Dye-sensitized solar cells based on a nanoparticle/nanotube bilayer structure and their equivalent circuit analysis.
Dye-sensitized solar cells based on a nanoparticle/nanotube bilayer structure and their equivalent circuit analysis.
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DOI：
10.1039/c2nr11617k
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发表时间：
2012-01
期刊：
影响因子：
6.7
通讯作者：
Xukai Xin;Jun Wang;W. Han;M. Ye;Zhiqun Lin
中科院分区：
文献类型：
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作者：
Xukai Xin;Jun Wang;W. Han;M. Ye;Zhiqun Lin
利用由P-25纳米颗粒和独立晶体纳米管阵列组成的TiO(2)双层结构作为光阳极，制备了染料敏化太阳能电池（DSSCs）。经过连续的TiCl(4)处理和O(2)等离子体暴露后，双层光阳极用N719染料敏化。采用20 μm tio2(2)纳米颗粒薄膜和13 μm tio2(2)纳米颗粒和7 μm tio2(2)纳米管制备的DSSCs的功率转换效率最高，分别为8.02%和7.00%。基于等效电路模型仿真获得的J-V参数分析，与P-25纳米粒子相比，纳米管中有利的纳米管结构有利于电荷在纳米管中的输运，而由于纳米管的表面积小，光电流减少，从而导致染料负载低，并且锐钛矿和金红石相缺乏协同效应。
Dye-sensitized solar cells (DSSCs) were prepared by capitalizing on a TiO(2) bilayer structure composed of P-25 nanoparticles and freestanding crystalline nanotube arrays as photoanodes. After being subjected to sequential TiCl(4) treatment and O(2) plasma exposure, the bilayer photoanode was sensitized with N719 dye. DSSCs based on a 20 μm TiO(2) nanoparticle film solely and a bilayer of 13 μm TiO(2) nanoparticles and 7 μm TiO(2) nanotubes exhibited the highest power conversion efficiency, PCE, of 8.02% and 7.00%, respectively, compared to the devices made of different TiO(2) thicknesses. On the basis of J-V parameter analysis acquired by equivalent circuit model simulation, in comparison to P-25 nanoparticles, charge transport in nanotubes was found to be facilitated due to the presence of advantageous nanotubular structures, while photocurrent was reduced owing to their small surface area, which in turn resulted in low dye loading, as well as the lack of cooperative effect of anatase and rutile phases.