Phase Distributions and Local Bandgap Energies in Mixed-Halide Perovskite Nanoparticles

被引：0
|
作者：
Wargulski, Dan R. [1 ]
Binyamin, Tal [2 ]
Coogan, Katrina [3 ,4 ]
Haas, Benedikt [3 ,4 ]
Koch, Christoph [3 ,4 ]
Etgar, Lioz [2 ]
Abou-Ras, Daniel [1 ]
机构：
[1] Helmholtz Zentrum Berlin Mat & Energie, Berlin, Germany
[2] Hebrew Univ Jerusalem, Casali Ctr Appl Chem, Jerusalem, Israel
[3] Humboldt Univ, Dept Phys, Berlin, Germany
[4] Humboldt Univ, IRIS Adlershof, Berlin, Germany
来源：
2023 IEEE 50TH PHOTOVOLTAIC SPECIALISTS CONFERENCE, PVSC | 2023年
关键词：
valence-loss EELS; core-loss EELS; halide perovskites; nanoparticles; monochromated STEM; photovoltaic;
D O I：
10.1109/PVSC48320.2023.10359820
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Monochromated, aberation-corrected scanning transmission electron microscopes enable the investigation of chemical distribution and optical properties such as the bandgap energy. We conducted valence and core electron energy-loss spectroscopy on nanoparticles made of the inorganic doublehalide perovskites CsPb(IxBr1-x)(3) (x=0-1) to investigate the distribution of halogen anions as well as Cs and Pb cations inside the nanoparticles and correlated the results with bandgap energy mappings. Changes of the chemical distribution with continuous electron beam irradiation were observed.
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页数：2
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