典型文献
Effect of dimensional expansion on carrier transport behaviors of the hexagonal Bi-based perovskite crystals
文献摘要：
All-inorganic Cs3Bi2I9(CBI)halide perovskites are sought to be candidate for photoelectrical materials because of their low toxicity and satisfactory stability.Unfortunately,the discrete molecular[Bi2I9]3-clusters limit the charge-transport behaviors.Herein,the defect halide perovskite based on trivalent Bi3+is expanded to Cs3Bi2I6Br3(CBIB).Centimeter-size CBIB single crystal(Φ 15×70 mm3)was grown by the vertical Bridgeman method.The powder X-ray diffraction analysis shows that CBIB has P3 m1 structure with lattice parameters of a=b=8.223 ?,c=10.024 ?,α=β=90° and y=120°.The density functional theory(DFT)calculations demonstrate that the charge density distribution was enhanced after the dimensional expansion.The enhancement of carrier transport ability of(00l)in-plane is characterized before and after dimensional improvement.The obtained CBIB(oo1)exhibited an electron mobility up to 40.03 cm2 V-1 s-1 by time-of-flight(TOF)technique,higher than 26.46 cm2 V-1 s-1 of CBI(001).Furthermore,the X-ray sensitivity increases from 707.81 pC Gy-1 cm-2 for CBI(001)to 3194.59 pC Gy-1 cm-2 for CBIB(001).This research will deepen our understanding of Bi-based perovskite materials and afford more promising strategies for lead-free perovskite optoelectronic devices modification.
文献关键词：
中图分类号：
作者姓名：
Qihao Sun;Bao Xiao;Leilei Ji;Dou Zhao;Jinjin Liu;Wei Zhang;Menghua Zhu;Wanqi Jie;Bin-Bin Zhang;Yadong Xu
作者机构：
State Key Laboratory of Solidification Processing&Key Laboratory of Radiation Detection Materials and Devices,M1IT,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China;College of Chemistry,Nankai University,Tianjin 300071,China;School of Microelectronics,Xidian University,Xi'an 710072,Shaanxi,China
文献出处：
引用格式：
[1]Qihao Sun;Bao Xiao;Leilei Ji;Dou Zhao;Jinjin Liu;Wei Zhang;Menghua Zhu;Wanqi Jie;Bin-Bin Zhang;Yadong Xu-.Effect of dimensional expansion on carrier transport behaviors of the hexagonal Bi-based perovskite crystals)[J].能源化学,2022(03):459-465
A类：
Bi2I9,Bi3+is,Cs3Bi2I6Br3,CBIB,Bridgeman,oo1
B类：
Effect,dimensional,expansion,carrier,transport,behaviors,hexagonal,crystals,All,inorganic,Cs3Bi2I9,halide,perovskites,are,sought,candidate,photoelectrical,materials,because,their,low,toxicity,satisfactory,stability,Unfortunately,discrete,molecular,clusters,limit,charge,Herein,defect,trivalent,expanded,Centimeter,size,single,mm3,was,grown,by,vertical,method,powder,ray,diffraction,analysis,shows,that,has,P3,m1,structure,lattice,parameters,density,functional,theory,DFT,calculations,demonstrate,distribution,enhanced,after,enhancement,00l,plane,characterized,before,improvement,obtained,exhibited,mobility,up,flight,TOF,technique,higher,than,Furthermore,sensitivity,increases,from,pC,Gy,This,research,will,deepen,our,understanding,afford,promising,strategies,lead,free,optoelectronic,devices,modification
AB值：
0.567737
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