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时间:2020-03-26
《大面积全柔性染料敏化太阳能电池光电性能优化.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~E(WuliHuaxueXuebao)NovemberActa.-Chim.Sin.2011,27(11),2577-25822577[Article]、)l,、vW.whxb.pku.edu.cn大面积全柔性染料敏化太阳能电池光电性能优化林逍武明星安江苗青青覃达马廷丽(大连52-大学化工学院精细化工国家重点实验室,辽宁大连l16024)摘要:设计并制作了大面积高效全柔性染料敏化太阳能电池(DSCs).通过引入光散射层或施加机械压力,DSCs的光电转化效率有了大幅度提高.实验室小面积(0.4cmx0.4cm)柔性DSCs的光电转化效率达到5.50%.大面
2、积(2cmx3cm,活性面积为2.7cm)DSCs的光电转化效率从未进行处理的1.52%上升到1.81%和2.50%,分别提高了20.0%和66.7%.5cmx7cm面积的DSCs(活性面积为16.2cm)的光电转化效率在未做任何优化处理的条件下达到了1.6O%(光强40mW·cm).同时,本文对提高光电转化效率的机理进行了深入研究.电化学阻抗测试结果表明,加压法能明显减小电池的内部串联电阻(尺s)及TiO2,染料/电解液界面间的传荷电阻(尺c).扫描电镜结果也显示加压后TiO粒子之问粘结更加紧密,更利于电子在TiO薄膜中的传输及染料的吸附.另外,900h的长期稳定
3、性实验结果表明,制作的柔性DSCs的各项光电性能参数均无明显下降.该实验结果为柔性染料敏化太阳能电池的基础研究和大面积产业化技术研究奠定了基础.关键词:全柔性;太阳能电池:散射层;加压法i稳定性中图分类号:0644OptimizationofthePhotoelectricPerformanceofLarge-ScaleAll·FlexibleDye-SensitizedSolarCellsLINXiaoWUMing—XingANJiangMIAOQing-QingQtNDaMATing—Li(StateKeyLaboratoryofFineChemicals,Sc
4、hoolofChemicalEngineering,DalianUniversityofTechnology,Dalian116024,LiaoningProvince,PR.China)Abstract:HighlyefficientIargescaleflexibledye.sensitizedsolarcells(DSCs)weresuccessfullydesignedandfabricated.Bytheintroductionofalightscatteringlayerorpressure,theDSCeficiencywasgreatlyimprov
5、ed.TheflexibleDSCswithasmallsurfacearea(0.4cmx0.4cm)gaveahighenergyconversionefficiencyof5.50%.TheenergyconversionefficienciesofIargeareaDSCs(2cmx3cm,activeareaof2.7cm)improvedfr0m1.52%l01.81%and2.50%,whichisanincreaseof20.0%and66-7%comparedwiththeDSCspreparedwithoutanytreatment.The5cm
6、x7cmDSCsfactiveareaof16.2cm)withoutanyoptimizationshowedanenergyconversioneficiencyof1.60%underasunlightintensityof40mW·cm.Themechanismfortheimprovementineficiencywasalsostudied.TheresultsofelectrochemicaIimpedancespectroscopy(EIS)demonstratedthatthepressuremethodcansignificantlyreduce
7、theseriesresistance(尺。)andthechargetransferresistance(Rct)intheTiO2/dye/electrolyteinterface.Scanningelectronmicroscopy(SEM)showedthatlheTiO2particleswerefarmorecloselyconnectedafterpressing,whichwashelpfuIforelectrontransportintheTiO2networkaswelIasf0rdyeadsorption.Inaddition,thepho
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