Charge Carrier Doping As Mechanism of Self‐Assembled Monolayers Functionalized Electrodes in Organic Field Effect Transistors

• DOI: 10.1002/admi.202101377
• Publication Date: 2021-11-24T03:41:57Z
• Authors: Kalyani Patrikar; Urvashi Bothra; Valipe Ramgopal Rao; Dinesh Kabra
• Keywords: Pentacene; Organic field-effect transistor; Organic semiconductor; Self-assembled monolayer

Abstract Coating electrodes with self‐assembled monolayer (SAM) of polar molecules is known to reduce contact resistance ( R C ) in organic field effect transistors (OFETs). It shown that the behavior SAM OFETs can be explained by considering a mechanism interfacial doping semiconductor due charge transfer during interface formation. The enhancement analyzed performance pentacene Cu electrodes, coating pentafluorobenzenethiol or perfluorodecanethiol. found application either leads an increase work function surface. However, shift does not correlate trends and OFET drain current. Further, first principle calculations reveal notable difference delocalization frontal orbitals SAM, indicator ease across interface. Based on doping, physics model developed for estimating injection barrier, predicting consequent device characteristics. believed methodology this study utilized beyond system used here.