柔性TiO_2纳米管薄膜电极的制备及其光电性能

Preparation and Photoelectric Performance of Flexible Titania Nanotubes Thin Film

采用水热合成法制备出TiO2纳米管,通过XRD、TEM和氮气等温吸附-脱附仪等测试手段对TiO2纳米管进行了表征.用烧结的TiO2纳米管和P25粉末混合制成薄膜电极,并研究了薄膜电极的表面形貌、染料吸附量和光电性能.研究表明,加入TiO2纳米管可以制备出机械稳定的薄膜;掺杂TiO2纳米管的含量越多,薄膜电极的染料吸附量越大;掺杂5%烧结纳米管粉末的薄膜电极的光电性能最好,其短路电流可达3.25mA,光电转换效率达到1.67%.

The titania nanotubes were synthesized by hydrothermal process. TiO2 nanotubes were characterized by means of TEM, XRD and nitrogen adsorption-desorption isotherms. The TiO2 thin film electrodes were prepared by the titania nanotubes and P25, the surface morphologies, dye loading and photoelectric performance of the film electrodes were analyzed. It is found that the film electrodes are mechanical stable with the addition of the titania nanotubes, The more titania nanotubes film electrodes contain, the higher dye they absorb. When the content of titania nanotubes is 5 %, the best photoelectric performance of the film electrodes can be achieved. Its short circuit current of flexible DSSC is 3.25 mA with 1.67 % solar-to-electric energy conversion efficiency.