染料敏化太阳能电池用TiO_2薄膜电极的改性制备及光电化学性能

摘要

The tetraisopropyl titanate was used as titaniume source to prepare the TiO_2 nanomaterial by the hy-drothermal method. The TiO_2 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 TiO_2 pellets have all the same shape and a particle size of approximately 17?8 nm. After nickel doping, the granularity increased obviously, but still maintained the even condition and the vesicular structure. Compared with the ordinary TiO_2 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%.%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TiO_2纳米材料. 采用金属镍掺杂和表面包覆一层氧化钕, 对TiO_2薄膜电极进行改性研究. 实验结果表明, 所制备纳米TiO_2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TiO_2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%.