基于PbI2掺杂的CsPbBr3太阳能电池设计

摘要随着传统化石能源面临枯竭与环境问题日益加重，可再生能源在全球能源转型中扮演着越来越关键的角色。在各类可再生能源中，太阳能以其清洁、可持续、分布广泛等特点，已成为最具发展潜力的可再生能源形式之一，在全球能源结构中占据越来越重要的地位。在这一背景下，具有高光电转换效率和较低生产成本的钙钛矿太阳能电池被广泛研究，成为了推动太阳能技术革新的重要方向。目前，国内外研究的核心方向集中于提升全无机CsPbBr3钙钛矿太阳能电池（PSC）的光电转换效率和稳定性，以实现更广泛的商业应用。宽带隙CsPbBr3钙钛矿太阳能电池逐渐被视为叠层太阳能电池顶层电池的理想候选材料，但溶液沉积法制备的CsPbBr3薄膜的光电转换效率受到薄膜中缺陷的限制。为解决这一问题，本文采用在溶液沉积法合成的CsPbBr3薄膜中掺入微量PbI2的策略，这一策略有效地增大了CsPbBr3薄膜的晶粒尺寸，降低了其光学带隙和载流子复合几率。同时，成功制备了掺杂PbI2的CsPbBr3钙钛矿太阳能电池，其最佳转换效率为6.46%，高于未掺杂CsPbBr3器件的效率（5.00%）。这项研究提供了一种制造高效全无机钙钛矿太阳能电池的方法。关键词：掺杂PbI2；CsPbBr3；全无机钙钛矿太阳能电池；光学带隙AbstractAstraditionalfossilfuelsfacedepletionandenvironmentalissues,renewableenergyplaysanincreasinglycrucialroleintheglobalenergytransition.Amongvariousrenewableenergysources,solarenergyhasbecomeoneofthemostpromisingformsofrenewableenergyduetoitsclean,sustainable,andwidelydistributedcharacteristics,andoccupiesanincreasinglyimportantpositionintheglobalenergystructure.Inthiscontext,perovskitesolarcellshavebeenwidelystudiedduetotheirhighefficiencyandlowproductioncosts,becominganimportantdirectionforpromotingsolarenergytechnologyinnovation.Atpresent,researchonallinorganicCsPbBr3perovskitesolarcells(PSCs)athomeandabroadmainlyfocusesonimprovingthephotoelectricconversionefficiencyandstabilityofperovskitesolarcellstoachievewidercommercialapplications.CsPbBr3-basedwide-bandgapperovskitephotovoltaicdevicesexhibitconsiderablepotentialastopsubcellcomponentsintandemsolarcellarchitectures,owingtotheirtunableoptoelectronicpropertiesandsuperiorstabilityunderoperationalconditions.However,thedefectsinCsPbBr3filmpreparedbysolutiondepositionmethodrestricttheoptoelectronicperformanceofperovskitesolarcells.Toaddressthisissue,anovelapproachinvolvingtheincorporationofatraceamountofPbI2intoCsPbBr3filmssynthesizedviasolutiondepositionwasimplemented.ThisstrategyeffectivelyenhancesthegrainsizeoftheCsPbBr3filmwhileconcurrentlyreducingitsopticalbandgap,surfacegrainboundarydefects,andcarrierrecombinationprobability.Leveragingthisoptimizeddopedfilm,PbI2-dopedCsPbBr3perovskitesolarcellsweresuccessfullyfabricated.Theresultantdevicesexhibitedapeakpowerconversionefficiencyof6.46%,representinganotableimprovementovertheundopedCsPbBr3counterparts(5.00%).Thisresearchpresentsanapproachtomanufacturinghighlyefficientall-inorganicperovskitesolarcells.ThisresearchpresentsanapproachtoKeywords:DopingPbI2；CsPbBr3；All-InorganicPerovskiteSolarCells；OpticalBandGap参考文献朱美芳.太阳能电池基础与应用[M].北京:科学出版社,2009:29.Liu,J.,He,Y.,Ding,L.,etal.

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