Modification And Photoelectrochemical Research Based On Er/Nd-Boped TiO₂ Photoanode

The advantages of low cost and low pollution make DSSC become an importantdeveloping direction of the solar cell. Because photoanode made by nanomaterials is oneof the important component, massive research work focus on the anode material research.This paper's main research direction is anode material doping modification, prepareingand researching the materials of the Er/Nd doped TiO₂ electrode and Er,N co-doped TiO₂.The paper also carried out research on the surface modification of the photoanode,contrast with the research on the photoanode without modification.Er-doped TiO₂ nanoparticle with anatase has been prepared by a method sol-gel.Er-doped TiO₂ has been studied by kinds of electro-optic performance tests, such asXRD,SEM,SPS,XPS and so on. The results suggested that dye-sensitized solar cellswith such Er-doped TiO₂ have achieved higher conversion efficiency than that made ofpure TiO₂. When the 2at% Er-doped TiO₂ powder is blended with pure TiO₂ as anadditive at the optimal ratio of 7:5, the photocurrent density, voltage and the conversionefficiency of the cell increase to 13.38 mA cm-2, 0.78 V and 6.63%, respectively. WhileDSSC with Nd-doped TiO₂ and Er,N co-doped TiO₂ have not achieved higherconversion efficiency than that made of pure TiO₂.To get the purpose of raising the conversion efficiency of the DSSC, in thisexperiment we has used TiCl4 to modify the photoanode thin film s to shorten thetransmission path of photoinduced carrier and improve the structure of the cell. And inthe end, we got the purpose.