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1、www.afm-journal.dewww.MaterialsViews.comFULLPAPERCore/ShellPbSe/PbSQDsTiO2HeterojunctionSolarCellLiozEtgar,*DianaYanover,RichardKarelCˇapek,RomanVaxenburg,ZhaoshengXue,BinLiu,MohammadKhajaNazeeruddin,EfratLifshitz,andMichaelGrätzelCore/shellQDsofferthepossibilityofQuasitype-IIPbSe
2、/PbSquantumdots(QDs)areemployedinasolidstateapartialandinternalchargeseparationhighefficiencyQD/TiO2heterojunctionsolarcell.TheQDsaredepositedandabetterchemicalstability.Intype-IQDs,awide-gapsemiconductorcoatsausinglayer-by-layerdepositiononahalf-micrometer-thickanataseTiO2coremade
3、ofanarrower-gapmaterial;innanosheetfilmwith(001)exposedfacets.TheoreticalcalculationsshowthatthiscaseboththeelectronandholeresidethecarriersinPbSe/PbSquasitype-IIQDsaredelocalizedovertheentireinthesamepartoftheheterostructurecore/shellstructure,whichresultsinbetterQDfilmconductivity
4、compared(theQDcore).Intype-IIQDs,thereistoPbSeQDs.Moreover,PbSshellpermitsbetterstabilityandfacileelectronalignmentofenergystatesattheinter-injectionfromtheQDstotheTiOnanosheets.Tocompletetheelectricalfacebetweentwosemiconductors,which2encouragesspatialseparationofelectronscircuit
5、ofthesolarcell,aAufilmisevaporatedasabackcontactontopoftheandholesbetweentworegimes.InquasiQDs.ThisPbSe/PbSQD/TiO2heterojunctionsolarcellproducesalighttotype-II,atleastoneofthecarriersisdelo-electricpowerconversionefficiency(η)of4%withshortcircuitphotocurrentcalizedovertheentirecore
6、/shellstruc-(J)of17.3mA/cm2.Thisreportdemonstrateshighlyefficientcore/shellnearture.[2022]Inparticular,inPbSe/PbSofascinfraredQDsinaQD/TiO2heterojunctionsolarcell.smallsize,bothcarriersaredelocalizedovertheentirecore/shellstructure,duetothesmallpotentialbarrieratthecore/shellinterf
7、ace,however,withdifferentspread1.Introductionofthewavefunctionacrosstheinterface.Thus,slightcarriersseparationisachieved,stilltheoptiontoextractbothcarriersThedevelopmentofquantumdot(QD)basedsolarcellsisawayfromtheexteriorsurfacesoftheQDs.growingfastincludingnanocrystal(NC)-polyme
8、rhybridsolarHere,wereportonsolids
