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Synthesis and characterization of Fe-doped TiO_2 hollow spheres for dye-sensitized solar cell applications

机译：Fe掺杂TiO_2中空球体用于染料敏化太阳能电池应用的合成与表征

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摘要

Fe-doped TiO_2 hollow spheres (THs@Fe) with various Fe contents, 0, 0.25, 0.50, 0.75 and 1.00 mol％, were prepared using carbon templates and further employed as photoanode for dye-sensitized solar cells. The analytical results indicated that the hollow structure of THs@Fe promoted an effective light penetration and scattering capability, which resulted in increased light-harvesting efficiency. The increase in specific surface area and pore volume caused enhancement of dye molecules adsorbed on the photoanodes, which directly affected the performance of the DSSCs. The highest power conversion efficiency, 6.025 ± 0.141％, was obtained from 18NR/THs@0.25Fe bilayer photoelectrodes with a J_(SC) of 15.392 ± 0.458 mA cm~(-2), V_(OC) of 0.759 ± 0.001 V, and FF of 0.516 ± 0.018. The highest achieved PCE value was attributed to formation of oxygen vacancies and other defect states generating the shallow electron traps that are essential for charge transport, electron lifetime and resulted in the DSSCs performance.
机译：使用碳模板制备具有各种Fe含量，0,0.25,0.50,0.75和1.00mol％的Fe掺杂的TiO_2空心球（THS @ Fe），并进一步用作染料敏化太阳能电池的光电码。分析结果表明，THS @ Fe的中空结构促进了有效的光渗透和散射能力，导致光收获效率增加。比表面积和孔体积的增加导致吸附在光阳极上的染料分子的增强，这直接影响了DSSC的性能。最高功率转换效率，6.025±0.141％是从18nr/ths@0.25fe双层光电系数获得的，其中j_（sc）为15.392±0.458 mA cm〜（-2），V_（oc）为0.759±0.001 V，和FF为0.516±0.018。最高达到的PCE值归因于氧空位的形成和产生浅电子疏水陷阱的浅电子捕集器，这对于电荷传输，电子寿命是必不可少的并且导致DSSCS性能。

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