摘要：本文采用水热法制备质子钛酸盐，并在制备过程中分别加入Sn、Ni、Zn盐，最后在高温下烧结制得含不同金属离子的二氧化钛颗粒。通过X射线衍射(XRD)和透射电镜(TEM)对样品的晶体结构和形貌进行了表征。通过紫外-可见光光谱(UV-Vis)对样品的光吸收特性进行了分析。采用光电流-光电压曲线(I-V曲线)测试电池的短路光电流、开路光电压以及太阳能电池的光电转化效率。采用交流阻抗(EIS)、强度调制光电流谱(IMPS)和强度调制光电压谱(IMVS)研究电子传输动力学性能。研究发现，100℃样品中掺杂离子后的二氧化钛纳米颗粒电池的光电性能有了显著的提高，尤其是掺锌样品的光电转换效率最高，达到了2.97％，较纳米颗粒的性能有1.68倍的提高。电子传输动力学性能研究表明颗粒样品的电子传输动力学性能都比较差，但掺Sn样品的传输动力学性能要好于其他三个样品。150℃样品中二氧化钛纳米颗粒样的光电性能比掺杂样好，为1.82％。而四种样品的电子传输动力学性能同样较差。
关键词：染料敏化太阳能电池；二氧化钛；离子掺杂；光电性能；电子传输动力学
Abstract: In this work, protonated titante were prepared by hydrothermal method. Sn, Ni and Zn salt was added into the particles in preparation process. Subsequently titanium dioxide particles doped with these metal cation were obtained after calcination at 500 ℃. The crystal structure and morphology of samples were represented by X-ray diffraction(XRD) and transmission electron microscope(TEM). Light absorption characteristics were analyzed by ultraviolet visible (UV-Vis). Photoelectric properties were tested by photocurrent-voltage(I-V) Curve. Electrochemical impendence spectroscopy(EIS), intensity-modulated photocurrent spectroscopy(IMPS) and intensity-modulated voltage spectroscopy(IMVS) were used to investigate the kinetics process of these cells. It is indicated that photoelectric properties of titanium dioxide nanoparticles doped with metal ions were significantly improved in samples prepared at 100℃.The photoelectric properties of the sample doped with Zn was the best. The photoelectric conversion efficiency of the sample is 2.97％. It is increased by 1.68 times as compared to that of nanoparticles. The electron transfer kinetics property show that particle samples all have poor performance, but the sample doped with Sn is better than the others. In samples prepared at 150℃,the photoelectric conversion efficiency of nanoparticle sample is 1.82％.It is better than the simples doped with metal cation. And electron transport kinetics performance of these cells are all poor.
Keywords: dye sensitized solar cell(DSSC);titanium dioxide;ion doping; photoelectric properties; electron transport dynamics
