Nanoparticle-polymerphotovoltaiccells報(bào)告人：張慧

陳小強(qiáng)張科舉IntroductionConventionalsolarcellstheefficiencyishigh(24%)expensiveinorganicmaterials(Si)energyintensiveprocessingtechniques

Nanoparticle-polymerphotovoltaic(PV)cellsinexpensive,easilyprocessablefunctionalitycanbetailoredbymoleculardesigenandchemicalsynthesisgoodPCE(31%,10%)organicnanoparticle-polymerPVcells

hybridinorganicnanoparticle-polymerPVcells

twotypesGeneralprincipleExternalquantumefficiency(EQE)

ThePCEforacellsgenerallyincreaseswiththeEQE.AhighEQEdosenotnecessarilyguaranteeahighPCE

Dispersetionsemiconductingnanoparticlewithinthepolymerphasetogivebulkheterojunction(BHJ)(b),theaveragepolymerphasedomainsizeislessthanLexandthemuchgreaterareaoftheacceptor/donorinterface.Externalquantumefficiency(EQE)Nanoparticle

usedinthephotoactivelayer

Akeypartoftheassembleofnanoparticle-polymerPVcellsisformationofaphotoactivelayerusingnanoparticlesdispersedinapolymersolution.Organicnanoparticlescommonlyusedinnanoparticle-polymerPVcellsarePCBM,PC71BMandSWNT.Polymers

usedinthephotoactivelayer

ThephotoactivelayersforthePCBM-P3HTPVcellsgivethhehigtestPCEvalues.FabricationofP3HT/PCBMCOREmaterial

existsasrigidrodNotpossibleforElectrospinningPEOaddedIncreasestheviscosityandspinnabilityP3HTSHELLmaterialP3HT(Mn=45000–65000)PCBMchloroform/toluene(3.5/1wt.-%)PVP10wt.-%(Mn=1300000)chloroform/ethanol(1/1wt.-%)*FabricationofP3HT/PCBMsolarclothbyelectrospinningtechnique,SubramanianSundarrajan,MaterialsLettersSchematicdiagramofcore-shellelectrospinningDCvoltageat18KV;P3HT/PCBMflowrate

is1.3mL/h;PVPflowrateis0.8mL/h;Roomtemperaturewithrelativehumidityof50–60%.參數(shù)StructuralCharacterization

Length：severalμmDiameters:0.90~1.5μm1.2μmaverageContrastDifferenceshowstheCoreandthe

ShellGeneralmorphologybySEMCore–ShellgeometrybyTEMStructuralCharacterization(去PVP)PVP材料P3HT-PCBM-PVP（洗前）P3HT-PCBM（洗后）P3HT/PCBM/PVPcompositesoakinethanol

(anhydrousethanol，~20min)Diametersreducedto

0.94±0.18μmPVP中1663cm?1的C=O吸收峰的消失表明PVP材料的完全蝕盡ResultandapplyPowerConversionEfficiencyis8.7×10?8a)Processedunderambientconditionsb)織物厚度~5μm>>電荷載體擴(kuò)散程(nm級(jí))Jsc–VoftheP3HT/PCBMSolarCloth(1Sun,1.5G)Jsc:

3.2×10?6mA/cm2Voc:

0.12VFF:

22.1

Improvements→PotentialapplicationsinportabledevicesReferences[1]BrianR.Saunders,MichaelL.Turner.Nanoparticle-polymersphotovoltaiccells[J].AdvancesinColloidandInterfaceScience138(2008)1-23.[2]SerapGunes,NiyaziSerdarSariciftci.Hybeidsolarcells[J].InorganicChimicaAcat361(2008)581-588.[3]SubramanianSundarrajan,etal.FabricationofP3HT/PCBMsolarcothbyelectrospinningtechnique[J].MaterialsLetters64(2010)2369-2372.[4]Electrospinning:AFascinatingMethodforthePrepara