TY - JOUR
T1 - Structural switching of self-assembled monolayer by external electric field
AU - Fujii, Hiromasa
AU - Sasaki, Kaori
AU - Wakabayashi, Yusuke
AU - Tajiri, Hiroo
AU - Miwa, Kazumoto
AU - Ono, Shimpei
AU - Nouchi, Ryo
N1 - Funding Information:
This work was supported by Grants-In-Aid for Scientific Research (JSPS KAKENHI, Grant Nos. 26287080, 26105008). The synchrotron radiation experiments at the SPring-8 were performed with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2015A1167, 2014B1091, 2014B1091).
Publisher Copyright:
© 2018 The Japan Society of Vacuum and Surface Science.
PY - 2018/4/12
Y1 - 2018/4/12
N2 - Self-assembled monolayers (SAMs) are used for adjusting the work function of metal electrodes in organic devices. Since the energy level difference between the HOMO or LUMO and the work function affects the electron injection through the metal-organic interfaces, fine tuning of the work function is of importance. To control the work function from external environment, external large electric field on low-density SAMs is reported to be effective. In order to obtain a direct evidence for the structural switching of the SAM, X-ray reflectivity measurements were performed. The result shows that the molecular tilting of 10° is induced by the external voltage application.
AB - Self-assembled monolayers (SAMs) are used for adjusting the work function of metal electrodes in organic devices. Since the energy level difference between the HOMO or LUMO and the work function affects the electron injection through the metal-organic interfaces, fine tuning of the work function is of importance. To control the work function from external environment, external large electric field on low-density SAMs is reported to be effective. In order to obtain a direct evidence for the structural switching of the SAM, X-ray reflectivity measurements were performed. The result shows that the molecular tilting of 10° is induced by the external voltage application.
KW - Diffraction and reflection
KW - Ionic liquid
KW - Self assembled monolayer
KW - Solid-liquid interfaces
KW - X-ray scattering
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U2 - 10.1380/ejssnt.2018.76
DO - 10.1380/ejssnt.2018.76
M3 - Article
AN - SCOPUS:85045258731
SN - 1348-0391
VL - 16
SP - 76
EP - 78
JO - e-Journal of Surface Science and Nanotechnology
JF - e-Journal of Surface Science and Nanotechnology
ER -