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Novel pure Ca 2 ZnMoO 6 composition with white‐light luminescence
Author(s) -
Peng GuoXiang,
Lin ChiYu,
Yang ChengFu,
Chen ChihCheng,
Chen ChaoYang
Publication year - 2020
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3720
Subject(s) - phosphor , chromaticity , orthorhombic crystal system , luminescence , tetragonal crystal system , materials science , analytical chemistry (journal) , powder diffraction , phase (matter) , phase diagram , crystallography , mineralogy , chemistry , crystal structure , optoelectronics , optics , physics , chromatography , organic chemistry
Phosphors with composition Ca 2 ZnMoO 6 were synthesized at temperatures of 800–1200°C using the solid‐state method. Analysis of X‐ray diffraction patterns of the Ca 2 ZnMoO 6 powders did not reveal a double perovskite structure. When the synthesis temperature was equal to or higher than 800°C, the synthesized Ca 2 ZnMoO 6 powders revealed a tetragonal structure (CaMoO 4 ) rather than an orthorhombic structure (Ca 2 ZnMoO 6 ) and the cubic structure (Sr 2 ZnMoO 6 ) of a double perovskite. The ZnO phase was still observed at a synthesis temperature of 1200°C. The compositions of synthesized Ca 2 ZnMoO 6 powders differed from the prepared powder, and the Ca 2 ZnMoO 6 phosphors exhibited some important novel features. First, synthesized Ca 2 ZnMoO 6 compositions could emit light as a phosphor no activators, called Ca 2 ZnMoO 6 phosphors. Effect of synthesis temperature on luminescence properties of these Ca 2 ZnMoO 6 phosphors was readily observed, and some important novel features and properties were noted. Second, the phosphors presented only one broad characteristic emission peak in the visible light region. Third, measurement of the chromaticity diagram of the Ca 2 ZnMoO 6 phosphors revealed a white‐light source. Through analysis, we determined why the synthesized Ca 2 ZnMoO 6 phosphors had just one broad characteristic emission peak.