Journal
CHEMPLUSCHEM
Volume 83, Issue 11, Pages 976-983Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201800400
Keywords
color centers; crystal defects; perovskites; rare earth elements; X-ray photoelectron spectroscopy
Categories
Funding
- National Key Research and Development Program of China [2016YFB0701003]
- National Natural Science Foundation of China [21401184]
- National Basic Research Program of China (973 Program) [2014CB643801]
- Key Program of the Frontier Science of the Chinese Academy of Sciences [YZDY-SSW-JSC018]
- Fund for Creative Research Groups, China [21221061]
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In view of the significant impact of color centers on the physical and chemical properties of materials, studies on the origin of such color centers are needed. In this article, detailed crystal structure analysis and compositional characterization of CeAlO3 was carried out by applying XRD, XPS, HRTEM, STEM-EDS and ICP-OES techniques. The results revealed that crystal defects may be the main cause of color centers. The existence of oxygen and aluminum vacancy was proved and confirmed by the application of XPS, ICP-OES and STEM-EDS characterization methods. Overall, it unlikely that a single crystal defect would generate the yellow-green color of CeAlO3 crystals.
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