Flexible screen-printed organic electrochemical transistors

Since the invention of transistors in 1947, the speed of innovation for modern technology has been rapid. While silicon-based complementary metal-oxide semiconductor (CMOS) circuits are well known for enabling high-speed processing in chips, the rigid nature of silicon wafers limits the application...

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Main Author: Zhao, Huifeng
Other Authors: Leong Wei Lin
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/167476
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1674762023-07-07T19:37:52Z Flexible screen-printed organic electrochemical transistors Zhao, Huifeng Leong Wei Lin School of Electrical and Electronic Engineering wlleong@ntu.edu.sg Engineering::Electrical and electronic engineering::Nanoelectronics Since the invention of transistors in 1947, the speed of innovation for modern technology has been rapid. While silicon-based complementary metal-oxide semiconductor (CMOS) circuits are well known for enabling high-speed processing in chips, the rigid nature of silicon wafers limits the application of CMOS technology in other fields which require flexible materials. As such, organic electronic circuits based on organic electrochemical transistors (OECTs) have gained high attention in recent years due to their printability, flexibility, and low voltage operation. Owing to its ability to function at low voltages, OECTs are suitable for the bioelectronic fabrication since most of biological reaction or species are occurred in an electrolyte medium. Despite their remarkably high transconductance, OECTs rely heavily on structure and dimensions of printed electrodes. Amongst several types of fabrication techniques, screen-printing offers a good tradeoff between cost and effectiveness. However, screen-printing is not one-size-fits-all and requires fine-tuning for different types of pastes. This FYP project aims to optimise printing parameters for the 4 types of pastes used in creating an OECT, namely silver, carbon, semiconducting organic polymer and insulator. Printing parameters such as print pressure, print speed and print-modes were varied and pastes were printed individually on separate substrates first. The printed substrates were then analysed accordingly to determine the best combination of parameter. Lastly, the chosen parameters for each paste are used to print complete devices for electrical testing. Bachelor of Engineering (Electrical and Electronic Engineering) 2023-05-29T06:01:46Z 2023-05-29T06:01:46Z 2023 Final Year Project (FYP) Zhao, H. (2023). Flexible screen-printed organic electrochemical transistors. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/167476 https://hdl.handle.net/10356/167476 en A2168-221 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering::Nanoelectronics
spellingShingle Engineering::Electrical and electronic engineering::Nanoelectronics
Zhao, Huifeng
Flexible screen-printed organic electrochemical transistors
description Since the invention of transistors in 1947, the speed of innovation for modern technology has been rapid. While silicon-based complementary metal-oxide semiconductor (CMOS) circuits are well known for enabling high-speed processing in chips, the rigid nature of silicon wafers limits the application of CMOS technology in other fields which require flexible materials. As such, organic electronic circuits based on organic electrochemical transistors (OECTs) have gained high attention in recent years due to their printability, flexibility, and low voltage operation. Owing to its ability to function at low voltages, OECTs are suitable for the bioelectronic fabrication since most of biological reaction or species are occurred in an electrolyte medium. Despite their remarkably high transconductance, OECTs rely heavily on structure and dimensions of printed electrodes. Amongst several types of fabrication techniques, screen-printing offers a good tradeoff between cost and effectiveness. However, screen-printing is not one-size-fits-all and requires fine-tuning for different types of pastes. This FYP project aims to optimise printing parameters for the 4 types of pastes used in creating an OECT, namely silver, carbon, semiconducting organic polymer and insulator. Printing parameters such as print pressure, print speed and print-modes were varied and pastes were printed individually on separate substrates first. The printed substrates were then analysed accordingly to determine the best combination of parameter. Lastly, the chosen parameters for each paste are used to print complete devices for electrical testing.
author2 Leong Wei Lin
author_facet Leong Wei Lin
Zhao, Huifeng
format Final Year Project
author Zhao, Huifeng
author_sort Zhao, Huifeng
title Flexible screen-printed organic electrochemical transistors
title_short Flexible screen-printed organic electrochemical transistors
title_full Flexible screen-printed organic electrochemical transistors
title_fullStr Flexible screen-printed organic electrochemical transistors
title_full_unstemmed Flexible screen-printed organic electrochemical transistors
title_sort flexible screen-printed organic electrochemical transistors
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/167476
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