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The Swiss‐Army‐Knife Self‐Assembled Monolayer: Improving Electron Injection, Stability, and Wettability of Metal Electrodes with a One‐Minute Process
Author(s) -
Alt Milan,
Jesper Malte,
Schinke Janusz,
Hillebrandt Sabina,
Reiser Patrick,
Rödlmeier Tobias,
Angelova Iva,
Deing Kaja,
Glaser Tobias,
Mankel Eric,
Jaegermann Wolfram,
Pucci Annemarie,
Lemmer Uli,
Bunz U. H. F.,
Kowalsky W.,
HernandezSosa G.,
Lovrincic R.,
Hamburger M.
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201505386
Subject(s) - materials science , monolayer , wetting , electrode , polyethylene terephthalate , self assembled monolayer , contact angle , work function , organic field effect transistor , x ray photoelectron spectroscopy , chemical engineering , transistor , nanotechnology , layer (electronics) , optoelectronics , field effect transistor , composite material , engineering , voltage , quantum mechanics , chemistry , physics
A novel Self‐assembled Monolayer (SAM) forming molecule bisjulolidyldisulfide (9,9'‐disulfanediylbis(2,3,6,7‐tetrahydro‐1H,5H‐pyrido[3,2,1‐ij]quinoline)) is demonstrated which lowers the work function of metal surfaces by ≈1.2 eV and can be deposited in a 1 min process. Bisjulolidyldisulfide exists in a stable disulfide configuration prior to surface exposure and can therefore be stored, handled, and processed in ambient conditions. SAM from bisjulolidyldisulfide are deposited on metal surfaces (Au and Ag), including inkjet printed Ag on polyethylene terephthalate substrates, investigated by photoelectron and infrared spectroscopy, and used as electrodes in n‐type organic field effect transistor (OFET). Treatment of electrodes in OFET devices with with bisjulolidyldisulfide‐SAMs reduces the contact resistance by two orders of magnitude and improves shelf life with respect to pristine metal electrodes. The presented treatment also increases the surfaces wettability and thereby facilitates solution processing of a subsequent layer. These beneficial properties for device performance, processing, and stability, combined with ease of preparation and handling, render this SAM‐forming molecule an excellent candidate for the high‐throughput production of flexible electronic devices.