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"Coffee ring"controlment in spray prepared＞19％efficiency Cs0.19FA0.81PbI2.5Br0.5 perovskite solar cells
文献摘要：
Achieving high-quality perovskite films with uniform morphology and homogeneous crystallinity is chal-lenging owing to the coffee ring effect(CRE)in the spray-coating technologies.In this study,an evaporation/spray-coating two-step deposition method is used to fabricate Cs0.19FA0.81PbI2.5Br0.5 light harvesters for perovskite solar cells(PSCs).Considering the solid-liquid reaction,we establish a reaction-dependent regulating strategy that inhibits CRE successfully and prepare a high-quality per-ovskite layer,wherein the solvent for the FAI/Br solution during the spraying process is changed from iso-propanol to n-butyl alcohol(NBA).The retarded-drying-enhanced spreading of the NBA solution inhibits contact line pinning to suppress the capillary flows and increases the reaction between metal halides(CsI/PbI2)and organic salts(FAI/Br),which result in a reduction in the accumulation of solutes in the periphery effectively inhibiting CRE.Consequently,we obtain a high performance Cs0.19FA0.81PbI2.5Br0.5 PSC with a power conversion efficiency(PCE)of 19.17％.An enlarged perovskite film(10×10 cm2)con-taining 40 sub-cells is prepared.The average PCE of these devices is 18.33±0.56％,proving the reliability of the"coffee ring"regulating strategy.This study provides an effective approach for CRE controlment in spraying technology to achieve high repeatability devices with good performance.
文献关键词：
中图分类号：
[1] 医药、卫生（R） / 基础医学（R3） / 病理学（R36） / 病理过程（R364）
[2] 医药、卫生（R） / 药学（R9） / 药理学（R96） / 实验药理学（R965）
[3] 医药、卫生（R） / 临床医学（R4） / 治疗学（R45） / 生物疗法（R456）
作者姓名：
Xinxin Yu;Jing Li;Yanping Mo;Tianxing Xiang;Zhiliang Ku;Fuzhi Huang;Fei Long;Yong Peng;Yi-Bing Cheng
作者机构：
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,Hubei,China;Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City,Zhongshan 528437,Guangdong,China;College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi,China
文献出处：
能源化学
引用格式：
[1]Xinxin Yu;Jing Li;Yanping Mo;Tianxing Xiang;Zhiliang Ku;Fuzhi Huang;Fei Long;Yong Peng;Yi-Bing Cheng-."Coffee ring"controlment in spray prepared＞19％efficiency Cs0.19FA0.81PbI2.5Br0.5 perovskite solar cells)[J].能源化学,2022(04):201-208
A类：
controlment,19FA0,81PbI2
B类：
Coffee,prepared,efficiency,Cs0,5Br0,perovskite,solar,cells,Achieving,high,quality,films,uniform,morphology,homogeneous,crystallinity,chal,lenging,owing,coffee,CRE,coating,technologies,In,this,study,evaporation,two,step,deposition,method,used,fabricate,light,harvesters,PSCs,Considering,solid,liquid,reaction,establish,dependent,regulating,strategy,that,inhibits,successfully,layer,wherein,solvent,FAI,solution,during,spraying,process,changed,from,iso,propanol,butyl,alcohol,NBA,retarded,drying,enhanced,spreading,contact,line,pinning,suppress,capillary,flows,increases,between,metal,halides,CsI,organic,salts,which,result,reduction,accumulation,solutes,periphery,effectively,inhibiting,Consequently,obtain,performance,power,conversion,PCE,An,enlarged,taining,sub,average,these,devices,proving,reliability,This,provides,approach,technology,achieve,repeatability,good
AB值：
0.540929
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