典型文献
Alkalis-doping of mixed tin-lead perovskites for efficient near-infrared light-emitting diodes
文献摘要：
Substitution of lead (Pb) with tin (Sn) is a very important way to reduce the bandgap of metal halide per-ovskite for applications in solar cells,and near infrared (NIR) light-emitting diodes (LEDs),etc.However,mixed Pb/Sn perovskite becomes very disordered with high trap density when the Sn molar ratio is less than 20％.This limits the applications of mixed Pb/Sn perovskites in optoelectronic devices such as wave-length tunable NIR perovskite LEDs (PeLEDs).In this work,we demonstrate that alkali cations doping can release the microstrain and passivate the traps in mixed Pb/Sn perovskites with Sn molar ratios of less than 20％,leading to higher carrier lifetime and photoluminescence quantum yield (PLQY).The external quantum efficiency (EQE) of Sn0.2Pb0.8-based NIR PeLEDs is dramatically enhanced from 0.1％ to a record value of 9.6％ (emission wavelength:868 nm).This work provides a way of making high quality mixed Pb/Sn optoelectronic devices with small Sn molar ratios.
文献关键词：
中图分类号：
作者姓名：
Huanqin Yu;Wenjing Chen;Zhibin Fang;Liming Ding;Bingqiang Cao;Zhengguo Xiao
作者机构：
Hefei National Laboratory for Physical Science at the Microscale,Department of Physics,Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS),University of Science and Technology of China,Hefei 230026,China;School of Material Science and Engineering,Materials Research Center for Energy and Photoelectrochemical Conversion,University of Jinan,Jinan 250022,China;Center for Excellence in Nanoscience (CAS),Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS),National Center for Nanoscience and Technology,Beijing 100190,China
文献出处：
引用格式：
[1]Huanqin Yu;Wenjing Chen;Zhibin Fang;Liming Ding;Bingqiang Cao;Zhengguo Xiao-.Alkalis-doping of mixed tin-lead perovskites for efficient near-infrared light-emitting diodes)[J].科学通报（英文版）,2022(01):54-60
A类：
Alkalis,microstrain,2Pb0
B类：
doping,mixed,perovskites,efficient,near,infrared,light,emitting,diodes,Substitution,very,important,way,reduce,bandgap,metal,halide,applications,solar,cells,NIR,etc,However,becomes,disordered,density,when,molar,less,than,This,limits,optoelectronic,devices,such,tunable,PeLEDs,In,this,work,demonstrate,that,alkali,can,release,passivate,traps,ratios,leading,higher,carrier,lifetime,photoluminescence,quantum,yield,PLQY,external,efficiency,EQE,Sn0,dramatically,enhanced,from,record,value,emission,wavelength,provides,making,quality,small
AB值：
0.474201
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