Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination

碩士 === 國立雲林科技大學 === 電子工程系 === 106 === In this study, phosphorene was mixed with titanium dioxide (TiO2) colloid and deposited on fluorine-doped tin oxide (FTO) conductive substrate by doctor blade method as the photoelectrode of dye-sensitized solar cell (DSSC). The reason is because phosphorene has...

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Main Authors: CHUANG, YI-HSUAN, 莊易軒
Other Authors: LAI, CHIH-HSIEN
Format: Others
Language:en_US
Published: 2018
Online Access:http://ndltd.ncl.edu.tw/handle/9ask5v
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record_format oai_dc
spelling ndltd-TW-105YUNT03930662019-05-16T00:44:54Z http://ndltd.ncl.edu.tw/handle/9ask5v Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination 研製以黑磷烯修飾二氧化鈦光電極與銀修飾鉑對電極於低照度之染料敏化太陽能電池 CHUANG, YI-HSUAN 莊易軒 碩士 國立雲林科技大學 電子工程系 106 In this study, phosphorene was mixed with titanium dioxide (TiO2) colloid and deposited on fluorine-doped tin oxide (FTO) conductive substrate by doctor blade method as the photoelectrode of dye-sensitized solar cell (DSSC). The reason is because phosphorene has high electron mobility and high absorption, which could enhance the electron transfer ability and increase the recombination resistance, thus improve the current density. The surface morphology of phosphorene film was characterized by field-emission scanning electronic microscopy (FE-SEM). The optical absorption of phosphorene-TiO2 composited film was measured by UV–visible spectrometer. The interface resistance of DSSC was measured by electrochemical impedance spectroscopy. Compared with the photovoltaic conversion efficiency of 3.50% based on pure TiO2 photoelectrode, it is found that the optimal photovoltaic conversion efficiency of 4.35% is achieved when the phosphorene is introduced to TiO2 photoelectrode, and the efficiency increases by 24%. More than that, silver (Ag) was deposited by radio frequency sputtering to modify the conventional platinum (Pt) counter electrode to enhance the redox reaction between electrolyte and dye molecule. The reason is because Ag has the highest electrical conductivity in metal, and the lattice strain effect will increase the surface absorption ability of film. The silver modified Pt counter electrode with different Ag thicknesses was investigated for electrical conductivity and catalytic activity. The surface morphology of Pt/Ag counter electrode was characterized by FE-SEM. The sheet resistance of Pt/Ag counter electrode was measured by 4-point probing system. The interface resistance of DSSC was measured by electrochemical impedance spectroscopy. Compared with the pure Pt counter electrode, the silver modified Pt counter electrode can provide a higher electrical conductivity and a superior catalytic activity. Moreover, the photovoltaic conversion efficiency of DSSC can be enhanced from 3.82% with the Pt counter electrode to 4.46% with the Pt/Ag counter electrode, and the efficiency increases by 16%. Finally, the DSSC of optimal composited films with phosphorene-TiO2 photoelectrode and Pt/Ag counter electrode was investigated under low illumination. The photovoltaic conversion efficiency of the DSSC can be enhanced from 4.76% under illumination of 100 mW/cm2 to 7.21% under illumination of 1.75 mW/cm2 and the efficiency increases by 52%. LAI, CHIH-HSIEN 賴志賢 2018 學位論文 ; thesis 118 en_US
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language en_US
format Others
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description 碩士 === 國立雲林科技大學 === 電子工程系 === 106 === In this study, phosphorene was mixed with titanium dioxide (TiO2) colloid and deposited on fluorine-doped tin oxide (FTO) conductive substrate by doctor blade method as the photoelectrode of dye-sensitized solar cell (DSSC). The reason is because phosphorene has high electron mobility and high absorption, which could enhance the electron transfer ability and increase the recombination resistance, thus improve the current density. The surface morphology of phosphorene film was characterized by field-emission scanning electronic microscopy (FE-SEM). The optical absorption of phosphorene-TiO2 composited film was measured by UV–visible spectrometer. The interface resistance of DSSC was measured by electrochemical impedance spectroscopy. Compared with the photovoltaic conversion efficiency of 3.50% based on pure TiO2 photoelectrode, it is found that the optimal photovoltaic conversion efficiency of 4.35% is achieved when the phosphorene is introduced to TiO2 photoelectrode, and the efficiency increases by 24%. More than that, silver (Ag) was deposited by radio frequency sputtering to modify the conventional platinum (Pt) counter electrode to enhance the redox reaction between electrolyte and dye molecule. The reason is because Ag has the highest electrical conductivity in metal, and the lattice strain effect will increase the surface absorption ability of film. The silver modified Pt counter electrode with different Ag thicknesses was investigated for electrical conductivity and catalytic activity. The surface morphology of Pt/Ag counter electrode was characterized by FE-SEM. The sheet resistance of Pt/Ag counter electrode was measured by 4-point probing system. The interface resistance of DSSC was measured by electrochemical impedance spectroscopy. Compared with the pure Pt counter electrode, the silver modified Pt counter electrode can provide a higher electrical conductivity and a superior catalytic activity. Moreover, the photovoltaic conversion efficiency of DSSC can be enhanced from 3.82% with the Pt counter electrode to 4.46% with the Pt/Ag counter electrode, and the efficiency increases by 16%. Finally, the DSSC of optimal composited films with phosphorene-TiO2 photoelectrode and Pt/Ag counter electrode was investigated under low illumination. The photovoltaic conversion efficiency of the DSSC can be enhanced from 4.76% under illumination of 100 mW/cm2 to 7.21% under illumination of 1.75 mW/cm2 and the efficiency increases by 52%.
author2 LAI, CHIH-HSIEN
author_facet LAI, CHIH-HSIEN
CHUANG, YI-HSUAN
莊易軒
author CHUANG, YI-HSUAN
莊易軒
spellingShingle CHUANG, YI-HSUAN
莊易軒
Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination
author_sort CHUANG, YI-HSUAN
title Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination
title_short Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination
title_full Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination
title_fullStr Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination
title_full_unstemmed Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination
title_sort fabrication of phosphorene modified titanium dioxide photoelectrode and silver modified platinum counter electrode for dye-sensitized solar cells under low illumination
publishDate 2018
url http://ndltd.ncl.edu.tw/handle/9ask5v
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