光电功能材料.ppt

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1、SolarCells：Operatingprinciples,technologyanddevelopmentSpeaker:ZhuZhenYeDate:2010.6HarbinInstituteofTechnologyShenzhenGraduateSchoolOutlineIntroductiononsolarCellPrinciplesofsolarCellTheFirstGenerationSolarCellTheSecondGenerationSolarCellTheThirdGenerationSolar

2、CellTheFourthGenerationSolarCellSomeResearchTopicIntroductiononsolarcellHistoryofsolarcell1839:PhotovoltaiceffectwasfirstrecognizedbyFrenchphysicistAlexandre-EdmondBecquerel.1883:FirstsolarcellwasbuiltbyCharlesFritts,whocoatedthesemiconductorseleniumwithanextre

3、melythinlayerofgoldtoformthejunctions(1%efficient).1946:RussellOhlpatentedthemodernsolarcell1954:Modernageofsolarpowertechnologyarrives-BellLaboratories,experimentingwithsemiconductors,accidentallyfoundthatsilicondopedwithcertainimpuritieswasverysensitivetoligh

4、t.Thesolarcellorphotovoltaiccellfulfillstwofundamentalfunctions:Photogenerationofchargecarriers(electronsandholes)inalight-absorbingmaterial.SeparationofthechargecarrierstoaconductivecontacttotransmitelectricityIntroductiononsolarcellWhataresolarcellsAdeviceco

5、nvertsphotonenergyintoelectricenergyPVlightLoadCurrentSolarcellsinspacecraftIntroductiononsolarcellWhydoweneedsolarcells?Fossilenergysource(oil,coal)arelimitedEnergyCrisis!!!EnvironmentpollutionApplication:spacecraft,portableandmobilsourceofpower,remotearea,pla

6、ceswithoutaccesstoelectricgrid(Africa)......IntroductiononsolarcellIntroductiononsolarcellGreenhouseeffectandpollutionThetrappingofheatintheatmosphere;incomingshort-wavelengthsolarradiationpenetratestheatmosphere,butthelonger-wavelengthoutgoingradiationisabsorb

7、edbygreenhousegasesandreradiatedbacktoEarth,causingariseintemperaturePollutionSmogcitySolution???IntroductiononsolarcellTheworld’spresentsourcesofenergyDifferentsourcesofenergy:futureIntroductiononsolarcellSolarpowerstationincitiesIntroductiononsolarcellSolarpo

8、werstationinremoteareaIntroductiononsolarcellOtherapplicationsofSolarpowerstationIntroductiononsolarcellFromcelltopowerstation(BasicbuildingblockofPV)Cellconnectedinseries–1