Fabrication of CNT as transparent electrode of large-area electronic devices

As the need to develop high power conversion efficiency (PCE) and low cost photovoltaic (PV) cell, organic PV (OPV) has seen growing research interest in recent years. One of the most important components of the OPV is the transparent conductive electrode, necessary for light transmission into th...

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Main Author: Lim, Yu Han.
Other Authors: Wah Shih Fen
Format: Final Year Project
Language:English
Published: 2009
Subjects:
Online Access:http://hdl.handle.net/10356/15386
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-153862023-03-04T15:39:23Z Fabrication of CNT as transparent electrode of large-area electronic devices Lim, Yu Han. Wah Shih Fen School of Materials Science and Engineering Nanoscience and Nanotechnology Cluster Lydia Helena Wong DRNTU::Engineering::Materials::Energy materials DRNTU::Engineering::Materials::Organic/Polymer electronics As the need to develop high power conversion efficiency (PCE) and low cost photovoltaic (PV) cell, organic PV (OPV) has seen growing research interest in recent years. One of the most important components of the OPV is the transparent conductive electrode, necessary for light transmission into the absorber materials. The most commonly used transparent electrode to date, Indium tin oxide (ITO), may not be suitable for some OPV devices on flexible substrates. High conductivity at a relatively high transparency level offered by singlewalled carbon nanotubes (SWNT), coupled with its good resistance to creep, crack and strain, makes it a front-runner of ITO replacement for flexible OPV devices. This project aims to investigate the feasibility of using SWNT as a transparent electrode. This project was investigated based on 2 main parts, (1) CNT layer deposition and (2) OPV device fabrication. The effects of various parameters of 2 types of CNT deposition methods – transfer printing and spray coating were investigated. PV cells made of transfer printed SWNTglass and sprayed coated SWNT-glass were also compared. The results show that an optimum combination of sonication power and CNT concentration is required to obtain a low sheet resistance (Rs) of 300 -1 at 80% transparency, comparable to the best-reported condition in literature. Spraying was also found to be a better deposition method in terms of uniformity, Rs and roughness. An OPV device was successfully fabricated using spray-coated CNT electrode, although further optimization of device fabrication is necessary to improve the PCE. In conclusion, this study found that CNT is a feasible alternative for ITO when Rs and roughness are optimized to a lower value to maximize its performance in a PV cell. Bachelor of Engineering (Materials Engineering) 2009-04-28T02:38:51Z 2009-04-28T02:38:51Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/15386 en 54 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Energy materials
DRNTU::Engineering::Materials::Organic/Polymer electronics
spellingShingle DRNTU::Engineering::Materials::Energy materials
DRNTU::Engineering::Materials::Organic/Polymer electronics
Lim, Yu Han.
Fabrication of CNT as transparent electrode of large-area electronic devices
description As the need to develop high power conversion efficiency (PCE) and low cost photovoltaic (PV) cell, organic PV (OPV) has seen growing research interest in recent years. One of the most important components of the OPV is the transparent conductive electrode, necessary for light transmission into the absorber materials. The most commonly used transparent electrode to date, Indium tin oxide (ITO), may not be suitable for some OPV devices on flexible substrates. High conductivity at a relatively high transparency level offered by singlewalled carbon nanotubes (SWNT), coupled with its good resistance to creep, crack and strain, makes it a front-runner of ITO replacement for flexible OPV devices. This project aims to investigate the feasibility of using SWNT as a transparent electrode. This project was investigated based on 2 main parts, (1) CNT layer deposition and (2) OPV device fabrication. The effects of various parameters of 2 types of CNT deposition methods – transfer printing and spray coating were investigated. PV cells made of transfer printed SWNTglass and sprayed coated SWNT-glass were also compared. The results show that an optimum combination of sonication power and CNT concentration is required to obtain a low sheet resistance (Rs) of 300 -1 at 80% transparency, comparable to the best-reported condition in literature. Spraying was also found to be a better deposition method in terms of uniformity, Rs and roughness. An OPV device was successfully fabricated using spray-coated CNT electrode, although further optimization of device fabrication is necessary to improve the PCE. In conclusion, this study found that CNT is a feasible alternative for ITO when Rs and roughness are optimized to a lower value to maximize its performance in a PV cell.
author2 Wah Shih Fen
author_facet Wah Shih Fen
Lim, Yu Han.
format Final Year Project
author Lim, Yu Han.
author_sort Lim, Yu Han.
title Fabrication of CNT as transparent electrode of large-area electronic devices
title_short Fabrication of CNT as transparent electrode of large-area electronic devices
title_full Fabrication of CNT as transparent electrode of large-area electronic devices
title_fullStr Fabrication of CNT as transparent electrode of large-area electronic devices
title_full_unstemmed Fabrication of CNT as transparent electrode of large-area electronic devices
title_sort fabrication of cnt as transparent electrode of large-area electronic devices
publishDate 2009
url http://hdl.handle.net/10356/15386
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