Charge Transport in Field-Effect and Ion-Gel Gated Conjugated Polymers
type: CreativeWork
description: Organic field effect transistors (OFETs) have recently made remarkable advancements, which have mostly been driven by the design, characterisation, and comprehension of new conjugated polymers. Significant effects can arise from making minor alterations to the monomers and building blocks, which impacts charge transport; however, some of mechanisms responsible for the effects have yet to be fully understood. There have been simultaneous interests in devising various arrangements of co-monomeric donor−acceptor (DA) copolymers. To create the next generation of high-performance organic semiconductors, it is essential that the relationship between structures and properties of conjugated systems are fully understood. To investigate diverse, customised conjugated polymers with a low degree of disorder, 15 derivatives of the benchmark low disorder polymer semiconductor IDT-BT were synthesised. To create the derivatives, a number of modifications were made to the acceptor unit, donor unit, molecular weight or side chains. The modifications resulted in two polymers, IDT-BS and TIF-BT, which when properly optimised, have the potential to perform better than IDT-BT. Thus, these novel polymers are suitable for use in flexible electronic devices. Moreover, the properties of semiconducting organic materials can be altered by chalcogen substitution. In this thesis, we not only explore the effects of chalcogens on the field-effect charge transport properties of such materials but also examine the effect of chalcogens upon doping. It is considered that interchain interactions are enhanced by introducing a single chalcogen atom into the backbone of the polymer. As a result, the doped samples adopt better electrical properties. In our opinion, the enhanced properties are the product of the heteroatom stimulating the formation of unique microstructures. We also investigate the impact on conductivity caused by three different doping methods (molecular doping/ ion exchange doping and ele…
abstract: Organic field effect transistors (OFETs) have recently made remarkable advancements, which have mostly been driven by the design, characterisation, and comprehension of new conjugated polymers. Significant effects can arise from making minor alterations to the monomers and building blocks, which impacts charge transport; however, some of mechanisms responsible for the effects have yet to be fully understood. There have been simultaneous interests in devising various arrangements of co-monomeric donor−acceptor (DA) copolymers. To create the next generation of high-performance organic semiconductors, it is essential that the relationship between structures and properties of conjugated systems are fully understood. To investigate diverse, customised conjugated polymers with a low degree of disorder, 15 derivatives of the benchmark low disorder polymer semiconductor IDT-BT were synthesised. To create the derivatives, a number of modifications were made to the acceptor unit, donor unit, molecular weight or side chains. The modifications resulted in two polymers, IDT-BS and TIF-BT, which when properly optimised, have the potential to perform better than IDT-BT. Thus, these novel polymers are suitable for use in flexible electronic devices. Moreover, the properties of semiconducting organic materials can be altered by chalcogen substitution. In this thesis, we not only explore the effects of chalcogens on the field-effect charge transport properties of such materials but also examine the effect of chalcogens upon doping. It is considered that interchain interactions are enhanced by introducing a single chalcogen atom into the backbone of the polymer. As a result, the doped samples adopt better electrical properties. In our opinion, the enhanced properties are the product of the heteroatom stimulating the formation of unique microstructures. We also investigate the impact on conductivity caused by three different doping methods (molecular doping/ ion exchange doping and ele…
author: Zhang, Lu
language: eng
keywords: Organic Field Effect Transistor, Conjugated Polymer
license: https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/78c3a84b-855d-4f71-b075-99e4af8543fa/download
license: https://www.rioxx.net/licenses/all-rights-reserved/
date published: 2023-01-31
date modified: 2026-07-22T22:24:08Z
provider: Cambridge University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Cambridge

PropertyValue
property ID: DOI
value: 10.17863/CAM.97175