Application Of Three-dimensional ZnO Inverse Photonic Crystal In Dye-Sensitized Solar Cells

Asanewtypeofsolarbattery, theDSSCattractpeople’sconcernextensivelyforitslowcostandsimplepreparationpr ocess. Howtoimproveitsphotoelectricconversionefficiencyisthemosturgentproblem. Photoniccrystalmaterialsarethenewresearchfieldsofmaterialsoverthelast20years. BecauseofitsfeaturesofphotoniclocalizationandPBG, thephotoniccrystalscanbecoupledtoDSSCtoincreasetheconversionefficiency.Thr oughexploringthepreparationoflargeinverseopalstructureofZnO,weattempttoappl ethephotoniccrystalstotheDSSCtoimproveitsefficiency.Inthispaper, throughexploringthepreparationoflargeinverseopalstructureofZnO, weattempttoapplythephotoniccrystalstotheDye-SensitizedSolarCells (DSSC) toimproveitsefficiency.Thecolloidalcrystaltemplateispreparedbyself-assembledonFTOsubstrates, andthree-dimensionalZnOinverseopalissynthesizedviaanelectrochemicaldepositi onmethodinzincnitratesolution.Thenwestudytheinflationsofitssurfacemorphologyandphotonicbandgaponthesola rcell’sphotoelectricconversionefficiency.The main work of this paper is summarized as follows:1.The colloidal crystal templates with different sphere diameter are prepared by self-assembled on FTO substrates.We obtain structure with appropriate thickness and uniform surface.2. The colloidal crystal templates are infiltrated via an electrochemical deposition method.We discuss the influence of different potential and temperature, and choose the optimal condition to obtain a large area of three-dimensional ZnO inverse photonic crystals with ideal structure.In addition, TiO2inverse photonic crystals are prepared as well. 3. TheZnO inverse photonic crystals with varied bandgap are applied toDSSC to explore the influence of the bandgag.When the bandgap approach theabsorption maximum of the dye,the efficiencyis relatively high.