The reported anomalous emission intensity of the 5 D 0 → 7 F 4 transition of Eu 3+ in a molybdate double perovskite

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Journal of Materials Chemistry C, ISSN: 2050-7526, Vol: 3, Issue: 5, Page: 960-963

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Chan, Wai-Lun; Liu, Zhenyu; Lu, Shengbo; Tanner, Peter A.; Wong, Ka-Leung
Royal Society of Chemistry (RSC); Royal Society of Chemistry; The Royal Society of Chemistry
Chemistry; Materials Science
article description
The assigned anomalous upconversion emission intensity of theD→Ftransition of Euin the double perovskite SrCa(WMo)Oco-doped with Ybis shown to be due to a transition metal impurity present in the MoOstarting material. Relevant literature shows that the highest energyD→Ftransition is at a longer wavelength than 685 nm in molybdates. Cases of anomalous intensity of this transition are reviewed. Our 360 nm excited emission spectra of SrCa-EuYbLiMoOshow a very weakD→Ftransition, but on co-doping with Mn a structured band between 640 and 710 nm is observed due to Mn.