Preparation of dye-sensitized solar cells with high photocurrent and photovoltage by using mesoporous titanium dioxide particles as photoanode material  

作　　者：Yi Zhang Bao Zhang Xiao Peng Lin Liu Shuo Dong Liping Lin Si Chen Shuxian Meng Yaqing Feng 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China

出　　处：《Nano Research》2015年第12期3830-3841,共12页纳米研究（英文版）

摘　　要：Several mesoporous TiO2 （MT） materials were synthesized under different conditions following a hydrothermal procedure using poly（ethylene-glycol）- block-poly（propylene-glycol）-block-poly（ethylene-glycol） （P123） as the template and titanium isopropoxide as the titanium source. The molar ratios of Ti/P123, and the pH values of the reaction solution in an autoclave were investigated. Various techniques such as Brunauer-Emmett-Teller （BET）, X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, laser Raman spectrometry （LRS）, scanning electron microscopy （SEM）, and high-resolution transmission electron microscopy （HRTEM） were used to characterize the products. Then, these materials were assembled into dye-sensitized solar cells （DSSCs）. Analysis of the J-V curves and electrochemical impedance spectroscopy （EIS） were applied to characterize the cells. The results indicated that the specific surface area and crystalline structure of these materials provide the possibility of high photocurrent for the cells, and that the structural characteristics of the specimens led to increased electron transfer resistance of the cells, which was beneficial for the improvement of the photovoltage of the DSSCs. The highest photoelectric conversion efficiency of the cells involving MT materials reached 8.33%, which, compared with that of P25- based solar cell （5.88%）, increased by 41.7%.几 mesoporous TiO ₂(MT ) 材料在跟随 poly 使用的一个热水的过程(乙烯乙二醇) 的不同条件下面被综合 -block-poly(propylene-glycol)-block-poly(ethylene-glycol)(P123 ) 作为是的模板和钛 isopropoxide 钛来源。Ti/P123 的臼齿的比率，和在一个压热器的反应解决方案的 pH 值被调查。象 BrunauerEmmettTeller (赌注) 那样的各种各样的技术， X 光检查衍射(XRD ) ， X 光检查光电子光谱学(XPS ) ，激光拉曼 spectrometry (LRS ) ，扫描电子显微镜学(SEM ) ，和高分辨率的传播电子显微镜学(HRTEM ) 被用来描绘产品。然后，这些材料被装配进敏化染料的太阳能电池(DSSC ) 。JV 曲线和电气化学的阻抗光谱学(EIS ) 的分析被使用描绘房间。结果显示特定的表面区域和这些材料的水晶的结构为房间提供高光电流的可能性，并且标本的结构的特征导致了，这增加了房间的电子转移抵抗，它为 DSSC 的 photovoltage 的改进是有益的。包含 MT 材料的房间的最高光电的变换效率到达了 8.33% ，与基于 P25 的太阳能电池(5.88%) 的相比，它增加了 41.7% 。

关 键 词：dye-sensitized solar cells mesoporous TiO2 high photocurrent and photovoltage 

分 类 号：O643[理学—物理化学] TM914.4[理学—化学]