Preparation And Optimization Of Dye-Sensitized Solar Cell

Working principle of Dye-sensitized nanocrystalline thin film cells is simulatedphotosynthesis of plant can use solar energy. Multiaperture nanocrystalline TiO₂thinfilm undoubtedly is most vital step in every link of preparation of Dye-sensitized solarcells because of the efficiency of photo-electric of Dye-sensitized solar cells was largelydue to operating factor of sun’s rays of TiO₂electrode that adsorbed dye.The factors of TiO₂electrode decide operating factor of sun’s rays:⑴、Quantity ofdyes molecule’ adsorption;⑵、Length of light traveled in path;⑶、recombination rateof photon-generated carrier;⑷、TiO₂’ band gap width to decide can be exploited forrange of light’ frequencies.The review focuses on the impact factors of TiO₂electrode including adding aseries of optimized size scattering layer and the transport layer on rare earth erbiumdoped TiO₂modification. Add scattering layer can be solved in battery lighttransmission path short problem, because of the small particles TiO₂although havegreat specific surface area, can the dye molecules adsorption than the big particles, butthe small particles of nanometer TiO₂single-layer film almost is transparent, can’thappen light scattering effect, so the preparation of TiO₂film with single DSSCphotoelectric conversion efficiency are generally low if adding proper large particle sizeof TiO₂particles, there will be light scattering effects, and the growth of lightpropagation path, increase the repeated use. On rare earth ions of TiO₂erbium doped thepurpose is to make TiO₂particle growth better, restrain in high temperature firingsharply when titanium mine （anatase） to rutile （rutile） phase shift, as sharp titanium orein more suitable than rutile DSSC applications, and the appropriate rare earth doped inorder to open the DSSC voltage and the fill factor is not affected, because the role ofmaterial on the conversion of the sun can improve the utilization rate of the DSSC, sothe battery directly increase in the number of available photons, eventually improve thebattery short-circuit current and improve the overall efficiency of conversionphotoelectric battery.The article adopt methods of the hydrothermal sol-gel, integrate with polishing ofP25, compounded TiO₂thin film, photoelectronic properties of the DSSC wascharacterized by SEM，XRD，UV—vis and analyze sample’s surface topography andcrystal texture, caused response range of light. We need to control the content of large particles of TiO₂in the scattering layer added both to ensure the electronics from thefilm successfully transmitted to the external circuit to create a current, but also ensurethat the amount of the transport layer of dye adsorption and scattering of TiO₂thinfilms. The right amount of Er3+-doped corresponding to Er/TiO₂light response range tomove to the visible position, inhibit the increase of grain size and crystal phasetransformation and inhibition of photo-carrier complex.