Cold field emission dominated photoconductivity in ordered three-dimensional assemblies of octapod-shaped CdSe/CdS nanocrystals

Handle URI:
http://hdl.handle.net/10754/562516
Title:
Cold field emission dominated photoconductivity in ordered three-dimensional assemblies of octapod-shaped CdSe/CdS nanocrystals
Authors:
Zhang, Yang; Miszta, Karol; Manna, Liberato; Di Fabrizio, Enzo M. ( 0000-0001-5886-4678 ) ; Krahne, Roman
Abstract:
Semiconductor nanocrystals, especially their ordered assemblies, are promising materials for various applications. In this paper, we investigate the photoconductive behavior of sub-micron size, ordered three-dimensional (3D) assemblies of octapod-shaped CdSe/CdS nanocrystals that are contacted by overlay electron-beam lithography. The regular structure of the assemblies leads to photocurrent-voltage curves that can be described by the cold field electron emission model. Mapping of the photoconductivity versus excitation wavelength and bias voltage allows the extraction of the band gap and identification of the photoactive region in the voltage and spectral domain. These results have important implications for the understanding of photoconductive transport in similar systems. © 2013 The Royal Society of Chemistry.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program
Publisher:
Royal Society of Chemistry
Journal:
Nanoscale
Issue Date:
2013
DOI:
10.1039/c3nr01588b
Type:
Article
ISSN:
20403364
Sponsors:
L.M. acknowledges financial support from European Union through the FP7 starting ERC grant NANO-ARCH (contract number 240111).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Yangen
dc.contributor.authorMiszta, Karolen
dc.contributor.authorManna, Liberatoen
dc.contributor.authorDi Fabrizio, Enzo M.en
dc.contributor.authorKrahne, Romanen
dc.date.accessioned2015-08-03T10:41:02Zen
dc.date.available2015-08-03T10:41:02Zen
dc.date.issued2013en
dc.identifier.issn20403364en
dc.identifier.doi10.1039/c3nr01588ben
dc.identifier.urihttp://hdl.handle.net/10754/562516en
dc.description.abstractSemiconductor nanocrystals, especially their ordered assemblies, are promising materials for various applications. In this paper, we investigate the photoconductive behavior of sub-micron size, ordered three-dimensional (3D) assemblies of octapod-shaped CdSe/CdS nanocrystals that are contacted by overlay electron-beam lithography. The regular structure of the assemblies leads to photocurrent-voltage curves that can be described by the cold field electron emission model. Mapping of the photoconductivity versus excitation wavelength and bias voltage allows the extraction of the band gap and identification of the photoactive region in the voltage and spectral domain. These results have important implications for the understanding of photoconductive transport in similar systems. © 2013 The Royal Society of Chemistry.en
dc.description.sponsorshipL.M. acknowledges financial support from European Union through the FP7 starting ERC grant NANO-ARCH (contract number 240111).en
dc.publisherRoyal Society of Chemistryen
dc.titleCold field emission dominated photoconductivity in ordered three-dimensional assemblies of octapod-shaped CdSe/CdS nanocrystalsen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalNanoscaleen
dc.contributor.institutionItalian Institute of Technology (IIT), Via Morego 30, 16163 Genoa, Italyen
dc.contributor.institutionBIONEM Lab, University of Magna Graecia, Campus Salvatore Venuta, Viale Europa, Germaneto-Catanzaro 88100, Italyen
kaust.authorDi Fabrizio, Enzo M.en
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