二維SnS2和MoS2的可控合成及其光電性能研究

二維SnS2和MoS2的可控合成及其光電性能研究二維SnS2和MoS2的可控合成及其光電性能研究

摘要：

二維過渡族金屬二硫化物（TMDs）是一種具有出色的光電性能的新型材料，具有廣泛的潛在應(yīng)用，如光電子學(xué)、催化劑等領(lǐng)域。本文以SnS2和MoS2為研究對(duì)象，采用化學(xué)氣相沉積、水熱合成等方法，在石英基板上可控合成了二維SnS2和MoS2。通過掃描電子顯微鏡（SEM）、透射電子顯微鏡（TEM）、X射線衍射（XRD）等表征技術(shù)研究了TMDs晶體結(jié)構(gòu)、形貌及組合情況等方面，結(jié)果表明所合成的TMDs具有較高的結(jié)晶度、分散性和單分子厚度。通過光電性能測(cè)試儀，研究了TMDs的吸收光譜、熒光和光電流等性質(zhì)，發(fā)現(xiàn)二維SnS2和MoS2的光電性能優(yōu)異，具有廣泛的潛在應(yīng)用前景。

關(guān)鍵詞：

過渡族金屬二硫化物、二維材料、可控合成、光電性能、應(yīng)用前景

Abstract:

Two-dimensionaltransitionmetaldichalcogenides(TMDs)haveexcellentoptoelectronicpropertiesandhaveawiderangeofpotentialapplications,suchasoptoelectronics,catalysts,andsoon.Inthispaper,SnS2andMoS2arestudiedasresearchobjects.Thecontrollablesynthesisoftwo-dimensionalSnS2andMoS2onquartzsubstratesisachievedbyusingmethodssuchaschemicalvapordepositionandhydrothermalsynthesis.Thecrystalstructure,morphology,andcompositionofTMDsarestudiedbyscanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM),X-raydiffraction(XRD),andothercharacterizationtechniques.TheresultsshowthatthesynthesizedTMDshavehighcrystallinity,dispersibility,andsingle-moleculethickness.TheoptoelectronicpropertiesofTMDsarestudiedusingaphotodetector,whichshowsthattheoptoelectronicpropertiesoftwo-dimensionalSnS2andMoS2areexcellentwithawiderangeofpotentialapplications.

Keywords:

Transitionmetaldichalcogenides,Two-dimensionalmaterials,Controllablesynthesis,Optoelectronicproperties,PotentialapplicationsTransitionmetaldichalcogenides(TMDs)haveattractedsignificantattentioninrecentyearsastheyrepresentanewclassoftwo-dimensionalmaterialswithuniqueproperties.Thesematerialsarecomposedoftransitionmetalatomssuchasmolybdenumortungsten,whicharesandwichedbetweentwochalcogenatoms,typicallysulfurorselenium.TMDshaveexcellentoptoelectronicproperties,makingthempromisingcandidatesforapplicationsinelectronics,optoelectronics,andphotovoltaics.

ControllablesynthesisofTMDsiscrucialfortheirpracticalapplicationinvariousfields.Severalsynthesismethodshavebeenreported,includingchemicalvapordeposition,solvothermalsynthesis,andhydrothermalsynthesis.However,thesemethodsareoftenassociatedwithhighcost,lowyield,andpoorqualityofthesynthesizedmaterials.Therefore,itisnecessarytodevelopnovelsynthesistechniquesthatensurehigh-qualityTMDswithcontrollableproperties.

Inrecentresearch,anovelsynthesistechniquehasbeenreportedforthecontrollablesynthesisofTMDs.Thismethodinvolvestheuseofanorganicsolvent,oleylamine,asareducingagentandasulfursource.ThesynthesizedTMDshavesingle-moleculethicknessandexhibithighcrystallinityanddispersibility.

TheoptoelectronicpropertiesofTMDswerestudiedusingphotodetectors.Theresultsshowedthattwo-dimensionalSnS2andMoS2exhibitexcellentoptoelectronicproperties,demonstratingtheirpotentialapplicationsinthefieldofoptoelectronics.

Inconclusion,thecontrollablesynthesisofTMDsisessentialfortheirpracticalapplicationinvariousfields.Novelsynthesistechniquesthatensurehigh-qualityTMDswithcontrollablepropertiesarerequired.TheoptoelectronicpropertiesofTMDsmakethempromisingcandidatesforvariousapplications,includingelectronics,optoelectronics,andphotovoltaicsMoreover,theuniquephysicalpropertiesofTMDshavealsomadethempotentialcandidatesforuseincatalysts,energystoragedevices,andsensors.TMDshaveshowngreatpotentialincatalyticreactions,suchasthehydrogenevolutionreaction(HER)andoxygenreductionreaction(ORR),duetotheirexcellentcatalyticactivitiesandstability.Forexample,MoS2hasshownremarkableHERactivity,makingitanattractivecatalystfortheproductionofhydrogenfuel.Inaddition,TMDshavealsobeenexploredaspromisingmaterialsforenergystoragedevices,suchasbatteriesandsupercapacitors.Theirhighcapacityandgoodelectricalconductivityhaveshowngreatpotentialforuseintheseapplications.Finally,TMDshavealsobeendemonstratedtobeeffectivesensorsduetotheirhighsensitivityandselectivity.Forinstance,WS2hasbeenutilizedasabiosensorforthedetectionofcancerantigens.

Inconclusion,theuniquepropertiesofTMDsmakethemattractivematerialsforabroadrangeofapplications.Thedevelopmentofscalablesynthesismethodsandcharacterizationtechniqueshasallowedforthecontrolofthephysicalandchemicalproperties,enablingtheoptimizationoftheirperformanceinvariousapplications.TMDshaveshowngreatpotentialinthefieldsofelectronics,optoelectronics,photovoltaics,catalysis,energystorage,andsensing.ThecontinuedresearchandexplorationofTMDsholdthepromiseofrevolutionizingthetechnologicalandeconomiclandscape,pavingthewayforsustainabledevelopmentandabetterfutureOneofthemajorareasofinterestforTMDsisinelectronicdevices,wheretheyhavedemonstratedexcellentpropertiessuchashighcarriermobility,opticaltransparency,andtunablebandgap.TMDsarecommonlyusedasachannelmaterialinfield-effecttransistors(FETs)duetotheirhighelectronmobility.ByvaryingthethicknessoftheTMDmaterial,onecaneffectivelytunethebandgapandtherebycontrolthedeviceproperties.TMDshavebeenalsoshowntohavepotentialinotherelectronicapplications,suchasmemorydevices,lightemittingdiodes(LEDs),andsensors.

Inoptoelectronicapplications,TMDshavegainedalotofattentionastheycanbeusedasefficientlightabsorbersandemitters.Theiruniqueopticalpropertiesalsomakethemsuitableforuseinphotodetectors,solarcells,andsolar-fuelcells.TMDshavebeenfoundtoexhibithighabsorptioncoefficients,allowingthemtobeusedasefficientlight-harvestingmaterialsinsolarcells.Theyalsoshowhighquantumefficiencyinphotoluminescence,makingthempromisingcandidatesforLEDs.

TMDshavealsobeenexploredascatalystsinvariouschemicalreactions,suchasthehydrogenevolutionreaction(HER)andoxygenreductionreaction(ORR).TMDshaveshownremarkablecatalyticactivityduetotheirlargesurfacearea,highnumbersofactivesites,anduniqueelectronicproperties.Forinstance,TMDs,suchasMoS2,exhibitexcellentelectrocatalyticactivitytowardstheHER,makingthempromisingcandidatesforuseinwatersplittingdevices.

AnotherareawhereTMDsshowgreatpotentialisinenergystorage.TMDshaveahighspecificcapacitanceandcanbeusedaselectrodematerialsinsupercapacitors.Theycanalsobecombinedwithothermaterialstoformhybridenergystoragedevices,suchaslithium-ionbatteries.

Finally,TMDshavealsofoundapplicationsinsensing,wheretheiruniquephysicalandchemicalpropertiescanbeexploitedforthedetectionofdifferentanalytes.TMDshavebeenreportedtoexhibithighsensitivityandselectivitytowardsspecificgases,suchasNO2andH2S.Theyhavealsobeenusedforbiosensingapplicationsduetotheirabilitytobindbiomoleculesandtheirexcellentbiocompatibility.

Inconclusion,TMDsareahighlypromisingclassofmaterialsthatshowgreatpotentialinvariousapplications,includingelectronics,optoelectronics,catalysis,energystorage,andsensing.ThecontinuedresearchanddevelopmentofTMDsholdthepromiseofrevolutionizingthetechnolog