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

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.

Automated summary

This study investigates the correlation between organic field-effect transistors (OFETs) and organic charge-modulated field-effect transistors (OCMFETs) to improve the understanding of driving mechanisms in OCMFETs and optimize their device performance. By introducing self-assembled monolayers with different functional groups on the gate dielectric surface, the impact of surface characteristics on the electrical behavior of both devices is explored. The dipole moment of the dielectric surface is identified as a critical control variable in the performance correlation between OFET and OCMFET devices.