Magonelli相二氧化钛光阳极在量子点敏化太阳能电池中的性能研究

Research on the Performance of Magonelli Phase Titanium Dioxide Photoanode in Quantum Dot Sensitized Solar Cells

使用产量与性能稳定的工业化生产的黑色TiO_(2)制备成量子点敏化太阳能电池(QDSSCs)的光阳极,通过性能表征与理论计算研究,与常见的Anatase TiO_(2),Rutile TiO_(2)展开了全面对比。结果表明,由于氧空位的引入导致Magonelli Ti_(8)O_(15)的导带底下降,带隙收缩,吸收光谱范围由紫外光扩展至可见光与近红外,而且吸光度也极大提高。其阻抗也随之减小,明显低于Anatase TiO_(2),Rutile TiO_(2)。这导致其组装的QDSSCs的性能获得极大提升,尤其是FF与Jsc表现最为显著,最终获得了能量转换效率(power conversion efficiency,PCE)5.301%优异成绩。本实验进一步丰富了黑色TiO_(2)的研究,在工业化生产黑色TiO_(2)组装太阳能电池领域取得了阶段性成果,为太阳能电池的生产提供新的可能。

Utilizing industrially produced black TiO_(2) with stable yields and performance to fabricate photoanodes for quantum dot sensitized solar cells(QDSSCs),comprehensive comparisons were conducted with commonly used Anatase TiO_(2) and Rutile TiO_(2) by performance characterization and theoretical calculations.The results indicate that the introduction of oxygen vacancies leads to a reduction in the conduction band minimum and a narrowing of the bandgap in Magonelli Ti_(8)O_(15),extending the absorption spectrum from ultraviolet to visible and near-infrared regions,accompanied by a significant enhancement in absorbance.Moreover,its impedance decreases markedly,notably lower than that of Anatase TiO_(2) and Rutile TiO_(2).Consequently,QDSSCs assembled with this material exhibit greatly improved performance,particularly in terms of fill factor(FF)and short-circuit current density(Jsc),ultimately achieving an outstanding power conversion efficiency(PCE)of 5.301%.This study contributes to the further understanding of black TiO_(2) and marks a significant advancement in the industrial application of black TiO_(2) in assembling solar cells,offering new possibilities for solar cell production.