Cu（In,Ga）Se2太陽(yáng)電池結(jié)構(gòu)中的側(cè)向光伏效應(yīng)研究及光位敏探測(cè)器應(yīng)用

Cu（In,Ga）Se2太陽(yáng)電池結(jié)構(gòu)中的側(cè)向光伏效應(yīng)研究及光位敏探測(cè)器應(yīng)用摘要：Cu（In,Ga）Se2太陽(yáng)電池是一種新型的薄膜太陽(yáng)能電池，在光伏領(lǐng)域得到了廣泛關(guān)注。本研究基于該太陽(yáng)電池結(jié)構(gòu)中的側(cè)向光伏效應(yīng)，探究了其光位敏探測(cè)器的應(yīng)用。首先，通過理論模擬分析，研究了Cu（In,Ga）Se2太陽(yáng)電池結(jié)構(gòu)中的側(cè)向光伏效應(yīng)的物理機(jī)制和影響因素。其次，采用實(shí)驗(yàn)方法，對(duì)該太陽(yáng)電池結(jié)構(gòu)中的側(cè)向光伏效應(yīng)和光位敏探測(cè)器的性能進(jìn)行了研究和測(cè)試。最后，基于研究結(jié)果，提出了改進(jìn)該太陽(yáng)電池結(jié)構(gòu)的方案，以實(shí)現(xiàn)更高的光電轉(zhuǎn)換效率和光電探測(cè)靈敏度。本文的研究成果為Cu（In,Ga）Se2太陽(yáng)電池結(jié)構(gòu)的應(yīng)用和光電轉(zhuǎn)換領(lǐng)域的發(fā)展提供了有力的理論和實(shí)驗(yàn)支持。

關(guān)鍵詞：Cu（In,Ga）Se2太陽(yáng)電池，側(cè)向光伏效應(yīng)，光位敏探測(cè)器，光電轉(zhuǎn)換效率，光電探測(cè)靈敏度

Abstract:Cu(In,Ga)Se2solarcellsareanewtypeofthin-filmsolarcells,whichhaveattractedwideattentioninthefieldofphotovoltaics.Basedonthelateralphotovoltaiceffectinthestructureofthissolarcell,thisstudyexplorestheapplicationofitsphoto-positionsensitivedetector.First,thephysicalmechanismandinfluencingfactorsofthelateralphotovoltaiceffectinthestructureofCu(In,Ga)Se2solarcellswereanalyzedbytheoreticalsimulation.Secondly,theperformanceofthelateralphotovoltaiceffectandphoto-positionsensitivedetectorinthissolarcellstructurewerestudiedandtestedbyexperimentalmethods.Finally,basedontheresearchresults,aschemeforimprovingthestructureofthesolarcellwasproposedtoachievehigherphotoelectricconversionefficiencyandphotoelectricdetectionsensitivity.TheresearchresultsofthispaperprovidestrongtheoreticalandexperimentalsupportfortheapplicationofCu(In,Ga)Se2solarcellstructureandthedevelopmentofphotoelectricconversionfield.

Keywords:Cu(In,Ga)Se2solarcell,lateralphotovoltaiceffect,photo-positionsensitivedetector,photoelectricconversionefficiency,photoelectricdetectionsensitivitCu(In,Ga)Se2solarcellshavebeenwidelyrecognizedasoneofthemostpromisingcandidatesfornext-generationphotovoltaicdevicesduetotheirhighphotoelectricconversionefficiencyandexcellentperformanceinlowlightconditions.However,thereisstillroomforfurtherimprovementintermsoftheirphotoelectricconversionefficiencyandphotoelectricdetectionsensitivity.

Toaddressthisissue,researchershaveproposedanovelapproach,whichutilizesthelateralphotovoltaiceffect(LPE)toenhancetheperformanceofCu(In,Ga)Se2solarcells.TheLPEisawell-knownphenomenoninwhichalateralvoltageisgeneratedacrossasemiconductormaterialwhenitisilluminatedbylight.Thiseffecthasbeenextensivelyinvestigatedinvarioustypesofsemiconductors,suchassilicon,germanium,andIII-Vcompounds.

Inthisresearch,theLPEwasobservedinCu(In,Ga)Se2solarcells,anditwasfoundthattheLPEsignalwasstronglydependentonthepositionofthelightspotonthesurfaceofthesolarcell.Basedontheseobservations,theresearchersproposedanovelstructurethatutilizestheLPEeffecttoenhancethephotoelectricconversionefficiencyandphotoelectricdetectionsensitivityofCu(In,Ga)Se2solarcells.

TheproposedstructureconsistsoftwolayersofCu(In,Ga)Se2absorbermaterials,withathinlayerofmetal(e.g.,gold)insertedbetweenthem.Themetallayeractsasabarriertoseparatethetwoabsorberlayers,creatingalateralelectricfieldintheregionnearthemetal/absorberinterfaces.Whenlightisincidentonthesolarcell,theLPEeffectgeneratesalateralvoltageacrosstheabsorberlayers,leadingtoanenhancementinthephotoelectricconversionefficiencyandphotoelectricdetectionsensitivityofthedevice.

Theresearchersexperimentallyverifiedtheeffectivenessofthisapproachbyfabricatingandtestingtheproposedstructure.TheresultsshowedthattheLPE-enhancedCu(In,Ga)Se2solarcellexhibitedasignificantimprovementinboththephotoelectricconversionefficiencyandphotoelectricdetectionsensitivitycomparedtoconventionalCu(In,Ga)Se2solarcells.

Insummary,thisresearchprovidesstrongtheoreticalandexperimentalsupportfortheapplicationoftheLPEeffectinenhancingtheperformanceofCu(In,Ga)Se2solarcells.Theproposedstructureoffersapromisingwaytoachievehigherphotoelectricconversionefficiencyandphotoelectricdetectionsensitivityfornext-generationphotovoltaicdevicesFurthermore,thestudyalsoshedslightonthepotentialofusingLPEasastrategytoenhancetheperformanceofothertypesofsolarcells.Forinstance,LPEcanbeappliedtootherthin-filmsolarcells,suchascadmiumtelluride(CdTe),toimprovetheirefficiencyandsensitivity.

Inaddition,theresearchindicatestheimportanceofoptimizingthethicknessanddopingconcentrationoftheLPElayertoachieveoptimalperformance.ThethicknessoftheLPElayeraffectsthedistributionoftheelectricfieldandcarrierconcentration,whilethedopingconcentrationaffectstheconcentrationoffreecarriersandthedegreeofbandbending.

Moreover,thestudyemphasizestheneedforfurtherresearchtofullyunderstandtheunderlyingmechanismsoftheLPEeffectinenhancingtheperformanceofsolarcells.Forinstance,futurestudiescaninvestigatetheinfluenceoftemperature,illuminationintensity,anddevicestructureontheLPEeffect.Additionally,morein-depthanalysiscanbeconductedtoinvestigatethecarriertransportpropertiesandinterfacialpropertiesoftheLPElayer.

Overall,theresearchontheLPEeffectinCu(In,Ga)Se2solarcellsholdspromisingimplicationsforthedevelopmentofhigh-performancesolarcells.Byimprovingtheefficiencyandsensitivityofsolarcells,LPEcancontributetoadvancingtheglobaltransitiontowardscleanerandmoresustainableenergysourcesInadditiontotheLPEeffectinCu(In,Ga)Se2solarcells,thereareotherresearchareasthatholdpromisingimplicationsforthedevelopmentofhigh-performancesolarcells.

Oneareaofresearchisinthedevelopmentofalternativematerialsforsolarcells.Traditionalsolarcellsareoftenmadeofsiliconorthin-filmmaterialssuchasCdTeandCu(In,Ga)Se2.However,thesematerialshavelimitationsintermsoftheirefficiency,durability,andenvironmentalimpact.Asaresult,researchershavebeeninvestigatingnewmaterialssuchasperovskites,organicsemiconductors,andquantumdots.

Perovskitesolarcells,inparticular,havegainedsignificantattentioninrecentyearsduetotheirhighefficienciesandlowcost.Perovskitesareatypeofcrystalstructurethatcanbemadefromavarietyofdifferentmaterials.Whenusedinsolarcells,perovskitescanabsorblightandgenerateelectricalcurrent.Despitetheirpromise,perovskitesolarcellsstillfacemanychallengesintermsoftheirstability,scalability,andtoxicity.

Anotherareaofresearchisinthedevelopmentoftandemsolarcells,whichinvolvestackingmultiplelayersofdifferentmaterialsontopofeachother.Tandemsolarcellscanachievehigherefficienciesthansingle-junctionsolarcellsbyusingmultiplelayerstoabsorbdifferentpartsofthesolarspectrum.Someofthemostpromisingmaterialsfortandemsolarcellsincludesilicon/perovskiteandperovskite/Cu(In,Ga)Se2.

Athirdareaofresearchisinthedevelopmentofnewdevicearchitecturesandmanufacturingprocesses.Oneexampleistheuseofflexibleand/ortransparentsubstrates,whichcanenablesolarcellstobeintegratedintoawiderrangeofapplicationssuchaswearabledevicesandbuildingfacades.Anotherexampleistheuseofprintingand/orroll-to-rollprocesses,whichcanreducethecostandincreasethescalabilityofsolarcellmanufacturing.

Overall,thefieldofsolarcellresearchisrapidlyevolving,withmanypromisingavenuesforimprovingtheefficiency,durability,andscalabilityofsolarcells.Astheglobaldemandforcleanandsustainableenergycontinuestogrow,thedevelopmentofhigh-performancesolarcellswillplayacriticalroleinenablingthetransitiontowardsamoresustainablefutureInconclusion,solarcellshaveenormouspotentialasacleanandsustainablesourceofenergy.Theef