A Study On Anode Structure And Sensitizing Technology Of Dye-Sensitized Solar Cell

This paper used a chemical dispersion method to prepare mesoporous nanocrystalline TiO2 thin film on FTO glass for dye-sensitized solar cell electrode, the film was sensited by N719 sensitizer and assembled simply to cells for testing performance.Finanlly the paper summarized the best conditions for preparing electrodes,which included the concentration of nitric acid dispersant,sintering temperature and time,the thickness of film.Before preparing film,the TiO2 power needed to be scattered. In this article we have used three methods to scatter power,which were grinding,water bath,and water bath with nitric.With grinding way the film had lots of cracks,but with water bath way the film didn't exsit crack but exsited lots of reunite particles,through water bath with nitric way we could obtain a good dispersion film without cracks and reunited particles.From the SEM images the film surface was porous.When Anode sintering temperature exceeded 550℃,the percentage of rutile increased dramatically, while the sintering time less affected on the percentage of rutile content.Optical performance test showed that short-circuit current increased with the sintering temperature increasing under 550℃,then the short-circuit current decreased.The film sintered for 90min at 550℃had best optical performance.The film thickness was another factor to affect the short-current.The short-circuit current increased with the thickness increasing,when the film thickness increased to 14μm , the short-circuit current started to decrease.The film needed to insert in N719 solution for 30h,the the short-circuit current tended to keep stable.The dye-sensitized electrode was assembled into cell and the performance as follow:(under LED:Voc=524mV,Jsc=0.72mA/cm2,and fill factor=0.59;under sun: Voc=602mV,Jsc=11.56mA/cm2,and fill factor=0.44,η=3.1%).