Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells
碩士 === 國立成功大學 === 化學工程學系碩博士班 === 96 === In this study, cadmium sulfide (CdS) and cadmium selenide (CdSe) quantum dots (QDs) were used as sensitizers of dye-sensitized solar cells (DSSCs). This two QDs were sequentially assembled onto a nanocrystalline TiO2 film, using a chemical bath deposition (CBD...
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ndltd-TW-096NCKU50630482016-05-09T04:14:19Z http://ndltd.ncl.edu.tw/handle/34479387328439333817 Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells 硫化鎘/硒化鎘之共增感效應在量子點敏化太陽能電池的應用 Yi-Siou Lo 羅亦修 碩士 國立成功大學 化學工程學系碩博士班 96 In this study, cadmium sulfide (CdS) and cadmium selenide (CdSe) quantum dots (QDs) were used as sensitizers of dye-sensitized solar cells (DSSCs). This two QDs were sequentially assembled onto a nanocrystalline TiO2 film, using a chemical bath deposition (CBD) process, to prepare a CdS/CdSe co-sensitized photoelectrode for QDs-sensitized solar cell application. The effects of CBD cycles and the positions of QDs respected to TiO2 on the performance of QDs-DSSCs are studied. The results showed that CdS and CdSe QDs have complementary effect in the light harvest, but the performance of a QDs co-sensitized solar cell is strongly dependent on the order of CdS and CdSe respected to the TiO2. In the cascade structure of TiO2/CdS/CdSe electrode, the alignment of the Fermi level between CdS and CdSe forms a stepwise structure of band-edge levels which is advantageous to the electron injection and hole-recovery of CdS and CdSe QDs. An energy conversion efficiency of 2.48% has been achieved using a ITO/TiO2/CdS(3)/CdSe(4) electrode. Besides, we deposited Zinc sulfide (ZnS) QDs onto the TiO2/CdS/CdSe electrode. The experimental results showed that ZnS can avoid the occurrence of leakage current and increase photostability. An energy conversion efficiency of 3.88% has been achieved in this study using a ITO/TiO2(13.55μm)/CdS(3)/CdSe(4)/ZnS electrode. Yuh-Lang Lee 李玉郎 2008 學位論文 ; thesis 109 zh-TW |
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碩士 === 國立成功大學 === 化學工程學系碩博士班 === 96 === In this study, cadmium sulfide (CdS) and cadmium selenide (CdSe) quantum dots (QDs) were used as sensitizers of dye-sensitized solar cells (DSSCs). This two QDs were sequentially assembled onto a nanocrystalline TiO2 film, using a chemical bath deposition (CBD) process, to prepare a CdS/CdSe co-sensitized photoelectrode for QDs-sensitized solar cell application. The effects of CBD cycles and the positions of QDs respected to TiO2 on the performance of QDs-DSSCs are studied. The results showed that CdS and CdSe QDs have complementary effect in the light harvest, but the performance of a QDs co-sensitized solar cell is strongly dependent on the order of CdS and CdSe respected to the TiO2. In the cascade structure of TiO2/CdS/CdSe electrode, the alignment of the Fermi level between CdS and CdSe forms a stepwise structure of band-edge levels which is advantageous to the electron injection and hole-recovery of CdS and CdSe QDs. An energy conversion efficiency of 2.48% has been achieved using a ITO/TiO2/CdS(3)/CdSe(4) electrode. Besides, we deposited Zinc sulfide (ZnS) QDs onto the TiO2/CdS/CdSe electrode. The experimental results showed that ZnS can avoid the occurrence of leakage current and increase photostability. An energy conversion efficiency of 3.88% has been achieved in this study using a ITO/TiO2(13.55μm)/CdS(3)/CdSe(4)/ZnS electrode.
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author2 |
Yuh-Lang Lee |
author_facet |
Yuh-Lang Lee Yi-Siou Lo 羅亦修 |
author |
Yi-Siou Lo 羅亦修 |
spellingShingle |
Yi-Siou Lo 羅亦修 Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells |
author_sort |
Yi-Siou Lo |
title |
Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells |
title_short |
Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells |
title_full |
Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells |
title_fullStr |
Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells |
title_full_unstemmed |
Co-Sensitization Effect of CdS/CdSe on The Quantum-Dots Sensitized Solar Cells |
title_sort |
co-sensitization effect of cds/cdse on the quantum-dots sensitized solar cells |
publishDate |
2008 |
url |
http://ndltd.ncl.edu.tw/handle/34479387328439333817 |
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