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简介：ThispaperstudiesthelightscatteringandadsorptionofnanocrystallineTiO2porousfilmsusedindye-sensitizedsolarcellscomposedofanataseand/orrutileparticlesbyusinganopticalfour-fluxradiativetransfermodel.Theselightpropertiesarediffculttomeasuredirectlyonthefunctioningsolarcellsandtheycannotbecalculatedeasilyfromthefirst-principlecomputationalorquantitativetheoreticalevaluations.Thesesimulationresultsindicatethatthelightscatteringof1-25nmTiO2particlesisnegligible,butitiseffectiveintherangeof80and180nm.Asuitablemixtureofsmallparticles(10nmradius),whichareresultedinalargeeffectivesurface,andoflargerparticles(150nmradius),whichareeffectivelightscatterers,havethepotentialtoenhancesolarabsorptionsignificantly.Therutilecrystalshavealargerrefractiveindexandthusthelightharvestofthemixturesofsuchlargerrutileandrelativelysmallanataseparticlesisimprovedincomparisonwiththatofpureanatasefilms.Thelightabsorptionofthe10μmdouble-layeredfilmsisalsoexamined.Amaximallightabsorptionofdouble-layeredfilmisgottenwhenthethicknessofthefirstlayerof10nm-sizedanataseparticlesiscomparabletothatofthesecondlargerrutilelayer.

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