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Solution Growth and Performance Study of Cs 2 AgBiBr 6 Single Crystal
Author(s) -
Su Jing,
Huang Yiqiang,
Chen Han,
Huang Jing
Publication year - 2020
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201900222
Subject(s) - differential thermal analysis , absorption edge , thermogravimetric analysis , crystal (programming language) , materials science , crystallite , analytical chemistry (journal) , single crystal , crystal structure , band gap , lattice constant , thermal decomposition , hydrobromic acid , crystallography , diffraction , chemistry , optics , inorganic chemistry , optoelectronics , physics , organic chemistry , chromatography , computer science , programming language
Cs 2 AgBiBr 6 high purity polycrystalline powders are synthesized by solution method. The millimeter‐sized Cs 2 AgBiBr 6 crystals are obtained by cooling method with hydrobromic acid as solvent. Powder X‐Ray diffraction (XRD) analysis shows that the crystal is of cubic structure and its lattice constant is a = b = c =11.2562 Å. Optical absorption property is tested by ultraviolet‐visible (UV‐Vis) spectrophotometer. The results show that the absorption edge of the Cs 2 AgBiBr 6 crystal is at about 593 nm and the band gap value is 2.12 eV. In addition, the thermogravimetric analysis/differential thermal analysis (TG/DTA) curves of Cs 2 AgBiBr 6 crystal at 20–800 °C are measured. The thermal decomposition mechanism of Cs 2 AgBiBr 6 crystal is analyzed. The results show that Cs2AgBiBr6 crystal with high quality can be prepared by solution method, and it has potential application advantages in the field of photoelectric devices.