基于太陽電池的上轉(zhuǎn)換材料設(shè)計與制備研究

1、河北工業(yè)大學碩士學位論文基于太陽電池的上轉(zhuǎn)換材料設(shè)計與制備研究姓名：雷志芳申請學位級別：碩士專業(yè)：物理電子學指導(dǎo)教師：張存善張曉丹20071001基于太陽電池的上轉(zhuǎn)換材料設(shè)計與制備研究DESIGNFABRICATIONRESEARCHOFUPCONVERSIONPARTICLESBASEDONSOLARCELLSABSTRACTBecauseoftheintrinsiclayerbgaplimitationinsolarcellsfex

2、amplethebgapofaSi:Hisaboutof1.7eVthebgapofcSi:Hcanbechangedbetween1.1eV～1.4eV.Sothesolarcellscanonlyabsbthelightspectrumfromvisibletothenearinfrared.Intheupconversionmaterialsthelowenergyphotoncanbetransfmedtothehighener

3、gyphoton.AlthoughtherearemanyapplicationsofthismaterialinlasersbiomedicinedisplaythefirstapplicationinsolarcellisonlyfromanattempttosiliconsolarcellsofA.Shalavin2005.Consideringthedifficultyofmaterialstructurethereisafew

4、reptrelatedthissubject.Theabsptionwavelengthisabove1100nminsiliconsolarcellswhichisclosedtonearinfraredsothefunctionofupconversionneedbediscussedinfurther.TosiliconthinfilmsolarcellstheabsptionwavelengthofaSi:Hisunder700

5、nmthelongestabsptionwavelengthofcSi:Hisonlyclosetothesiliconsolarcells.Sothesiliconthinfilmsolarcellwithupconversionmaterialsisbetterthansiliconsolarcell.Inthisthesiswedesigntheupconversionmaterialstoadapttothesiliconthi

6、nfilmsolarcell.AgroupofEr3：NaYF4，Yb3：NaYF4，Yb3Er3：NaYF4samplesweresynthesizedusinghydrothermalmethod.TheopticalstructuralpropertiesofthiskindofmaterialwereanalyzedbyTEMSEMXRDSpectrophotometerfluophototmeter.Effectofthedo

7、pingratioofrareearthionstheadditionofEDTAdopingratioofEDTA:Ln3calciningheatwasalsopaidattention.Themainsresultsareinthefollowing:1.Thedopingratioofrareearthionshasnoevidenteffectonthecrystalphaseoftheupconversionmaterial

8、s.FromtheresultsofabsptionspectraitcanbeobtainedthatthebestYb3、Er3codopingratiois18%、2%whichcanabsb9001030nm1450nm1580nmwavelengthsunlightthencanemit540nm653nmsovisiblelight.2.ResultsofSEM，TEMXRDabsptionspectrameasuremen

9、tshowedtheparticlesseparationenhancementofupconversionabsptioncontrollingcrystalgraingrowthphasetransitionofupconversionduetotheadditionofEDTA.ThematerialswiththeadditionofEDTAhaveshownrelativelyhighwideabsptioninthenear