Dissecting the Interplay between Organic Charge-Modulated Field-Effect Transistors and Field-Effect Transistors through Interface Control Engineering

Taehoon Hwang; Eunyoung Park; Jungyoon Seo; Dashdendev Tsogbayar; Eun Ko; Chanwoo Yang; Hyungju Ahn; Dong Yun Lee; Hwa Sung Lee

doi:10.1021/acsami.3c12105

Dissecting the Interplay between Organic Charge-Modulated Field-Effect Transistors and Field-Effect Transistors through Interface Control Engineering

ACS Appl Mater Interfaces. 2023 Nov 22;15(46):53765-53775. doi: 10.1021/acsami.3c12105. Epub 2023 Nov 9.

Authors

Taehoon Hwang^{1

2}, Eunyoung Park¹, Jungyoon Seo^{1

2}, Dashdendev Tsogbayar^{1

2}, Eun Ko¹, Chanwoo Yang³, Hyungju Ahn⁴, Dong Yun Lee⁵, Hwa Sung Lee^{1

2}

Affiliations

¹ Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea.
² BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan 15588, Republic of Korea.
³ Advanced Nano-Surface and Wearable Electronics Research Laboratory, Heat and Surface Technology R&D Department, Korea Institute of Industrial Technology, Incheon 21999, Korea.
⁴ Pohang Accelerator Laboratory, Gyeongbuk, Pohang 37673, Republic of Korea.
⁵ Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

PMID: 37944051
DOI: 10.1021/acsami.3c12105

Abstract

Organic charge-modulated field-effect transistors (OCMFETs) have garnered significant interest as sensing platforms for diverse applications that include biomaterials and chemical sensors owing to their distinct operational principles. This study aims to improve the understanding of driving mechanisms in OCMFETs and optimize their device performance by investigating the correlation between organic field-effect transistors (OFETs) and OCMFETs. By introducing self-assembled monolayers (SAMs) with different functional groups on the AlO_x gate dielectric surface, we explored the impact of the surface characteristics on the electrical behavior of both devices. Our results indicate that the dipole moment of the dielectric surface is a critical control variable in the performance correlation between OFET and OCMFET devices, as it directly impacts the generation of the induced floating gate voltage through the control gate voltage. The insights obtained from this study contribute to the understanding of the factors affecting OCMFET performance and emphasize their potential as platforms for diverse sensing systems.

Keywords: dipole moment; interfacial engineering; organic charge-modulated field-effect transistors; organic field-effect transistor; sensing platform.