Abstract
The emitting wavelength of Mn2+-phosphors is strongly depended by the coordination environment of Mn2+ for the effect of crystal field. This paper reports a new phosphor Cs2Zn3(P2O7)2:Mn2+ with a broad emitting band from 490 to 700 nm for the three different luminescence centers of Mn2+. The emission band at 10 K can be splitted into three Gaussian peaks at 511, 582 and 662 nm, corresponding to the Mn2+ in Zn2+ sites, Mn2+ in Cs+ site and Mn2+-Mn2+ dimers, respectively. Moreover, the temperature-cycling measurements were measured to study the thermostability. The results show that 53 % of the luminescent intensity is retained at 175 °C compared to 30 °C. We think that the Cs2Zn3(P2O7)2:Mn2+ phosphor has potential applications in LED lamp field.
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