1、Nanoparticle-polymer photovoltaic cells报告人： 张慧 陈小强 张科举IntroductionConventional solar cells the efficiency is high(24%)expensive inorganic materials(Si)energy intensive processing techniques Nanoparticle-polymer photovoltaic(PV) cellsinexpensive, easily processablefunctionality can be tailored by mol
2、ecular desigen and chemical synthesisgood PCE(31%,10%)organic nanoparticle-polymer PV cells hybrid inorganic nanoparticle-polymer PV cells two typesGeneral principleemavPPCEExternal quantum efficiency(EQE)cctrdissdiffAEQE The PCE for a cells generally increases with the EQE. A high EQE dose not nece
3、ssarily guarantee a high PCE Dispersetion semiconducting nanoparticle within the polymer phase to give bulk heterojunction(BHJ)(b),the average polymer phase domain size is less than Lex and the much greater area of the acceptor/donor interface.External quantum efficiency(EQE)Nanoparticle used in the
4、 photoactive layer A key part of the assemble of nanoparticle-polymer PV cells is formation of a photoactive layer using nanoparticles dispersed in a polymer solution. Organic nanoparticles commonly used in nanoparticle-polymer PV cells are PCBM,PC71BM and SWNT.Polymersused in the photoactive layer
5、The photoactive layers for the PCBM-P3HT PV cells give thhe higtest PCE values.Fabrication of P3HT/PCBMCORE material exists as rigid rodNot possible for ElectrospinningPEO addedIncreases the viscosity and spinnabilityP3HTSHELL materialP3HT(Mn=45 00065 000)PCBMchloroform/toluene (3.5/1 wt.-%)PVP 10 w
6、t.-% ( Mn=1 300 000)chloroform/ethanol (1/1 wt.-%)*Fabrication of P3HT/PCBM solar cloth by electrospinning technique, Subramanian Sundarrajan, Materials LettersSchematic diagram of core-shell electrospinningDC voltage at 18 KV;P3HT/PCBM flow rate is 1.3 mL/h; PVP flow rate is 0.8 mL/h;Room temperatu
7、re with relative humidity of 5060 %.参数参数Structural CharacterizationLength：several mDiameters:0.90 1.5 m1.2 m average Contrast Difference showsthe Core and the ShellGeneral morphology by SEMCoreShell geometry by TEMStructural Characterization(去PVP)PVP材料材料P3HT-PCBM-PVP（洗前）（洗前）P3HT-PCBM（洗后）（洗后）P3HT/PCB
8、M/PVP composite soak in ethanol (anhydrous ethanol，20 min)Diameters reduced to 0.940.18 mPVP中1663 cm1的C=O吸收峰的消失表明PVP材料的完全蚀尽Result and applyPower Conversion Efficiency is 8.7108a) Processed under ambient conditionsb) 织物厚度5m 电荷载体扩散程(nm级)JscV of the P3HT/PCBM Solar Cloth(1 Sun, 1.5G)Jsc: 3.2106 mA/cm2V
9、oc: 0.12 VFF: 22.1 Improvements Potential applications in portable devicesReferences1 Brian R. Saunders,Michael L. Turner. Nanoparticle-polymers photovoltaic cellsJ. Advances in Colloid and Interface Science 138(2008) 1-23.2 Serap Gunes,Niyazi Serdar Sariciftci. Hybeid solar cellsJ. Inorganic Chimic
10、a Acat 361(2008)581-588.3 Subramanian Sundarrajan, et al.Fabrication of P3HT/PCBM solar coth by electrospinning techniqueJ. Materials Letters 64(2010) 2369-2372.4 Electrospinning: A Fascinating Method for the Preparation of Ultrathin Fibers, A. Greiner et al, Nanotech5 Flexible solar cells for clothing, Markus B. Schubert* and Jrgen H. Werner, Application FeatureThank you
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