Effect of Annealing Temperature on the Photoelectrochemical Properties of Dye-Sensitized Solar Cells Made with Mesoporous TiO2 Nanoparticles
Effect of Annealing Temperature on the Photoelectrochemical Properties of Dye-Sensitized Solar Cells Made with Mesoporous TiO2 Nanoparticles
复制标题
DOI：
10.1021/jp800127x
复制
发表时间：
2008-05
影响因子：
3.7
通讯作者：
De Zhao;T. Peng;Lanlan Lu;P. Cai;P. Jiang;Z. Bian
中科院分区：
文献类型：
--
作者：
De Zhao;T. Peng;Lanlan Lu;P. Cai;P. Jiang;Z. Bian
采用介孔TiO2 （m-TiO2）纳米颗粒制备染料敏化太阳能电池（DSSCs）的多孔膜电极。采用x射线衍射（XRD）、透射电镜（TEM）、扫描电镜（SEM）、电化学阻抗谱（EIS）和开路光电压衰减曲线（OCVD）对制备的m-TiO2多孔电极进行了表征。实验结果表明，m-TiO2多孔膜内的体积陷阱和表面状态对DSSCs中光注入电子复合过程的影响取决于退火温度。此外，自制的m-TiO2纳米粒子比无孔TiO2纳米粒子（P25）具有更高的光电转换效率。m-TiO2纳米颗粒在500℃退火后仍能保持其内部的介观结构，这有利于染料吸附，进而提高DSSCs的光电化学性能。
Mesoporous TiO2 (m-TiO2) nanoparticles were used to prepare the porous film electrodes for the dye-sensitized solar cells (DSSCs). The obtained m-TiO2 porous electrodes were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), electrochemical impedance spectra (EIS), and open-circuit photovoltage decay curves (OCVD). Experimental results indicate that the effect of bulk traps and the surface states within the m-TiO2 porous films on the recombination processes of the photoinjected electrons in DSSCs depends on the annealing temperature. Moreover, the homemade m-TiO2 nanoparticles show much higher photoelectric conversion efficiency than the nonporous TiO2 nanoparticles (P25). The mesostructures within the m-TiO2 nanoparticles, which can be maintained even after annealing at 500 °C, are of great benefit to the dye adsorption, and then to the improvement of the photoelectrochemical properties of DSSCs.