Research On Al Doped SnO₂ Dye Sensitized Solar Cells

The dye-sensitized solar cell as the third generation of new type of solar cell which characteristic is that the preparation process is simple,low cost,no environmental pollution emissions of harmful substances,so it has good application prospects.The dye-sensitized solar cell with TiO2 as the conductive film of the photoelectric conversion rate has reached 11%,but due to the materials,dyes.The structure and properties of the electrolyte is not the perfect combination of existing electron hole in which the transmission does not reach the external circuit composite phenomenon:This is due to the existence of surface structure in battery material,to increase the probability of electron and electrolyte composite,dark current increases,thus reducing efficiency.With other semiconductor oxide film as anode system preparation of thin film solar cell has become a hot research topic in dye-sensitized solar cells.This paper discusses the dye-sensitized solar cell SnO2 semiconductor thin film,Sn O2 is a direct wide band gap semiconductor material,the band gap is3.6eV.SnO2 with electron transfer rate and wider band gap higher than TiO2.The study include battery light anode,the research on electricity,dyes,electrolytes the research.This paper mainly studies the Al3+ doped SnO2 films for dye-sensitized solar cells based on cell anode is made of organic dye sensitized N719 SnO2 nano film,SnO2 nanostructured semiconductor materials with wide band gap,band gap(3.6eV),wide band gap is conducive to electronic transmission,effectively prevent the Preparation method of1.Al3+ doped SnO2 quantum dots is hydrothermal method,in order to compare the photoelectric conversion efficiency under different conditions of the battery,the Al3+ doped SnO2 quantum dots 11 different ratios were prepared,the effects of different characters Al3+ doped SnO2 thin film photoanode on the photoelectric conversion efficiency of dye-sensitized solar cell.The experimental conditions are using electronic scale weigh 21.04 grams of Sncl4,5H2 O,and weigh in proportion to Al(NO3)3 calls 9H2 O,made of nano powder,through TEM,SEM and UV Vis Spectrum Characteristic Analysis Instrument and XRD of powder.According to the mass ratio of two tin oxide 3:3.5:1:: terpineol ethyl cellulose to prepare slurry.composite exciton.2.prepare slurry of Al3+ doped SnO2 dye-sensitized solar cells,compared to group analysis of influencing factors of photoelectric conversion,a comprehensive analysis of the subjective and objective conditions,FESEM,XRD,TEM,UV Vis absorption spectra characteristics and performance analysis of thin films,as well as to achieve the photoelectric conversion efficiency of the optimal objective.With Al3+doped SnO2 dye-sensitized solar cells,mainly because the band gap of SnO2,make the battery light absorption and good stability.By comparing the concentration of Al3+ is moderate,make the battery photoelectric conversion efficiency was the highest.Compared to undoped SnO2 dye-sensitized solar cell photoelectric conversion efficiency is 1.3,the photoelectric conversion efficiency of Al3+ dopedbattery up to 2.2,so 0.9 points higher,improve the short-circuit current density of4.72mAcm-2 to 5.96mAcm-2.