Synthesis of Zn-doped TiO2 microspheres with enhanced photovoltaic performance and application for dye-sensitized solar cells
Synthesis of Zn-doped TiO2 microspheres with enhanced photovoltaic performance and application for dye-sensitized solar cells
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具有增强光伏性能的Zn掺杂TiO2微球的合成及其在染料敏化太阳能电池中的应用
DOI：
10.1016/j.electacta.2011.04.118
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发表时间：
2011-07-15
影响因子：
6.6
通讯作者：
Xie, Tengfeng
中科院分区：
文献类型：
--
作者：
Zhang, Yu;Wang, Lingling;Xie, Tengfeng
通过向反应体系中引入微量的硝酸锌，制备了Zn掺杂的TiO2微球。利用扫描电子显微镜（SEM）、场发射扫描电子显微镜（FESEM）、X射线衍射（XRD）和X射线光电子能谱（XPS）对样品进行了表征。基于锁相放大器的表面光电压谱（SPS）技术和瞬态光电压（TPV）测量结果表明，Zn的少量掺杂可以促进光生电荷的分离，同时由于强的界面内建电场和表面陷阱态的减少，抑制了复合。与基于未掺杂的TiO 2的电池相比，基于Zn掺杂的TiO 2的染料敏化太阳能电池（DSSC）的光伏参数显著更好。讨论了DSSC的性能与其光伏特性之间的关系。(C)2011爱思唯尔有限公司保留所有权利。
Zn-doped TiO2 microspheres have been synthesized by introducing a trace amount of zinc nitrate hexahydrate to the reaction system. Scanning electron microscope (SEM), field-emission scanning electron microscope (FESEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) have been utilized to characterize the samples. Both surface photovoltage spectroscopy (SPS) technique based on lock-in amplifier and transient photovoltage (TPV) measurement reveal that the slight doping of Zn can promote the separation of photo-generated charges as well as restrain the recombination due to the strong interface built-in electric field and the decreasing of surface trap states. The photovoltaic parameters of dye-sensitized solar cells (DSSCs) based on Zn-doped TiO2 are significantly better, compared to that of a cell based on undoped TiO2. The relation between the performance of DSSCs and their photovoltaic properties is also discussed. (C) 2011 Elsevier Ltd. All rights reserved.