Layers Of Self-assembly Constructing One-dimensional/zero Wiener M Tio < Sub > 2 < / Sub > Composite Light Anode

Dye sensitized solar cells （DSSCs） are one hot field researching solar cells, which aredue to their low production cost and high energy conversion efficiency. Generally,DSSCs are composed of a nanocrystalline semiconductor oxide thin-flm electrode, dyesensitizers, electrolytes, and a counter electrode. Thereinto, photoanodes are used as thesupporter of adsorbing dye and the channel of transferring photogenerated electrons,which determine the efficiency of DSSCs to a great extent. In this paper, with the aim tofabricate DSSCs of high performances, we utilize layer-by-layer assembly method tobuild one-dimension/zero-dimension composite photoanodes of DSSCs, which hold itshigh absorbtion of dyes and enhance the efficiency of transferring photogeneratedelectron in the interface. Combined with SPV technique and electrochemical impedancespectroscopy, we studied the driving force of photogenerated electrons and thetransferring rate of the interfacial charge The main contents of this paper as follows:1. Utilize LBL-assembly method to bulid TiO₂（B） nanowire/TiO₂nanoparticlesout-phase composite photoanode, and assemble dye-sensitised cells. The TiO₂（B）nanowire/TiO₂nanoparticles out-phase composite solar cell of adsorption times ofn=5can achieve the highest photoelectric conversion efficiency8.06%, which ishigher than that of the pure TiO₂（B） nanowire and TiO₂（B） nanowire-TiO₂nanoparticles mechanical mixture ones. This is because that the kind of out-of-phasecomposite structure has a great driving force of injection and the smallest interfacetransmission resistance （Rct=0.62Ω）.2. Utilize LBL-assembly method to bulid TiO₂nanopillars/TiO₂nanoparticlesout-phase composite photoanode, and assemble dye-sensitised cells. The TiO₂nanopillars/TiO₂nanoparticles composite solar cell of adsorption times of n=5canachieve the highest photoelectric conversion efficiency8.06%, which is higher than that of the pure TiO₂nanopillars and TiO₂nanopillars-TiO₂nanoparticlesmechanical mixture ones. This is because that the kind of composite structure has agreat driving rate of injection and the smallest interface transmission resistance （Rct=0.2Ω）.3. Utilize LBL-assembly method to bulid TiO₂nanopillars/High-performance-TiO₂nanoparticles composite photoanode, and assemble dye-sensitised cells. Because thehigh-performance-TiO₂nanoparticles can not adsorb on the the surface of TiO₂nanopillars on very well, photoelectric conversion efficiency is low, the highest for5.22%.