| 基于Zn_2SnO_4纳米线固态染料敏化太阳能电池光生电荷分离与光电性质研究 |
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| 作者单位： | ;1.河南大学物理与电子学院 |
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| 摘 要： | 采用水热法在不锈钢滤网上制备出Zn2SnO4纳米线.首次通过制备Zn2SnO4纳米线/CBS异质结构来提高复合体系的光生电荷分离效率;逐步改变CBS厚度系统研究了Zn2SnO4纳米线/CBS染料敏化太阳能电池的光电转换效率.结果表明Cu4Bi4S9为1.0μm时,Zn2SnO4纳米线/Cu4Bi4S9异质结具有最强稳态和电场诱导表面光伏效应,对应染料敏化电池最高光电转换效率为4.12%.从光吸收、薄膜厚度、内建电场和能级匹配等几个方面,讨论了异质结和固态染料敏化电池中光生电荷分离的影响因素以及光生电荷传输机制.
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| 关 键 词： | 表面光电压谱 光伏响应 异质结 染料敏化太阳能电池 |
Separation of Photogenerated Charges and Photoelectric Properties in Solid State Dye-Sensitized Solar Cells with Zn_2SnO_4 Nanowires |
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| Institution: | ,School of Physics & Electronics,Henan University |
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| Abstract: | Zn2SnO4 nanowires were synthesized on stainless steel filter with hydrothermal method.Zn2SnO4nanowires/Cu4Bi4S9 heterojunction was first prepared to increase the separation efficiency of photogenerated charges in composite system.Here,the overall light-to-electricity efficiencies of several Zn2SnO4 nanowires/Cu4Bi4S9dye-sensitized solar cells were studied systematically with changing Cu4Bi4S9 thickness gradually.With Cu4Bi4S9 of 1.0μm thickness,there are the highest steady state and electric field induced surface photovoltage,and the corresponding Zn2SnO4 nanowires/Cu4Bi4S9 solar cells exhibits the highest photoelectric conversion efficiency of 4.12%.From the absorption,thickness of film,build-in electric field and energy level matching,etc.,the separation process and transport mechanism of photogenerated charges in Zn2SnO4nanowires/ZnFe2O4 heterojunctions and solid state dye-sensitized solar cells were analysed in detail. |
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| Keywords: | surface photovoltage spectroscopy photovoltaic response heterojunction dye-sensitized solar cells |
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