量子点太阳能电池综述

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1、ViewOnlineChemCommDynamicArticleLinksCitethis:Chem.Commun.,2011,47,9561–9571www.rsc.org/chemcommFEATUREARTICLEQuantumdot-sensitizedsolarcellsincorporatingnanomaterialsZusingYang,Chia-YingChen,PrathikRoyandHuan-TsungChang*Received7thMarch2011,Accepted12thMay2011DOI:1

2、0.1039/c1cc11317hQuantumdot-sensitizedsolarcells(QDSSCs)areinterestingenergydevicesbecauseoftheir(i)impressiveabilitytoharvestsunlightandgeneratemultipleelectron/holepairs,(ii)easeoffabrication,and(iii)lowcost.Thepowerconversionefficiencies(Z)ofmostQDSSCs(typicallyo4%

3、)are,however,lessthanthose(upto12%)ofdye-sensitizedsolarcells,mainlybecauseofnarrowabsorptionrangesandchargerecombinationoccurringattheQD–electrolyteandTiO2–electrolyteinterfaces.TofurtherincreasethevaluesofZofQDSSCs,itwillbenecessarytodevelopnewtypesofworkingelectr

4、odes,sensitizers,counterelectrodesandelectrolytes.ThisFeatureArticledescribesthenanomaterialsthathavebeenusedrecentlyaselectronicconductors,sensitizersandcounterelectrodesinQDSSCs.Thenature,size,morphologyandquantityofthesenanomaterialsallplayimportantrolesaffectingt

5、heefficienciesofelectroninjectionandlightharvesting.Wediscussthebehaviorofseveralimportanttypesofsemiconductornanomaterials(sensitizers,includingCdS,Ag2S,CdSe,CdTe,CdHgTe,InAsandPbS)andnanomaterials(notablyTiO2,ZnOandcarbon-basedspecies)thathavebeendevelopedtoimprovet

6、heelectrontransportefficiencyofQDSSCs.WepointoutthepreparationofnewgenerationsofnanomaterialsforQDSSCsandthetypesofelectrolytes,particularlyiodide/triiodideelectrolytes222+3+(I/I3),polysulfideelectrolytes(S/Sx),andcobaltredoxcouples([Co(o-phen)3/]),thatimprovetheir

7、lifetimes.Withadvancesinnanotechnology,weforeseesignificantimprovementsintheefficiency(Z46%)anddurability(43000h)ofQDSSCs.DownloadedbyTianjinUniversityon16August2011Publishedon03June2011onhttp://pubs.rsc.org

8、doi:10.1039/C1CC11317H(QDs)withtunablebandedges.1–4QDsofferthe

9、advantageous1.Introductionfeaturesofphotostability,highmolarextinctioncoefficients,size-Recentadvancesinnanotechnologyhaveopenedupnewavenues