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采用直流反应磁控溅射法在FTO基底上制备了TiO2薄膜,研究了在不同氧流量条件下TiO2薄膜的拉曼光谱、表面形貌和透射光谱,并将TiO2薄膜用N719染料进行敏化,制备了染料敏化太阳电池,测试了电池的I-V特性曲线。实验结果表明:随着氧流量的增加,电池的短路电流和光电转换效率先增加而后降低,在15cm3时达到最大;薄膜为锐钛矿和金红石的混合晶体结构;氧流量对薄膜的表面形貌影响不大,薄膜都表现出疏松多孔的表面结构。
The TiO2 thin films were prepared on FTO substrates by DC reactive magnetron sputtering. The Raman spectra, surface topography and transmission spectra of TiO2 thin films were studied under different oxygen flow rates. The TiO2 thin films were sensitized with N719 dye. Dye-sensitized solar cells were prepared and the IV characteristics of the cells were tested. The experimental results show that the short-circuit current and photoelectric conversion efficiency of the battery increase first and then decrease with the increase of the oxygen flow rate, reaching the maximum at 15cm3; the film is a mixed crystal structure of anatase and rutile; the oxygen flow rate affects the surface morphology of the film Little effect, the film showed a loose porous surface structure.