硅纳米线阵列的制备与光伏应用的分析

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1、———————————————』堕堕一AbstractPhotovoltaictechnologyisoneoftheeffectivewaystOsolvetheener譬y嘶SjsandenVlronmentalpollution。Atpresent，crystallinesiliconsolarcellsremaillthebastsofthecurrentphotovoltaicindustry．However,thehighcostofcrystallinesiltconsolarceJJ8hasg

2、reatlyhinderedthedevelopmentofthephotovoltaicindus魄Siliconnanowires(SiNWs)areconsideredaspromisingmaterialstoacbievehigheffictencⅥJowcOStsolarcells，duetotheirexcellentlightabsorbingpropertiesande伍cientcafTlerseparationperformance．Therefore，theresearchonsili

3、connanowirearravsforpnotoVoltaicapplicationsisverymeaningful．Inthispaper,t11eantirenectionpropertiesofSiNWsarray,solarcellperformance,aswellassu—hceDassivationofSiNWsarrayhasbeenresearched．Theresultsweobtainedareasfoilo、vS：(1)mSiNWsarraycanbecreatedbymetal．

4、assistedchemicaletching(MACE)astheAgnanoparticlesfilmverticallysink．Theleng_tllofSiNWsarrayscanberegulatedbyadjustingtheetchingtime．withetchingtimeforsiliconsubstrates，ThelengthsofSiNWsarmyincreaselinearlySiliconnanowirearrayshasalowreflectance(<1％)overawid

5、erange(300-1000nm)．TheSiNWarraysoflongerlengthhaVeloWerreflectaIlcemourinvestigatedlengthrange．TheSiNWsolarcellexhibitsahigherpowerconversionefficiencyof8．84％thanthecellbasedonpolishedsiliconwafer，underthesameconditionofcompactcontactofthefrontsurfaceelecn．

6、ode．Wef-oundthatthereasonfortheincreaseofcellefficiency,inadditiontotheexcellentantireflectionpropertiesofSiNWsarrays，istheimprovedlong．wavelengthsunlightabsorptionwhichreducestherecombinationofminoritycarrier．(2)ThelengthoftheSiNWsarraysCanbemanipulatedbya

7、djustingtllereactiontime·FlaereflectancedecreaseswiththeSiNWs’lengthincreasing．Bvcombiningthermaloxidationandhydrofluoricacidtreatment，wecanmaIliDulatetllefillingratioofSiNWs．WiththeSiNWs’fillingratiodecreasing，therefleclancedecreasesatfirst，andthenincrease

8、s．Si／Si02coaxialnanowiresarraycanbeobtainedbythermaloxidationofas-grownSiNWsarray．Theresultsshowmat廿1esilicondioxideshellCannotonlyfurtherreducethereflectanceofSiNWsarray,butalsopasslVatesurfacestateso