Preparation of nano C-ZnO/SnO2 composite photoanode via a two-step solid state reaction with high efficiency for DSSCs
Preparation of nano C-ZnO/SnO2 composite photoanode via a two-step solid state reaction with high efficiency for DSSCs
复制标题
DOI：
10.1039/c5ra15054j
复制
发表时间：
2015-10
期刊：
影响因子：
3.9
通讯作者：
Qiuxiang Wen;Jia Zhuang;Quangui He;Dengfei Yang;Haimin Li;Jiang Guo
中科院分区：
文献类型：
--
作者：
Qiuxiang Wen;Jia Zhuang;Quangui He;Dengfei Yang;Haimin Li;Jiang Guo
采用两步固相反应（TSSR）法制备了ZnO、SnO 2、ZnO/SnO 2简单混合（S-ZnO/SnO 2）和ZnO/SnO 2复杂复合（C-ZnO/SnO 2）光阳极薄膜，并将其应用于DSSC。利用SEM、XRD和比表面积分析仪对薄膜进行了表征，并用紫外-可见分光光度计测量了薄膜的光学性能。测试电压-电流密度曲线（J-V）和入射光-电流转换效率（IPCE）以表征不同电池的性能。结果表明，C-ZnO/SnO 2光阳极具有更好的均匀膜结构，更大的表面积和染料负载量，这使得该器件具有更高的功率转换效率（PCE）为5.36%，相比于其他三种。电化学阻抗谱（EIS）分析表明，基于C-ZnO/SnO 2光阳极薄膜的器件具有较低的电子复合率和较长的电子寿命。
ZnO, SnO2, simple mixed ZnO/SnO2 (S-ZnO/SnO2) and complex composite ZnO/SnO2 (C-ZnO/SnO2) photoanode films were prepared and applied in DSSCs using a Two-step Solid State Reaction (TSSR) method. The photoanode films were characterized using SEM, XRD and a surface area analyzer, and their optical properties were measured with a UV-vis spectrophotometer. The voltage–current density curve (J–V) and incident photon-to-current conversion efficiency (IPCE) were tested to characterize the performance of the different cells. The results demonstrate that the C-ZnO/SnO2 photoanode shows a better uniform film structure, larger surface area and dye loading, which causes the device to have a higher power conversion efficiency (PCE) of 5.36% compared to the other three. A lower electron recombination rate and longer electron lifetime are confirmed for the device based on the C-ZnO/SnO2 photoanode film by analysis with electrochemical impedance spectroscopy (EIS).