基于硫化铅纳米晶植入的钙钛矿薄膜结晶动力学与光伏性能研究刘晨1，翟计洲2，郭鹏飞1，3，王洪强1，3(1.西北工业大学凝固技术国家重点实验室，陕西西安710072；2.西安地球环境创新研究院，陕西西安710061；3.西北工业大学重庆科创中心，重庆401135)摘要：有机无机杂化钙钛矿太阳能电池的光电转换效率已经得到飞速发展，然而钙钛矿离子的本征不稳定性会诱导其在快速结晶时形成低质量的薄膜，使得钙钛矿器件在环境稳定性方面仍面临巨大挑战。本文基于激光制备的无配体硫化铅纳米晶在钙钛矿晶内的可控植入，创新性地提出构筑晶内异质界面改善钙钛矿薄膜结晶动力学和稳定性的调控策略。结果表明，晶内植入硫化铅纳米晶能够抑制钙钛矿中间相生成，并加快形核速率，减缓钙钛矿长大速率，显著提升了钙钛矿薄膜结晶质量和环境稳定性。基于硫化铅纳米晶晶内植入的钙钛矿太阳能电池最高光电转换效率达到22.12%，且在未封装、40%相对湿度条件下经过5000h仍能保持其初始效率的95%以上，在惰性气氛、85℃下的热稳定性超过1000h。关键词：晶内异质界面；结晶动力学；环境稳定性；光电转换效率；杂化钙钛矿薄膜；硫化铅纳米晶中图分类号：TB34文献标识码：A文章编号：1000-8365(2023)01-0054-08StudyonCrystallizationKineticsandPhotovoltaicPerformanceofPerovskiteFilmswithEmbeddingofPbSNanocrystalsinGrainsLIUChen1,ZHAIJizhou2,GUOPengfei1,3,WANGHongqiang1,3(1.StateKeyLaboratoryofSolidificationProcessing,NorthwesternPolytechnicalUniversity,Xi'an710072,China;2.Xi'anInstituteforInnovativeEarthEnvironmentResearch,Xi'an710061,China;3.InnovationCenterNPUChongqing,Chongqing401135,China)Abstract：Organicandinorganichybridperovskitesolarcellshaveachievedrapiddevelopmentinpowerconversionefficiencybutremainformidablechallengesinenvironmentalstability,owingtotheintrinsicinstabilityofperovskiteionsthatcaninducelowcrystalqualityduringrapidcrystallization.Thepresentworkinnovativelyproposedaregulationstrategyforconstructingheterointerfacesingrainstoimprovethecrystallizationkineticsandenvironmentalstabilityofperovskitefilms.Suchaheterointerfacewasconstructedbycontrollableembeddingoflaser-preparedligand-freePbSnanocrystalsinperovskitegrains.Asaresult,theembeddingofPbSnanocrystalscaninhibitth...
