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Author Lee, Hyunbok ♦ Cho, Sang Wan ♦ Park, Sang Han ♦ Cho, Mann-Ho ♦ Yi, Yeonjin
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CHARGE DISTRIBUTION ♦ DENSITY FUNCTIONAL METHOD ♦ DIFFUSION BARRIERS ♦ DIPOLE MOMENTS ♦ ELECTRONIC STRUCTURE ♦ ELECTRONS ♦ GOLD ♦ OPTOELECTRONIC DEVICES ♦ PENTACENE ♦ REDUCTION ♦ SURFACES ♦ THIOLS ♦ ULTRAVIOLET RADIATION ♦ WORK FUNCTIONS ♦ X RADIATION ♦ X-RAY PHOTOELECTRON SPECTROSCOPY
Abstract Highlights: • The electronic structure of pentacene/C{sub 16}H{sub 33}SH/Au is investigated. • The work function of Au is significantly decreased with C{sub 16}H{sub 33}SH treatment. • The reduced work function is attributed to its permanent dipole moment. - Abstract: Organic and printed electronics technologies require electrodes with low work functions to facilitate the transport of electrons in and out of various optoelectronic devices. We show that the surface modifier of 1-hexadecanethiol reduces the work function of conductors using in situ ultraviolet photoemission spectroscopy, and we combine experimental and theoretical methods to investigate the origin of the work function changes. The interfacial electronic structures of pentacene/1-hexadecanethiol/Au were investigated via in situ ultraviolet photoemission spectroscopy and X-ray photoemission spectroscopy in order to understand the change in the carrier injection barrier and chemical reactions upon surface modification. Theoretical calculations using density functional theory were also performed to understand the charge distribution of 1-hexadecanethiol, which affects the reduction of the work function. The 1-hexadecanethiol surface modifier is processed in air from solution, providing an appealing alternative to chemically-reactive low-work-function metals.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2014-10-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 58


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