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时间:2020-03-27
《简易模板剂法制备多级介孔TiO2微球及其在染料敏化太阳能电池中的性能.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~(WuliHuaxueXuebao182ActaPhys.一Chim.Sin.2013,29(1),82-88January[Article]doi:10.3866/PKU.WHXB201211071www.whxb.pku.edu.cn简易模板剂法制备多级介孔TiO2微球及其在染料敏化太阳能电池中的性能郭薇’王开’沈艺花’张贺翁韬马廷丽,(大连理工大学化工学院,精细化工国家重点实验室,辽宁大连116024;营口奥匹维特新能源科技有限公司,辽宁营口115003)摘要:采用模板剂法一步合
2、成分级结构的介孔TiO微球,考察了烷基胺类模板剂中烷基链长度对介孔TiO微球合成及性能影响.将其应用于染料敏化太阳能电池的光阳极半导体薄膜中,得到了9.52%一10.15%的高能量转换效率.X射线衍射(XRD)、物理吸附仪(BET)、扫描电镜(SEM)等的分析结果表明:分级结构介孔TiO微球的晶相为纯锐钛矿型:介孔TiO。微球表面粗糙,是由14—18nm的纳米粒子堆积形成,使微球具有介孔性质和较适宜的比表面积.介孔TiO:微球堆积形成了利于物质扩散的通道并具有良好的光散射效果:同时微球介孔粗糙表面
3、保证了染料的大量吸附,从而提高了电池的光电流.通过电化学阻抗分析结果验证了分等级结构介孔TiO微球光阳极有利于电解液的传输和物质扩散的优异性能.关键词:染料敏化太阳能电池:光阳极:TiO球体:纳米结构:光电转换中图分类号:0649;0644ASimpleTemplateSynthesisofHierarchicallyMesoporousTi02MicrosphereforDye-SensitizedSolarCellsGUOWei’WANGKai’SHENYi.Hua’ZHANGHeWENGTa
4、oMATing—Li’-。_(StateKeyLaboratoryofFineChemicals,SchoolofChemicalEngineering,DalianUniversityofTechnology,Dalian116024,LiaoningProvince,PR.China;)TngkouOpvtechNewEnergyCo.Ltd.,Yingkou115003,LiaoningProvince,PR.China1Abstract:MesoporousTiO2microspheres
5、weresynthesizedusingasimpletemplatemethod.TheefectofthealkylchainlengthonthesynthesisandpropertiesoftheTiO2microsphereswasstudied.Ahighpowerconversioneficiency(9.5%一10.1%)wasattainedbythedye—sensitizedsolarcells(DSCs)fabricatedwithlhehierarchicallymes
6、oporousTi02microspheref¨ms.ThephysicalpropertiesoftheTiO2microsphereswereanalyzedbyX—raydiffraction(XRD),N2physisorption(BET),andscanningelectronmicroscopyfSEM).TheresultsindicatedtheTiO2microspherecrystalstructuretobeinlhepureanatasephase;theroughsur
7、facemicrostructureoftheTiO2microspheres,formedthroughaccumulationofnanocrystalline(14—18nmdiameter)TiO2particles,providesaproperlargesurfaceareaandmesoporousstructure.ThehierarchicallymesoporousTiO2microspherescanf0rmgoodpathsformasstransport,andalsoa
8、ctaslightscatteringlayersforeficientlightharvesting.Meanwhile.theroughTiO2microspheresurfaceensuresasuficientamountofdyeuptake,andconsequentlyimprovesthephoto—generatedelectrondensity.Electrochemicalimpedanceanalysisdemonstratedtheadvantageofu
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