Quantum-Dot Sensitized Solar Cell Prepared by Successive Ionic Layer Adsorption And Reaction
| Autor: | Chi-Hsiu Chen, 陳啟修 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 In this study, TiO2 photoelectrods were produced by spin-coating and screen-printing, then we choose TiO2 photoelectrod which produced by screen-printing as quantum dot sensitized solar cell photoelectrod. Cadmium sulfide (CdS) and cadmium selenide (CdSe) were sequentially assembled onto TiO2 photoelectrods, using a successive ionic layer adsorption and reaction (SILAR), to prepare TiO2/CdS/CdSe photoelectrode for quantum dot sensitized solar cell application. The effects of SILAR cycles to TiO2 on the performance of quantum dot sensitized solar cells was studied. The results showed that CdS/CdSe photoelectrode could absorb 400~700 nm wavelength. In the cascade structure of TiO2/CdS/CdSe photoelectrod, 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 quantum dots. The experimental results showed that the highest open-circuit potential 0.44 V, short-circuit current 10.8 mA/cm2, fill factor 0.54 and efficiency 2.41%, appeared at FTO/TiO2/CdS(5 layers)/CdSe(4 layers) photoelectrode. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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