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1、ElectrochimicaActa137(2014)744–750ContentslistsavailableatScienceDirectElectrochimicaActajournalhomepage:www.elsevier.com/locate/electactaNitrogen-dopedTiO2nanoparticlesbetterTiO2nanotubearrayphoto-anodesfordyesensitizedsolarcellsHong∗∗Wang,HongyiLi,JinshuWang,JunshuWu,DashengLi,
2、ManLiu,PengleiSuKeyLaboratoryofAdvancedFunctionalMaterials,SchoolofMaterialsandEngineering,BeijingUniversityofTechnology,Beijing100124,PRChinaarticleinfoabstractArticlehistory:Powerconversionefficiencyofdyesensitizedsolarcell(DSSC)iscloselyrelatedtophoto-anode’sstruc-Received20Dec
3、ember2013ture.Ithasbeenbelievedthattitaniumdioxide(TiO2)nanotubearraythinfilmisoneofthebestReceivedinrevisedform27March2014photo-anode24candidatesforDSSC.However,theinsufficientinternalsurfaceareaandwidebandgapMay2014AcceptedofAvailablepureanataselimittheirpowerconversionefficiency.
4、HerewereportanovelTiO2nanotubearrayfilmonline2June2014synthesizedbyanodizationfollowedbysurfacemodificationwithnitrogen(N)dopedTiO2nanoparticlesusingKeywords:asolvothermalmethod.TheincorporationofNdopedTiO2nanoparticlesalongthewallofTiO2nanotubesnotonlyprovidesalargesurfaceareaford
5、yeloading,butalsoincreasestheconductivityoftheTiOnanotube2arrayelectrode,dopinggeneratinganoverallpowerconversionefficiencyof2.53%,whichis68%higherthanthatwithpureTiO2nanotubearray(withthelengthof1.8m)photoanode.WhenthelengthofTiO2nanotubesurfacemodificationincreasedDSSCto4.1m,th
6、eoverallpowerconversionefficiencycanbeimprovedtobe4.9%,whichishigherthanthepreviousreportedresultsusingthesamelengthofnanotube.©2014ElsevierLtd.Allrightsreserved.1.Introductionetal.[13]achievedanefficiencyincreaseof∼27%bymixingTiO2nanotubesandnanoparticlesmechanicallycomparedwithDu
7、ringthelastdecades,dye-sensitizedsolarcells(DSSC)pureTiO2nanotubefilms.Baietal.[14]reportedthatthepowerhaveattractednumerousattentionssincetheinitialreportfromconversionefficiencywasimprovedby26.9%throughembed-Gratzel’sgroupduetoitsadvantagesoflowcost,longlifetimedingZnOnanowiresin
8、toaTiO2nanoparticlefilms.Itisprimarilyand
