Issue 27, 2023

Boundary research between organic conductors and transistors: new trends for functional molecular crystals

Abstract

In organic transistors, the contact resistance at the interface between the organic semiconductor (OSC) and electrode reduces the device performance. To solve this problem, a buffer layer is inserted between the electrode and OSC layer to decrease the depletion layer that forms at the OSC surface. Especially in bottom-contact transistors, the effects of interfacial potentials and carrier traps can be suppressed using high-conductivity organic-conductors and carbon pastes as electrodes. Accordingly, a “self-contact” transistor was proposed based on chemically doping OSCs. This technique enables us to fabricate organic conductor electrodes specific to each OSC, resulting in transistors with low contact resistance. However, organic conductors based on OSCs are essential to expand the fabrication of these devices using the doping method. Consequently, OSCs have been used to develop a promising new class of organic conductors with high conductivity and excellent thermoelectric properties. Although developing organic conductors based on OSCs remains relatively unexplored, it is expected to become a new trend in functional molecular compounds.

Graphical abstract: Boundary research between organic conductors and transistors: new trends for functional molecular crystals

Article information

Article type
Highlight
Submitted
30 Mar 2023
Accepted
01 Jun 2023
First published
02 Jun 2023
This article is Open Access
Creative Commons BY-NC license

CrystEngComm, 2023,25, 3846-3860

Boundary research between organic conductors and transistors: new trends for functional molecular crystals

T. Kadoya and T. Higashino, CrystEngComm, 2023, 25, 3846 DOI: 10.1039/D3CE00305A

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