Work function increase of transparent conductive electrodes by solution processed electron acceptor molecular monolayers

Work function increase of transparent conductive electrodes by solution processed electron acceptor molecular monolayers

We show how the work function of transparent conductive oxide surfaces can be increased by more than 1 eV by solution-depositing strong electron acceptor monolayers comprising tetrafluoro-tetracyanoquinodimethane (F4TCNQ) or hexaazatriphenylene-hexacarbonitrile (HATCN). The effects of ambient atmosp...

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Veröffentlicht in:Applied physics. A, Materials science & processing Materials science & processing, 2014-02, Vol.114 (2), p.291-295
Hauptverfasser: Castellani, Mauro, Winkler, Stefanie, Bröker, Benjamin, Baumgarten, Martin, Müllen, Klaus, Koch, Norbert
Format: Artikel
Sprache:eng
Schlagworte:
Characterization and Evaluation of Materials
Condensed Matter Physics
Electrodes
Machines
Manufacturing
Materials science
Moisture
Monolayers
Nanotechnology
Optical and Electronic Materials
Oxides
Photoelectron spectroscopy
Physics
Physics and Astronomy
Processes
Rapid Communication
Surfaces and Interfaces
Thin Films
Ultrahigh vacuum
Work functions
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Beschreibung
Zusammenfassung:We show how the work function of transparent conductive oxide surfaces can be increased by more than 1 eV by solution-depositing strong electron acceptor monolayers comprising tetrafluoro-tetracyanoquinodimethane (F4TCNQ) or hexaazatriphenylene-hexacarbonitrile (HATCN). The effects of ambient atmosphere on the work function are investigated by comparing Kelvin probe measurements in air and ultraviolet photoelectron spectroscopy in ultrahigh vacuum. In this way, important technological issues related to the influence of ambient moisture on electrode properties are elucidated.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-013-8048-x