Size controlled synthesis of germanium nanocrystals: effect of Ge precursor and hydride reducing agent

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dc.contributor.authorCarolan, Darragh
dc.contributor.authorDoyle, Hugh
dc.contributor.funderHigher Education Authorityen
dc.date.accessioned2016-04-15T10:32:01Z
dc.date.available2016-04-15T10:32:01Z
dc.date.issued2015-05-02
dc.description.abstractGermanium nanocrystals (Ge NCs) have attracted increasing attention as a promising alternative to II-VI and IV-VI semiconductor materials as they are cheap, “green,” electrochemically stable, and compatible with existing CMOS processing methods. Germanium is a particularly attractive material for optoelectronic applications as it combines a narrow band gap with high carrier mobilities and a large exciton Bohr radius. Solution-phase synthesis and characterisation of size monodisperse alkyl-terminated Ge NCs are demonstrated. Ge NCs were synthesised under inert atmospheric conditions via the reduction of Ge halide salts (GeX4) by hydride reducing agents within inverse micelles. Regulation of NC size is achieved by variation of germanium precursor and the strength of hydride reducing agents used. UV-Visible absorbance and photoluminescence spectroscopy showed strong significant quantum confinement effects, with moderate absorption in the UV spectral range, and strong emission in the violet with a marked dependence on excitation wavelength.en
dc.description.sponsorshipHigher Education Authority (PRTLI programs Cycle 3 “Nanoscience” and Cycle 4 “INSPIRE”)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCAROLAN, D. & DOYLE, H. 2015. Size controlled synthesis of germanium nanocrystals: effect of Ge precursor and hydride reducing agent. Journal of Nanomaterials, 2015. doi:10.1155/2015/506056en
dc.identifier.doi10.1155/2015/506056
dc.identifier.endpage9en
dc.identifier.journaltitleJournal of Nanomaterialsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/2454
dc.language.isoenen
dc.publisherHindawi Publishing Corporationen
dc.relation.urihttp://www.hindawi.com/journals/jnm/2015/506056/
dc.rightsCopyright © 2015 Darragh Carolan and Hugh Doyle. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.subjectEnergy gapen
dc.subjectGermaniumen
dc.subjectHydridesen
dc.subjectPhotoluminescence spectroscopyen
dc.subjectSemiconductor materialsen
dc.subjectSynthesisen
dc.subjectAtmospheric conditionsen
dc.subjectExcitation wavelengthen
dc.subjectGermanium nanocrystalsen
dc.subjectHigh carrier mobilityen
dc.subjectOptoelectronic applicationsen
dc.subjectQuantum confinement effectsen
dc.subjectSize controlled synthesisen
dc.subjectSolution phase synthesisen
dc.titleSize controlled synthesis of germanium nanocrystals: effect of Ge precursor and hydride reducing agenten
dc.typeArticle (peer-reviewed)en
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