Preparation Of Dye-Sensitized Solar Cell And Structural Optimization

Dye-sensitized Solar Cells （DSSC） has attracted scientists and enterprises from all overthe world to conduct basic researches and industrial developments because of its low cost,richresources,simple production process,stable and environmental performances and thephotoelectric conversion efficiency which is near to commercialization.Traditional DSSC isproducing a layer of porous nano-crystal oxide film on light anode transparent conductiveglasses （such as TCO/ITO/FTO） in certain methods,then making a kind of sandwich-shapedDSSC by sticking a large number of photosensitizers on the film and suitable redox ofelectrolyte.In this thesis,a new method of co-constructed design during the production ofDSSC,including double nano crystalline thin film electrode and lagging reflection.Thetechnological structure of DSSC is designed in this method and the structure and morphologyof the double nano crystalline TiO₂thin film are characterized by XRD and SEM images.Thedouble nano crystalline TiO₂thin film in large and small particles is printed on the conductingglass （FTO） in screen printing technology,which is used as the photoanode of the DSSC cellafter being soaked in the dye N3,which is combined with the counter electrode ofplatinum-coated transparent conductive glass （FTO） to be assembled into battery,whosephotoelectric property has been studied.The comparison between the experience result andtraditional structure shows the advancement and feasibility of this design method.in the study of photoanode of dye-sensitized solar cells, the study of porous TiO₂nano-film as photoanode is relatively mature,but there are relatively fewer studies and reportson nanotubes.When sunlight injects on one surface of the electrodes by passing through theplated platinum layer and electrolyte solution,the intensity of the incident light is decreasedbecause of the reflection of part of the sunlight.In order to solve this structural problem,in thisthesis,a layer of pure Ti film is plated on the conductive glass in magnetron sputteringmethod,then ordered arrays of TiO₂nanotubes are made by anodizing the Ti film,which is used as photoanode to be assembled into direct-style DSSC,then the cell optical and electricalproperties made from it is been studied.In summary,the structural improvement and optimization of DSSC put forward in thisthesis has improved the battery’s optical and electrical properties,so dye-sensitized solar cellswill surely have a greater development prospect.