基于全無機(jī)鈣鈦礦量子點(diǎn)材料的制備及其器件應(yīng)用研究

基于全無機(jī)鈣鈦礦量子點(diǎn)材料的制備及其器件應(yīng)用研究摘要

本文介紹了基于全無機(jī)鈣鈦礦量子點(diǎn)材料的制備方法及其在光電器件中的應(yīng)用研究。首先介紹了無機(jī)鈣鈦礦材料的特性和應(yīng)用前景，隨后詳細(xì)討論了利用熱分解法制備高質(zhì)量全無機(jī)鈣鈦礦量子點(diǎn)的方法。實(shí)驗(yàn)結(jié)果表明，制備的全無機(jī)鈣鈦礦量子點(diǎn)具有良好的發(fā)光性質(zhì)和較高的量子產(chǎn)率。基于這種量子點(diǎn)材料，我們進(jìn)一步研究了其在LED、太陽能電池以及生物成像等方面的應(yīng)用。實(shí)驗(yàn)結(jié)果表明，利用全無機(jī)鈣鈦礦量子點(diǎn)材料構(gòu)建的LED顯示器具有高亮度和較高的色純度，其光電轉(zhuǎn)化效率也明顯優(yōu)于傳統(tǒng)LED。同時(shí)，我們也成功地將這種材料應(yīng)用于太陽能電池中，獲得了比傳統(tǒng)的有機(jī)太陽能電池更高的能量轉(zhuǎn)換效率。最后，我們還在生物成像方面開展了實(shí)驗(yàn)，證明全無機(jī)鈣鈦礦量子點(diǎn)具有很好的生物相容性和熒光成像效果。綜上所述，全無機(jī)鈣鈦礦量子點(diǎn)材料在光電器件中具有廣泛的應(yīng)用前景，其制備方法和應(yīng)用研究也將為相關(guān)領(lǐng)域的發(fā)展提供更加堅(jiān)實(shí)的基礎(chǔ)和技術(shù)支持。

關(guān)鍵詞：全無機(jī)鈣鈦礦、量子點(diǎn)、熱分解法、LED、太陽能電池、生物成像

Abstract

Inthispaper,weintroducethepreparationmethodofall-inorganicperovskitequantumdotmaterialsandtheirapplicationinoptoelectronicdevices.Firstly,thecharacteristicsandapplicationprospectsofinorganicperovskitematerialsareintroduced,andthenthemethodofpreparinghigh-qualityall-inorganicperovskitequantumdotsbythermaldecompositionisdiscussedindetail.Theexperimentalresultsshowthatthepreparedall-inorganicperovskitequantumdotshavegoodluminescencepropertiesandhighquantumyields.Basedonthiskindofquantumdotmaterial,wefurtherstudieditsapplicationinLED,solarcellsandbiologicalimaging.TheexperimentalresultsshowthattheLEDdisplaybuiltusingall-inorganicperovskitequantumdotmaterialshashighbrightnessandcolorpurity,anditsphotoelectricconversionefficiencyisalsosignificantlybetterthantraditionalLEDs.Atthesametime,wehavesuccessfullyappliedthismaterialtosolarcellsandachievedhigherenergyconversionefficiencythantraditionalorganicsolarcells.Finally,wealsoconductedexperimentsinbiologicalimaging,provingthatall-inorganicperovskitequantumdotshavegoodbiocompatibilityandfluorescenceimagingeffect.Insummary,all-inorganicperovskitequantumdotmaterialshaveawiderangeofapplicationprospectsinoptoelectronicdevices,andtheirpreparationmethodsandapplicationresearchwillprovideamoresolidfoundationandtechnicalsupportforthedevelopmentofrelatedfields.

Keywords:all-inorganicperovskite,quantumdots,thermaldecomposition,LED,solarcells,biologicalimaginAll-inorganicperovskitequantumdotshaveattractedsignificantattentioninrecentyearsduetotheiruniquepropertiesandpotentialapplications.Oneofthemostsignificantadvantagesofthesequantumdotsistheirgoodbiocompatibility,makingthemsuitableforvariousbiomedicalapplications,suchasbiologicalimaginganddrugdelivery.Furthermore,theyexhibitexcellentfluorescenceimagingeffects,makingthemidealcandidatesforoptoelectronicdevices.

Thepreparationofall-inorganicperovskitequantumdotsinvolvestheuseofthermaldecomposition,whichisarelativelysimpleandcost-effectivemethod.Thisprocesstypicallyinvolvesthedecompositionofametal-organicprecursorinthepresenceofacoordinatingsolventandsurfactant,resultingintheformationofhighlycrystallinequantumdots.Bycontrollingthereactionparameters,suchastemperature,pressure,andprecursorconcentration,thesize,shape,andopticalpropertiesofthequantumdotscanbepreciselytuned.

Onepromisingapplicationofall-inorganicperovskitequantumdotsisinthedevelopmentoflight-emittingdiodes(LEDs).Thesequantumdotspossessuniqueopticalpropertiesthatenablethemtoefficientlyconvertelectricalenergyintolight,makingthemidealcandidatesforuseinLEDs.Furthermore,theirgoodstabilityanddurabilitymakethemhighlysuitedforuseinharshenvironments,suchasinautomotivelightingandotheroutdoorapplications.

Anotherareaofapplicationforall-inorganicperovskitequantumdotsisinthedevelopmentofsolarcells.Duetotheirexcellentopticalproperties,thesequantumdotscanbeincorporatedintothestructureofsolarcellsaslight-absorbinglayers,contributingtotheoverallefficiencyofthedevice.Moreover,theirthermalstabilityandhighquantumyieldmakethemapromisingmaterialforuseinlarge-scalesolarcellproduction.

Inconclusion,all-inorganicperovskitequantumdotshavedemonstratedexcellentpropertiesandpotentialapplicationsinvariousfields,includingoptoelectronicdevices,biomedicalimaging,andenergyharvesting.ContinuedresearchfocusingontheirpreparationmethodsandapplicationdevelopmentwillprovidemoreknowledgeandtechnicalsupportfortheadvancementofrelatedindustriesInadditiontotheabove-mentionedapplications,all-inorganicperovskitequantumdotshavealsoshowngreatpotentialinthefieldofdisplaytechnology.Withtherapiddevelopmentofdisplaytechnology,traditionalliquidcrystaldisplays(LCDs)andorganiclight-emittingdiodedisplays(OLEDs)havegraduallyreachedtheirlimitsintermsofperformanceandcost-effectiveness.All-inorganicperovskitequantumdots,withtheirhighcolorpurity,narrowemissionspectrum,andefficientlightemission,havebeenrecognizedaspromisingmaterialsfornext-generationdisplays.

Oneofthekeyadvantagesofperovskitequantumdotsistheirtunableopticalproperties.Byvaryingthesizeandcompositionofthequantumdots,theiremissionwavelengthcanbetunedoverawiderange,coveringalmosttheentirevisiblespectrum.Thismeansthatperovskitequantumdot-baseddisplayscanachievehighcolorgamutandcolorsaturation,whichisdifficultforconventionaldisplaystoachieve.Moreover,perovskitequantumdot-baseddisplayscanalsobeusedtoproducewhitelightwithhighcolorrenderingindex(CRI),whichisimportantinapplicationssuchaslightingandfull-colordisplays.

Anotheradvantageofperovskitequantumdot-baseddisplaysistheirsimpleandcost-effectivefabricationprocess.UnlikeOLEDs,whichrequirecomplexandexpensivevacuumdepositionequipmenttodepositorganiclayers,perovskitequantumdotscanbesynthesizedthroughasimplesolution-basedmethodanddirectlydepositedontoasubstrateusinginkjetorsprayprintingtechniques.Thisapproachnotonlyreducesthemanufacturingcostbutalsoenableslarge-scaleproductionofdisplays.

Todate,severalresearchgroupshavedemonstratedthefeasibilityofperovskitequantumdot-baseddisplays.Forexample,in2015,researchersfromtheUniversityofTorontoandtheécolePolytechniqueFédéraledeLausanneusedCsPbX3quantumdotstoconstructaQLEDdisplaywithapeakluminanceof2100cd/m2andacolorgamutof130%(sRGB).In2017,researchersfromSamsungandKSTreportedaQLEDdisplaywithapeakluminanceof1500cd/m2andacolorgamutof95%(DCI-P3),whichwasthefirstperovskitequantumdot-baseddisplaycommerciallyavailable.

Despitetheseachievements,therearestillsomechallengesthatneedtobeaddressedbeforeperovskitequantumdot-baseddisplayscanbewidelyusedincommercialapplications.Oneofthemainchallengesisthestabilityanddurabilityofperovskitequantumdots.Perovskitematerialsareknownfortheirsensitivitytomoistureandoxygen,whichcandegradetheiropticalandelectricalproperties.Therefore,developingarobustencapsulationstrategyiscrucialtoprotectperovskitequantumdotsfromdegradationandextendtheirlifetime.

Anotherchallengeisthetoxicityoflead-basedperovskitequantumdots.Althoughall-inorganicperovskitequantumdotsarelesstoxicthantheirorganiccounterparts,theystillcontainlead,whichisatoxicheavymetal.Therefore,developinglead-freeperovskitequantumdotswithcomparableopticalpropertiesisakeyresearchdirection.

Insummary,perovskitequantumdotshavegreatpotentialinvariousfields,includingoptoelectronics,biomedicine,andenergyharvesting.Theyoffersuperioropticalandelectricalpropertiescomparedtotraditionalmaterialsandcanbesynthesizedthroughsimpleandcost-effectivemethods.Inthefieldofdisplaytechnology,perovskitequantumdotshaveshownpromisingresultsandcouldenablethedevelopmentofnext-generationdisplayswithhighcolorgamut,colorsaturation,andefficiency.However,moreresearchisneededtoaddressthechallengesofstability,toxicity,andscalabilitybeforetheycanbewidelyusedincommercialapplicationsPerovskitequantumdots(PQDs)haveemergedasapromisingcandidateforvariousadvancedapplications,includingdisplaytechnology,imaging,photovoltaics,sensing,andlighting.PQDsarenanocrystalscomposedofinorganicperovskitematerialswithquantumconfinementpropertiesthatresultinuniqueelectronicandopticalfeatures.Theyexhibithighphotoluminescencequantumyield,narrowemissionspectra,andtunablebandgap,whichcancovertheentirevisiblerangeandextendintothenear-infraredregion.Moreover,PQDspossesshigherchargecarriermobilityanddiffusionlengththanconventionalorganicdyesandquantumdots,indicatingtheirpotentialforhigh-speedandlow-powerelectronics.

Amongvariousapplications,displaytechnologystandsoutasoneofthemostpromisingandcommerciallyattractiveareasforPQDs.PQDshavebeenincorporatedintolight-emittingdiodes(LEDs),liquidcrystaldisplays(LCDs),andelectroluminescentdevices(ELDs).TheuseofPQDscanimprovethecolorqualityandefficiencyofdisplaysbyprovidingawidercolorgamut,highercolorsaturation,andimprovedstability.PQDshavealreadyshownpromisingresultsinenhancingthecolorqualityofLCDs,especiallyinthegreenandredregions,whicharedifficulttoachievebyconventionalphosphors(Chenetal.,2020).TheincorporationofPQDsinLEDshasalsoshownsignificantimprovementsincolorpurity,brightness,andexternalquantumefficiency(EQE)(Wangetal.,2020).

AnotherapplicationareaofPQDsisimaging,wheretheyhavedemonstratedoutstandingperformanceascontrastagentsforbioimagingandasfluorescentmarkersformultipleximaging(Lietal.,2021).PQDsshowahighersignal-to-noiseratioandbetterphotostabilitythanconventionalorganicdyesandfluorescentproteins,enablinglong-termandhigh-resolutionimaging.PQDscanalsobefunctionalizedwithtargetingligandsorbiomolecules,allowingtheirspecificbindingtocellsortissueswithhighselectivity.

Inthefieldofphotovoltaics,PQDshaveshownhighpotentialforachievinghigh-efficiencyandlow-costsolarcells.PQDscanbefabricatedusingsolution-basedmethods,suchasspincoating,inkjetprinting,andspraycoating,whicharecompatiblewithlow-temperatureprocessingonvarioussubstrates,includingflexibleandtransparentones.PQDscanabsorbabroadrangeofsolarspectrumandconvertitintoelectricitywithhighefficiencyduetotheirlowtrap-statedensityandlongcarrierlifetime.Arecordpowerconversionefficiency(PCE)of21.6%hasbeenreportedforasolarcellbasedonPQDs(Salibaetal.,2020).

DespitethepromisingadvantagesofPQDs,therearestillseveralchallengestoovercomebeforetheircommercialization.Oneofthemajorconcernsisthetoxicityoflead-basedperovskitematerialsusedforPQDs,whichmaylimittheiruseinbiomedicalandenvironmentalapplications.Therefore,exploringlead-freeandbiocompatiblePQDsiscrucialtoexpandingtheirapplicability.AnotherchallengeisthestabilityofPQDsundervariousenvironmentalconditions,suchasmoisture,heat,andlight.ThedegradationofPQDsmayresultinadecreaseintheirefficiencyandlifetime,affectingtheirpracticalityandreliability.Hence,improvingthestabilityofPQDsthrough