太阳能发电峰会资料China-Sunergy中电光伏赵建华博士PPT.ppt

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1、EfficiencyImprovementbySelectiveEmitterSolarCellsDr.JianhuaZhaoViceChairman,PresidentandChiefScientistChinaSunergyNanjing,ChinaTheStructureofSelectiveEmitterCellsMetalgridRearmetalSECellStructureOptimizationofScreenPrintedSolarCellsForemittercontactForlightcollectionEm

2、ittersheetResistanceParameterOptimizationForemittercontactForlightcollectionEmittersheetResistanceCellefficiencyOptimizationofScreenPrintedSolarCellsCellPerformanceCellefficiencyForemittercontactForlightcollectionEmittersheetResistanceCellefficiencySEcellOptimizationCe

3、llPerformanceCellNo.VocIscFFEffic.Pmpp(mV)(A)(%)(%)(W)1625.65.36478.617.72.6372627.35.33478.617.72.6303628.25.33378.717.82.6384625.65.35878.517.72.632Theelectricalperformanceof125mmX125mmmonoc-SiSEcells,asmeasuredbyFraunhoferInstituteofSolarEnergySystems,underSTC1000W/

4、m2,AM1.5globalspectrum,at25C.ElectricalPerformanceofSECellsTheillustrateddiagramiscitedfromthetestingreportofFraunhoferISE.A=148.81cm2Voc=628mVIsc=5.33AFF=78.7%Effic.=17.8%PMPP=2.638WTheAchievementsobtainedfromSECellsExcellentelectricalperformanceofSEcellsTheAchievemen

5、tsobtainedfromSECellsExcellentelectricalperformancesofSEcellsDuetothelightdiffusionontheilluminatedemitterarea,theSECellsdemonstratedveryhigherVocandIscDuetotheheavydiffusiononthemetalcontactarea,theSECellsdemonstratedexcellenthighFFExcellentelectricalperformancesofSEc

6、ellsTheenergyconversionefficienciesofSEcellsarebetween17.0%and18.0%,theaverageefficiencyisaround17.5%.WhentheseSECellswereencapsulatedintomodules,theyproducedpowerashighas185W.SECellshaveveryhighRsh,andverylowreversecurrentdensity.TheAchievementsobtainedfromSECellsVery

7、lowreversecurrentThereversecurrentofcellsmadebyhighqualitywafers(125mm*125mm)wereextremelylow.Mostlythereversecurrentwasintherangeof20mAto30mA.Andevenwhenthewafers’qualityarerelativelypoor,thereversecurrentweremerely100mAto200mA.Excellentperformanceunderlowlighting,low

8、hotspoteffectTheAchievementsobtainedfromSECellsExcellentelectricalperformancesofSEcellsThelowdegradationunderthesunli