123rd General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Material Chemists
Room No. Room 405+406
Time THU 10:36-10:48
Code MAT.O-9
Subject Physical-Organic Approach to Examine Structure-Rectification Relation through Investigation of Second-order Stark Effect
Authors Soo jin Cho, Gyu Don Kong, Sohyun Park, Hyo Jae Yoon*
Department of Chemistry, Korea University, Korea
Abstract In principal, molecules exposed to an external electric field undergo distortion of electron orbit called the Stark effect. Understanding how the electronic function of molecular-scale electronic devices is related to the Stark effect is important. This presentation shows physical-organic studies to examine structure-property relationships in molecular-scale electronic devices. In particular, we focus on charge tunneling behaviors of large-area junctions formed with self-assembled monolayers comprising polycyclic aromatic hydrocarbon (PAH)-terminated n-alkanethiolates. No significant permanent dipole in the molecules allows us to investigate how the second-order Stark effect affect the performance of the PAH-based molecular diode. We demonstrate that the supramolecular structural change in a monolayer of the PAH-based molecular diode significantly influences the performance of device. The relation between the tilt angle of the active PAH terminal group relative to the direction of external electric field and the degree of the Stark shift and diode efficiency is quantitatively established.
E-mail tsch516@naver.com