Direct optical determination of interfacial transport barriers in molecular tunnel junctions

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DOIResolve DOI: http://doi.org/10.1021/ja403123a
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TypeArticle
Journal titleJournal of the American Chemical Society
ISSN0002-7863
Volume135
Issue26
Pages95849587; # of pages: 4
SubjectDirect measurement; Energy thresholds; Interfacial transport; Internal photoemission; Molecular absorption; Optical determination; Organic components; Photocurrent spectrum; Synthesis (chemical); Chemistry; absorption; article; chemical structure; electron; energy; molecular electronics; molecule; temperature dependence; X ray photoelectron spectroscopy
AbstractMolecular electronics seeks to build circuitry using organic components with at least one dimension in the nanoscale domain. Progress in the field has been inhibited by the difficulty in determining the energy levels of molecules after being perturbed by interactions with the conducting contacts. We measured the photocurrent spectra for large-area aliphatic and aromatic molecular tunnel junctions with partially transparent copper top contacts. Where no molecular absorption takes place, the photocurrent is dominated by internal photoemission, which exhibits energy thresholds corresponding to interfacial transport barriers, enabling their direct measurement in a functioning junction. © 2013 American Chemical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology (NINT-INNT)
Peer reviewedYes
NPARC number21269723
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Record identifierb8f5574c-4d3b-46c0-9cfb-c29cb8415501
Record created2013-12-13
Record modified2016-05-09
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