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1、Nanoparticle-polymer photovoltaic cells,报告人：张慧 陈小强 张科举,Introduction,Conventional solar cells,the efficiency is high(24%)expensive inorganic materials(Si)energy intensive processing techniques,Nanoparticle-polymer photovoltaic(PV)cells,inexpensive,easily processablefunctionality can be tailored by mo
2、lecular desigen and chemical synthesisgood PCE(31%,10%),organic nanoparticle-polymer PV cells,hybrid inorganic nanoparticle-polymer PV cells,two types,General principle,External quantum efficiency(EQE),The PCE for a cells generally increases with the EQE.A high EQE dose not necessarily guarantee a h
3、igh 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 photoactive layer,
4、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,The photoactive lay
5、ers for the PCBM-P3HT PV cells give thhe higtest PCE values.,Fabrication of P3HT/PCBM,CORE material,exists as rigid rodNot possible for ElectrospinningPEO addedIncreases the viscosity and spinnability,P3HT,SHELL material,P3HT(Mn=45 00065 000),PCBM,chloroform/toluene(3.5/1 wt.-%),PVP 10 wt.-%(Mn=1 30
6、0 000),chloroform/ethanol(1/1 wt.-%),*Fabrication of P3HT/PCBM solar cloth by electrospinning technique,Subramanian Sundarrajan,Materials Letters,Schematic diagram of core-shell electrospinning,DC voltage at 18 KV;P3HT/PCBM flow rate is 1.3 mL/h;PVP flow rate is 0.8 mL/h;Room temperature with relati
7、ve humidity of 5060%.,参数,Structural Characterization,Length：several mDiameters:0.90 1.5 m1.2 m average,Contrast Difference showsthe Core and the Shell,General morphology by SEM,CoreShell geometry by TEM,Structural Characterization(去PVP),P3HT/PCBM/PVP composite soak in ethanol(anhydrous ethanol，20 mi
8、n),Diameters reduced to 0.940.18 m,PVP中1663 cm1的C=O吸收峰的消失表明PVP材料的完全蚀尽,Result and apply,Power 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/cm2Voc:0.12 VFF:22.1,Improvements Potential applications i
9、n portable devices,References,1 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 Chimica Acat 361(2008)581-588.3 Subramanian Sundarrajan,et al.Fabri
10、cation 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 Feature,Thank you,
