching that of Si, with in-gap blue-green emitting states of charged Mg and O vacancies. Bandgap match with nanocomposite architecture affords strong enough coupling for the materials to nearly act as a single hybrid material with novel luminescence for photonic and photovoltaic applications.

Original languageEnglish (US)
Article number055324
JournalAIP Advances
Volume8
Issue number5
DOIs
StatePublished - May 1 2018

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nanocomposites
luminescence
broadband
nanoparticles
geometry
magnesium
coverings
insulators
photonics
coatings
composite materials
oxygen
water

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kocyigit, A., Elhalawany, N., Bahceci, E., Enders, B., Puthalath, K., Abuhassan, L., ... Nayfeh, M. H. (2018). Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite. AIP Advances, 8(5), [055324]. https://doi.org/10.1063/1.5019167

Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite. / Kocyigit, Adem; Elhalawany, Noha; Bahceci, Ersin; Enders, Brian; Puthalath, Krithik; Abuhassan, Laila; Yamani, Zain; Nayfeh, Munir H.

In: AIP Advances, Vol. 8, No. 5, 055324, 01.05.2018.

Research output: Contribution to journalArticle

Kocyigit, A, Elhalawany, N, Bahceci, E, Enders, B, Puthalath, K, Abuhassan, L, Yamani, Z & Nayfeh, MH 2018, 'Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite', AIP Advances, vol. 8, no. 5, 055324. https://doi.org/10.1063/1.5019167
Kocyigit A, Elhalawany N, Bahceci E, Enders B, Puthalath K, Abuhassan L et al. Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite. AIP Advances. 2018 May 1;8(5). 055324. https://doi.org/10.1063/1.5019167
Kocyigit, Adem ; Elhalawany, Noha ; Bahceci, Ersin ; Enders, Brian ; Puthalath, Krithik ; Abuhassan, Laila ; Yamani, Zain ; Nayfeh, Munir H. / Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite. In: AIP Advances. 2018 ; Vol. 8, No. 5.
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