The 81st JSAP Autumn Meeting, 2020

Presentation information

Oral presentation

12 Organic Molecules and Bioelectronics » 12.2 Characterization and Materials Physics

[10a-Z25-1~9] 12.2 Characterization and Materials Physics

Thu. Sep 10, 2020 9:00 AM - 11:30 AM Z25

Yoichi Yamada(Univ. of Tsukuba), Masahiro Shibuta(大阪市大)

9:00 AM - 9:15 AM

[10a-Z25-1] Probing the electric-field behavior in DPh-BTBT OFETs by Sum-Frequency Generation imaging spectroscopy

Chiho Katagiri1, 〇Takayuki Miyamae1, Hao Li2, Fangyuan Yang2, Steven Baldelli2 (1.AIST, 2.Univ. Houston)

Keywords:organic field effect transistor, sum frequency generation spectroscopy

In order to clarify the molecular behavior of organic thin films and the distribution of the internal electric field in organic field-effect transistors (OFETs), we have attempted to observe the distribution of the electric field induced by the accumulated charges inside the OFETs during operation using a compressive sensing (CS) SFG imaging technique.
By applying a voltage to the gate electrode, increase in the SFG signal derived from the insulating monolayer at the edge of the source and drain electrodes was observed. This phenomena is due to a strong electric field is generated around the edge of the gold electrode when a gate voltage is applied, and it reaches the gate insulating layer.