Low-Temperature Processed Ga-Doped ZnO Coatings from Colloidal Inks

Handle URI:
http://hdl.handle.net/10754/598742
Title:
Low-Temperature Processed Ga-Doped ZnO Coatings from Colloidal Inks
Authors:
Della Gaspera, Enrico; Bersani, Marco; Cittadini, Michela; Guglielmi, Massimo; Pagani, Diego; Noriega, Rodrigo; Mehra, Saahil; Salleo, Alberto; Martucci, Alessandro
Abstract:
We present a new colloidal synthesis of gallium-doped zinc oxide nanocrystals that are transparent in the visible and absorb in the near-infrared. Thermal decomposition of zinc stearate and gallium nitrate after hot injection of the precursors in a mixture of organic amines leads to nanocrystals with tunable properties according to gallium amount. Substitutional Ga3+ ions trigger a plasmonic resonance in the infrared region resulting from an increase in the free electrons concentration. These nanocrystals can be deposited by spin coating, drop casting, and spray coating resulting in homogeneous and high-quality thin films. The optical transmission of the Ga-ZnO nanoparticle assemblies in the visible is greater than 90%, and at the same time, the near-infrared absorption of the nanocrystals is maintained in the films as well. Several strategies to improve the films electrical and optical properties have been presented, such as UV treatments to remove the organic compounds responsible for the observed interparticle resistance and reducing atmosphere treatments on both colloidal solutions and thin films to increase the free carriers concentration, enhancing electrical conductivity and infrared absorption. The electrical resistance of the nanoparticle assemblies is about 30 kΩ/sq for the as-deposited, UV-exposed films, and it drops down to 300 Ω/sq after annealing in forming gas at 450 °C, comparable with state of the art tin-doped indium oxide coatings deposited from nanocrystal inks. © 2013 American Chemical Society.
Citation:
Della Gaspera E, Bersani M, Cittadini M, Guglielmi M, Pagani D, et al. (2013) Low-Temperature Processed Ga-Doped ZnO Coatings from Colloidal Inks. Journal of the American Chemical Society 135: 3439–3448. Available: http://dx.doi.org/10.1021/ja307960z.
Publisher:
American Chemical Society (ACS)
Journal:
Journal of the American Chemical Society
KAUST Grant Number:
KUS-C1-015-21
Issue Date:
6-Mar-2013
DOI:
10.1021/ja307960z
PubMed ID:
23394063
Type:
Article
ISSN:
0002-7863; 1520-5126
Sponsors:
This work was done in the framework of collaborative research activities of Technical Committee 16 (on Nanostructured Glasses), of the International Commission on Glass (ICG). S.M., R.N., and A.S. kindly acknowledge support from the Global Climate energy Project at Stanford University. Partial support by the Center for Advanced Molecular Photovoltaics (award no. KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST), is acknowledged as well. Diane Wu is acknowledged for TEM microscopy.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorDella Gaspera, Enricoen
dc.contributor.authorBersani, Marcoen
dc.contributor.authorCittadini, Michelaen
dc.contributor.authorGuglielmi, Massimoen
dc.contributor.authorPagani, Diegoen
dc.contributor.authorNoriega, Rodrigoen
dc.contributor.authorMehra, Saahilen
dc.contributor.authorSalleo, Albertoen
dc.contributor.authorMartucci, Alessandroen
dc.date.accessioned2016-02-25T13:40:18Zen
dc.date.available2016-02-25T13:40:18Zen
dc.date.issued2013-03-06en
dc.identifier.citationDella Gaspera E, Bersani M, Cittadini M, Guglielmi M, Pagani D, et al. (2013) Low-Temperature Processed Ga-Doped ZnO Coatings from Colloidal Inks. Journal of the American Chemical Society 135: 3439–3448. Available: http://dx.doi.org/10.1021/ja307960z.en
dc.identifier.issn0002-7863en
dc.identifier.issn1520-5126en
dc.identifier.pmid23394063en
dc.identifier.doi10.1021/ja307960zen
dc.identifier.urihttp://hdl.handle.net/10754/598742en
dc.description.abstractWe present a new colloidal synthesis of gallium-doped zinc oxide nanocrystals that are transparent in the visible and absorb in the near-infrared. Thermal decomposition of zinc stearate and gallium nitrate after hot injection of the precursors in a mixture of organic amines leads to nanocrystals with tunable properties according to gallium amount. Substitutional Ga3+ ions trigger a plasmonic resonance in the infrared region resulting from an increase in the free electrons concentration. These nanocrystals can be deposited by spin coating, drop casting, and spray coating resulting in homogeneous and high-quality thin films. The optical transmission of the Ga-ZnO nanoparticle assemblies in the visible is greater than 90%, and at the same time, the near-infrared absorption of the nanocrystals is maintained in the films as well. Several strategies to improve the films electrical and optical properties have been presented, such as UV treatments to remove the organic compounds responsible for the observed interparticle resistance and reducing atmosphere treatments on both colloidal solutions and thin films to increase the free carriers concentration, enhancing electrical conductivity and infrared absorption. The electrical resistance of the nanoparticle assemblies is about 30 kΩ/sq for the as-deposited, UV-exposed films, and it drops down to 300 Ω/sq after annealing in forming gas at 450 °C, comparable with state of the art tin-doped indium oxide coatings deposited from nanocrystal inks. © 2013 American Chemical Society.en
dc.description.sponsorshipThis work was done in the framework of collaborative research activities of Technical Committee 16 (on Nanostructured Glasses), of the International Commission on Glass (ICG). S.M., R.N., and A.S. kindly acknowledge support from the Global Climate energy Project at Stanford University. Partial support by the Center for Advanced Molecular Photovoltaics (award no. KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST), is acknowledged as well. Diane Wu is acknowledged for TEM microscopy.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleLow-Temperature Processed Ga-Doped ZnO Coatings from Colloidal Inksen
dc.typeArticleen
dc.identifier.journalJournal of the American Chemical Societyen
dc.contributor.institutionUniversita degli Studi di Padova, Padua, Italyen
dc.contributor.institutionIRCCS Istituto Oncologico Veneto, Padua, Italyen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
dc.contributor.institutionCommonwealth Scientific and Industrial Research Organization, Melbourne, Australiaen
kaust.grant.numberKUS-C1-015-21en
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)en

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