Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.

To achieve high power conversion efficiency (PCE) in dye-sensitized solar cell (DSSC) under illumination, favorable catalytic electrochemical reactions need to occur at the photoelectrode (i.e. oxidation) and counter electrode (i.e. reduction) respectively, which in turn are propelled through effect...

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Main Author: Guai, Guan Hong.
Other Authors: Chen Peng
Format: Theses and Dissertations
Language:English
Published: 2013
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Online Access:http://hdl.handle.net/10356/51181
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-511812023-03-03T16:05:51Z Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell. Guai, Guan Hong. Chen Peng Li Changming School of Chemical and Biomedical Engineering GlobalFoundries Singapore Pte Ltd Centre for Advanced Bionanosystems DRNTU::Engineering To achieve high power conversion efficiency (PCE) in dye-sensitized solar cell (DSSC) under illumination, favorable catalytic electrochemical reactions need to occur at the photoelectrode (i.e. oxidation) and counter electrode (i.e. reduction) respectively, which in turn are propelled through effective charge transport/transfer in the device. Therefore, this PhD project focuses on the smart engineering of nanomaterials and structural modifications in nanoscales to improve the catalysis of DSSC electrodes for enhanced device performance and economic sustainability while exploring the charge transport/transfer mechanisms to gain fundamental knowledge. In this study, it is demonstrated that specific tailoring of a TiO2 compact layer enhances charge harvesting at the photoelectrode through better interfacial bonding and charge transportation. Furthermore, it is also revealed that only charge transport enhancers with semiconducting nature could result in a synergistic effect of fast electron shuttling across the photoelectrode while suppressing charge recombination for higher device PCE. In addition, the electrochemical activity of a DSSC counter electrode can also be improved by designing and fabricating nanomaterials with desirable charge transfer properties and large effective catalytic surface area, such as graphene-Pt and sulfur-doped nickel oxide. Doctor of Philosophy (SCBE) 2013-03-01T08:44:57Z 2013-03-01T08:44:57Z 2013 2013 Thesis http://hdl.handle.net/10356/51181 en 147 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
spellingShingle DRNTU::Engineering
Guai, Guan Hong.
Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.
description To achieve high power conversion efficiency (PCE) in dye-sensitized solar cell (DSSC) under illumination, favorable catalytic electrochemical reactions need to occur at the photoelectrode (i.e. oxidation) and counter electrode (i.e. reduction) respectively, which in turn are propelled through effective charge transport/transfer in the device. Therefore, this PhD project focuses on the smart engineering of nanomaterials and structural modifications in nanoscales to improve the catalysis of DSSC electrodes for enhanced device performance and economic sustainability while exploring the charge transport/transfer mechanisms to gain fundamental knowledge. In this study, it is demonstrated that specific tailoring of a TiO2 compact layer enhances charge harvesting at the photoelectrode through better interfacial bonding and charge transportation. Furthermore, it is also revealed that only charge transport enhancers with semiconducting nature could result in a synergistic effect of fast electron shuttling across the photoelectrode while suppressing charge recombination for higher device PCE. In addition, the electrochemical activity of a DSSC counter electrode can also be improved by designing and fabricating nanomaterials with desirable charge transfer properties and large effective catalytic surface area, such as graphene-Pt and sulfur-doped nickel oxide.
author2 Chen Peng
author_facet Chen Peng
Guai, Guan Hong.
format Theses and Dissertations
author Guai, Guan Hong.
author_sort Guai, Guan Hong.
title Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.
title_short Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.
title_full Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.
title_fullStr Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.
title_full_unstemmed Catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.
title_sort catalysis of electrodes in nanoscales for high performance dye-sensitized solar cell.
publishDate 2013
url http://hdl.handle.net/10356/51181
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