Preparation and enhanced properties of dye-sensitized solar cells by surface plasmon resonance of Ag nanoparticles in nanocomposite photoanode

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• 作者：Kaimo Guo ; Meiya Li ; ^{myli@whu.edu.cn} ; Xiaoli Fang ; Xiaolian Liu ; Bobby Sebo ; Yongdan Zhu ; Zhongqiang Hu ; Xingzhong Zhao
• 关键词：Titanium dioxide coated silver core&ndash ; shell nanoparticles ; Surface plasmon resonance ; Absorption enhancement ; Composite photoanode ; Dye-sensitized solar cells
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：15 May, 2013
• 年：2013
• 卷：230
• 期：Complete
• 页码：155-160
• 全文大小：1291 K

文摘

A series of TiO₂ photoanodes with differing amounts of Ag nanoparticles (NPs) on TiO₂ in core-shell form (Ag@TiO₂) are prepared and used to make a series of dye-sensitized solar cells (DSSCs). The influence of different amounts of Ag-NPs on the structure and performance of the DSSCs is investigated. Studies indicate that the short-circuit current density (J_sc), open-circuit voltage (V_oc), charge lifetime and dark current of DSSCs containing Ag-NPs are significantly improved. The best performance is achieved in the DSSCs with 0.15?wt % Ag-NPs additions, with the maximum J_sc of 10.19?mA?cm^?2, highest V_oc of 698?mV and best photoelectric conversion efficiency of 5.33 % , significantly superior to that of the DSSCs with pure TiO₂ photoanodes. The increase of J_sc is attributed to the enhanced dye light absorption in strength and spectral range due to the surface plasmon resonance of Ag-NPs in photoanode, while the increase of V_oc may be related to the more negative level of the quasi-Fermi energy of Ag-TiO₂ composite system resulting from the added Ag.