共 50 条
Visualizing Phase Segregation in Mixed-Halide Perovskite Single Crystals
被引:99
作者:
Mao, Wenxin
[1
,2
]
Hall, Christopher R.
[2
,3
]
Chesman, Anthony S. R.
[2
,4
,5
]
Forsyth, Craig
[6
]
Cheng, Yi-Bing
[2
,7
]
Duffy, Noel W.
[8
]
Smith, Trevor A.
[2
,3
]
Bach, Udo
[1
,2
,5
]
机构:
[1] Monash Univ, Dept Chem Engn, Clayton, Vic, Australia
[2] Australian Res Council, Ctr Excellence Exciton Sci, Parkville, Vic, Australia
[3] Univ Melbourne, Sch Chem, Parkville, Vic, Australia
[4] CSIRO Mfg, Clayton, Vic, Australia
[5] Melbourne Ctr Nanofabricat, Melbourne, Vic, Australia
[6] Monash Univ, Sch Chem, Clayton, Vic, Australia
[7] Monash Univ, Dept Mat & Sci Engn, Clayton, Vic 3800, Australia
[8] CSIRO Energy, Clayton, Vic, Australia
基金:
澳大利亚研究理事会;
关键词:
lifetime;
perovskites;
phase segregation;
photoluminescence;
single crystals;
IODIDE;
MANAGEMENT;
EFFICIENT;
D O I:
10.1002/anie.201810193
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Mixed organolead halide perovskites (MOHPs), CH3NH3Pb(BrxI1-x)(3), have been shown to undergo phase segregation into iodide-rich domains under illumination, which presents a major challenge to their development for photovoltaic and light-emitting devices. Recent work suggested that phase-segregated domains are localized at crystal boundaries, driving investigations into the role of edge structure and the growth of larger crystals with reduced surface area. Herein, a method for growing large (30 x 30 x 1 mu m(3)) monocrystalline MAPb(BrxI1-x)(3) single crystals is presented. The direct visualization of the growth of nanocluster-like I-rich domains throughout the entire crystal revealed that grain boundaries are not required for this transformation. Narrowband fluorescence imaging and time-resolved spectroscopy provided new insight into the nature of the phase-segregated domains and the collective impact on the optoelectronic properties.
引用
收藏
页码:2893 / 2898
页数:6
相关论文
共 50 条