Presentation Information
[TuP3H-06]Control of Surface Properties of Indium-Tin-Oxide Using Phosphonic Acid Monolayers
〇Mitsuki Okamoto1, Shoutarou Fujiki1, Yih-Ren Chang1, Yoshiaki Hattori1, Masatoshi Kiitamura1 (1. Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University (Japan))
Indium tin oxide (ITO) has been widely used in liquid crystal displays, organic light-emitting diodes (OLEDs), and perovskite solar cells as a transparent electrode. In applications to OLEDs and perovskite solar cells, device performance can be improved by forming monolayers on ITO. Phosphonic acids are used for the formation of monolayers on ITO surfaces. In this study, we investigated the surface properties of ITO modified with monolayers formed using three types of phosphonic acids, with the aim of controlling the work function and wettability related to surface energy. The contact angles depended on the type of phosphonic acid and were 43.2 degree for HBPA, 74.0 degree for PFBPA, and 104.0 degree for ODPA. On the other hand, the work function ranged from 5.07
to 5.28 eV. A notable result is that while HBPA and ODPA exhibited nearly the same work function of approximately 5.1 eV, their contact angles differed significantly.
to 5.28 eV. A notable result is that while HBPA and ODPA exhibited nearly the same work function of approximately 5.1 eV, their contact angles differed significantly.
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