Intermediate phase assisted sequential deposition of reverse-graded quasi-2D alternating cation perovskites for MA-free perovskite solar cells
作者机构：School of Materials Science and EngineeringNational Engineering Research Center for Domestic&Building CeramicsJingdezhen Ceramic UniversityJingdezhenthe People Republic of China School of Physics and TechnologyInstitute of Technological SciencesKey Laboratory of Artificial Micro/Nano StructuresMinistry of EducationWuhan UniversityWuhanthe People Republic of China Institute for Interdisciplinary Research(IIR)Key Laboratory of Optoelectronic Chemical Materials and DevicesMinistry of EducationJianghan UniversityWuhanthe People Republic of China Beijing Synchrotron Radiation FacilityInstitute of High Energy PhysicsChinese Academy of SciencesBeijingthe People Republic of China College of Polymer Science and EngineeringState Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduthe People Republic of China College of Aerospace Science and EngineeringNational University of Defense TechnologyChangshathe People Republic of China
出 版 物：《InfoMat》 (信息材料（英文）)
年 卷 期：2023年第5卷第3期
页 面：134-149页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by the National Natural Science Foundation of China(Grant/Award Numbers:52262033,51862017,51962015,52162028,and 21603086) the Science and Technology Department of Hubei Province(Grant/Award Number:2019AAA020) The authors also acknowledge the financial support by the Natural Science Foundation of Hunan Province(No.2022JJ40551)
主 题：intermediate phase quantum well distribution quasi-2D perovskite sequential deposition solar cells
摘 要：One-step deposition approaches have been widely applied and developed in the fabrication of quasi-2D ***,the regulation of quantum wells(QWs)and crystalline orientation is difficult and complicated when using this *** deposition is another widespread synthetic approach for preparing perovskite films and perovskite dimension *** this article,δ-CsPbI_(3)intermediate phase assisted sequential(IPAS)deposition is successfully carried out to fabricate MA-free quasi-2D ACI *** amount of theδ-CsPbI_(3)intermediate phase in the PbI2 layer and the concentration of GAI molecule in the IPA solution both play important roles in the production of MA-free quasi-2D ACI perovskite *** n value of the MA-free quasi-2D ACI perovskites can be adjusted,which affects the photovoltaic performance and device *** with one-step deposition,the MA-free quasi-2D ACI perovskites prepared via IPAS deposition have opposite reverse-graded QW distribution and improved vertical orientation,leading to a remarkable PEC of up to 18.86%and allowing the preparation of unpackaged devices with prominent working stability(80%,400 h).The underlying mechanism and crystallization pathway of IPAS deposition confirm that sequential deposition has unique superiority in regulating the QW distribution and crystalline orientation of quasi-2D perovskites.
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