122nd General Meeting of the KCS

Type Oral Presentation
Area Oral Presentations for Young Scholars in Organic Division
Room No. Room 325A+B
Time THU 10:15-:
Code ORGN.O-6
Subject Molecularly Controlled Stark Effect Induces Significant Rectification in Polycyclic Aromatic Hydrocarbon-terminated n-Alkanethiolates
Authors Soojin Cho, Gyu Don Kong, Sohyun Park, Seo Eun Byeon, Hyo Jae Yoon*
Department of Chemistry, Korea University, Korea
Abstract Understanding the structure-electric field relationship is a significant challenge in molecular and organic electronics. In this presentation, we will show that reliable and reproducible molecular diode can be achieved through the control of conjugation length in polycyclic aromatic hydrocarbon-terminated n-alkanethiolate (denoted as SC11PAH), incorporated into liquid metal-based large-area tunnel junctions in the form of self-assembled monolayer. By taking advantage of structural simplicity and tunability of SC11PAH and high-yielding feature of the junction technique, we demonstrate the increase in conjugation length of the PAH terminal group leads to significant rectification ratio up to ~1.7 × 102 at ±740 mV. Further study suggests that the Stark shift of molecular energy resonance of PAH breaks the symmetry of energy topography across the junction and induces rectification in a temperature-independent charge transport regime.
E-mail tsch516@naver.com