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Oxygen-controlled photoconductivity in ZnO nanowires functionalized with colloidal CdSe quantum dots
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik, Halvledarmaterial, HMA.
Vise andre og tillknytning
2012 (engelsk)Inngår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 116, nr 36, s. 19604-19610Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

ZnO nanowire arrays were functionalized with colloidal CdSe quantum dots stabilized by 3-mercaptopropionic acid to form hybrid devices. The photoconductivity of the nanowire/quantum-dot devices was studied under selective photoexcitation of the quantum dots, and it was found that the dynamics strongly depend on the gas environment. Desorption of surface oxygen from both the ZnO nanowires and the CdSe quantum dots, activated by electron tunnelling between the nanowires and the quantum dots, is found to be the dominating process that determines the dynamics of the photoconductivity in the hybrid nanowire/quantum-dot devices.

sted, utgiver, år, opplag, sider
2012. Vol. 116, nr 36, s. 19604-19610
Emneord [en]
Cadmium alloys, Cadmium compounds, Desorption, Dynamics, Nanowires, Oxygen, Photoconductivity, Photoexcitation, Zinc oxide
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-103642DOI: 10.1021/jp307235uISI: 000308631300068Scopus ID: 2-s2.0-84866380711OAI: oai:DiVA.org:kth-103642DiVA, id: diva2:561323
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QC 20121018

Tilgjengelig fra: 2012-10-18 Laget: 2012-10-17 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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