Preparation And Property Study Of Photoanode In Dye-sensitized Nano-TiO₂Solar Cells

Since1991Gratzel put forward the dye-sensitized nano-porous thin film solar cells（referred to as DSSC）, after20years of development, the dye-sensitized cell research has madegreat strides. In today’s energy-dominant era, the dye-sensitized solar cells have been widelyappreciated as a new energy research. Dye-sensitized solar cells is different from theadvantages of conventional solar cells as a new generation of solar cells, its low production cost,and simple fabrication process, and non-pollution.Moreover, the dye-sensitized solar cells havea higher theoretical photoelectric conversion efficiency and their applications are very widely.In the DSSC, nano porous film is the core of the battery, it directly determines thephotoelectronic generation and transmission, then affects the photoelectric efficiency.In thispaper, nano-porous TiO₂film photoanode is the focus of the study, system to researchthephotoanode preparation process and their doped.First, the preparation technology of TiO₂porous film photoanode was studied by theinvestigation of the film adsorption property. The amount of dye adsorption was evaluated bydesorbing method in the course of the study, and through the statistical analysis of orthogonaltest data to determine the best craft.The results of the study show that TiO₂photoanodes havethe best adsorption properties with sintering conditions of2℃/min heating to450℃andholding for50min, followed by furnace cooling; and with soaking conditions of soaking with5×10^-4mol/L N719dye solution for12hours when the temperature of the films dropped to60films℃, when the solar cells assembly also have the best photoelectric conversion efficiency.Second, TiCl4solution to deal with porous TiO₂film photoanode were studied, the studyfound that the TiCl4treatment can improve the DSSC performance obviously, when the TiCl4solution concentration was0.05mol/L and immersing time was0.5hour, the result was best，and the battery photoelectric conversion efficiency increased by47%, to4.17%.In addition, this paper was also studyed on ZnO doped for the TiO₂film photoanode. Theinfluence of different soaking concentration of zinc acetate solution for TiO₂film electrode wasstudied first,The study found that when the concentration of zinc acetate solution of0.3mol/L,preparation of the battery performance is the best; Secondly, the properties of DSSC withdifferent composite pastes were studied, experiments using three kinds of pastes: TiO₂pastes,C₄H₆O₄Zn·2H2O-TiO₂composite pastes and ZnO-TiO₂composite pastes, theC₄H₆O₄Zn·2H2O-TiO₂composite pastes preparation of the DSSC got the highest efficiencyreached3.90%, increased by24%than the TiO₂pastes.