染料敏化太阳能电池用TiO2薄膜电极的改性制备及光电化学性能

以钛酸四异丙酯为钛源, 用水热法合成制备了具有典型锐钛矿晶型的TiO2纳米材料. 采用金属镍掺杂和表面包覆一层氧化钕, 对TiO2薄膜电极进行改性研究. 实验结果表明, 所制备纳米TiO2颗粒较均匀, 粒径约为17~18 nm. 经镍掺杂后, 颗粒团聚粒径明显增大, 但是仍保持均匀状态和多孔结构. 与改性前的TiO2薄膜电极相比, 金属掺杂和表面包覆有助于光生电子和空穴有效地分离, 电池的短路光电流提高了16%, 光电转换效率提高了17%.

Preparation and Modification of TiO_2 Thin Film Electrode in Dye-sensitized Solar Cell and Its Photoelectrochemical Properties

The tetraisopropyl titanate was used as titaniume source to prepare the TiO2 nanomaterial by the hydrothermal method. The TiO2 crystal is anatase. In order to enhance the electrode′s photoelectrochemical performance, the metal nickel doping and superficial gable neodymium oxide were used. The experimental results indicate that the nanometer TiO2 pellets have all the same shape and a particle size of approximately 17—18 nm. After nickel doping, the granularity increased obviously, but still maintained the even condition and the vesicular structure. Compared with the ordinary TiO2 thin film electrode, the metal doping and the superficial gable is helpful for separating the electron and the hole. The solar cell′s short circuit photoelectric current enhanced by 16% and the electro-optic transfer efficiency enhanced by 17%.