Growth Of TiO₂Nanowire Array And Its Application In Dye-Sensitized Solar Cells

1D single-crystal TiO2nanowire arrays have been widespread concerned inphotoelectrochemical research field, due to its excellent photo-generated charge sep-aration and transport properties. Especially controllable preparation and application ofTiO2single-crystal nanowires arrays have been extensively studied at home and ab-road in recent years. In this paper, hydrothermal and solvothermal were used to studythe factor of one-dimensional TiO2nanowire arrays’preparation. The results prove thathigh specific surface preparation methods of TiO2nanowire arrays have been done,and the photoelectric conversion efficiency get to5.46%of the dye-sensitized solarcell. The details are as follows:TiO2nanowire arrays prepared by hydrothermal synthesis, researching the influ-ence of the growth substrate, reaction time, the content of hydrochloric acid and sodi-um chloride, dopamine, PVP, PEG and other additives on growth of TiO2nanowirearrays. The results show that increasing the sodium chloride and hydrochloric acid inthe reaction system significantly inhibited the growth of nanowires radially.Prepared by solvethermal synthesis, studying the reaction of precursor (titaniumsource, DEG, hydrochloric acid) concentration, reaction time, reaction temperaturethermal influence the growth of TiO2nanowire arrays. The results show that, thesolvent system is beneficial to prepare large specific area of TiO2nanowire arrays. Wecan oriented high density nanowire arrays in few hours.With2hours solvethermal preparation of TiO2nanowire arrays for photo-anodeof the device. Study titanate nanosheets (TN) of the seed layer, thermal annealing andUV ozone treatment on the performance of the device. The results show that, thepreviously deposited seedlayers is not only offer the nucleation sites, but also form ablocking layer on the surface of FTO. The photoelectric conversion efficiency of thedevice has reached4.36%, compared with without seedlayer is increased by6%.UV/O3treatment effectively removes carbon from TiO2nanowire array surface,improving the photoelectric conversion efficiency to5.46%, showing excellentphotovoltaic conversion characteristics.