Effect of N719–Dye Adsorption Into Composition of Different Sized TiO 2 Films for Photovoltaic Performance of the Dye-Sensitized Solar Cells
Effect of N719–Dye Adsorption Into Composition of Different Sized TiO 2 Films for Photovoltaic Performance of the Dye-Sensitized Solar Cells
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DOI：
10.1166/nnl.2013.1605
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发表时间：
2013-07
影响因子：
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通讯作者：
B. Munkhbayar;M. Dorjderem;D. Sarangerel;B. Ochirkhuyag
中科院分区：
文献类型：
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作者：
B. Munkhbayar;M. Dorjderem;D. Sarangerel;B. Ochirkhuyag
为了提高染料敏化太阳能电池的光伏效率，研究了通过以多种比例掺入小（~15 nm）和大（~300 nm）TiO 纳米粒子制备的 TiO2 薄膜中 N719 染料吸附的效果。掺入大、小二氧化钛纳米粒子后，光伏效率显着提高。根据实验结果，发现70%小TiO2：30%大TiO2的组合物是染料敏化太阳能电池最佳性能（5.57%）的最佳混合比例。这种高光伏性能归因于以下因素的影响。除了增加染料分子的吸附外，上层大TiO的光散射增强了太阳能电池的光收集，而下层小TiO确保了薄膜电极和氟掺杂氧化锡玻璃基板之间良好的电子接触。然而，我们发现具有 50% 小 TiO2 和 50% 大 TiO2 的组合物比其他 TiO2 混合物吸附了更多的 N719 染料分子，因此导致光伏性能下降。这种性能的下降可能归因于表面积的减少和染料聚集。
Effect of N719-dye adsorption into TiO films prepared via incorporating small (~15 nm) and large (~300 nm) TiO nanoparticles at several ratios were investigated to improve the photovoltaic efficiency of dye-sensitized solar cell. The photovoltaic efficiency is significantly improved after incorporation of large and small TiO nanoparticles. From experimental result, the composition with 70% small: 30% large TiO is found as an optimum mixing ratio for the best performance (5.57%) of a dye-sensitized solar cell. This high photovoltaic performance is attributed to an effect of following factors. Besides an increase in dye molecules adsorption, the light scattering of over layer large TiO enhances harvesting light of the solar cells and the under layer small TiO ensures good electronic contact between film electrode and the fluorine-doped tin oxide glass substrate. However, we found that the composition with 50% small: 50% large TiO was adsorbed much more N719-dye molecule than that of the other mixtures of TiO and hence resulting in a decrease photovoltaic performance. This decrement of performance may be attributed to the decreased surface area and dye aggregation.