Room-temperature fabrication of graphene films on variable substrates and its use as.doc

Room-temperaturefabricationofgraphenefilmsonvariablesubstratesanditsuseascounterelectrodesfordye-sensitizedsolarcellsLiWan,ShiminWang*,XianbaoWang,BinhaiDong,ZuxunXu,XiuhuaZhang,BingYang,SiminPeng,JingchaoWang,ChunhuiXuKeyLaboratoryfortheGreenPreparationandApplicationofFunctionalMaterials,MinistryofEducation,FacultyofMaterialsScienceandEngineering,HubeiUniversity,Wuhan430062,PRChinaarticleinfoArticlehistory:epted3December2010Availableonline10December2010Keywords:SolarcellsGrapheneCounterelectrodesCarbonmaterialabstractGraphenefilmswithcontrollablethicknesses,electricalandopticalpropertiesarefabricatedonvariablesubstratesatroomtemperaturebyasimple,efficientandlow-costsolution-(erephthalate,PET,fluorine-dopedtinoxide(FTOconductiveglasses,,asanalternativetoubiquitouslyemployedplatinum-basedcounterelectrodes(CEsfordye-sensitizedsolarcells(DSSCs,.Ó[1],anewcarbonmaterialwithaone-atom-thickandtwo-blatticestructure,hastriggeredenormousinterestindeviceapplications[2e5].Graphenehashighelectronmobility,highthermalstability,andoptimalmechanicalproperties[6e8].-,severalstudiesinvolvedinfabricatinggrapheneonsubstratesfordevicesconstructionhavebeenreported[9e14].However,(CVDneedshightemperature(1000C,whichisonlyavailableforsiliconwafersandfire-resistantmetalsubstrates,andthefollowingtransferringofthefilmstoothersubstratesisatediousprocedure[10].Asgrapheneoxide(GOcanformstabledispersioninwater,essfullyassemb