锌掺杂对TiO2染料敏化电池光阳极中电荷俘获态分布及电子复合过程的影响

摘要

基于瞬态光电压和瞬态光电流技术研究了锌掺杂的TiO2染料敏化太阳能电池中电子复合及传输的动力学行为.通过实验获得了不同阳极掺杂条件下的电子复合时间常数与电子收集时间常数,考察了锌掺杂对电池阳极材料导带能级和电子俘获态的影响.研究结果表明,锌的掺杂在提高TiO2导带能级的同时延长了俘获态电子的复合时间常数,从而大大提高了电池的开路电压.%By measuring the photo-voltage and photo-current transients, the charge recombination and transporting dynamics in a series of zinc-doped titania based dye-sensitized solar cells (DSCs) were investigated. Based on the electron recombination and charge collection time constants, zinc-doping effects to the conduction band levels and the trap state distribution of anode were found. The results show that the zinc-doping enhanced the open-circuit voltage of DSCs by raising the conduction band levels and elongating the electron recombination time constants.