A broad emission band of phosphor Cs2Zn3(P2O7)2:Mn2+ induced by multi-sites of Mn2+

The emitting wavelength of Mn 2+ -phosphors is strongly depended by the coordination environment of Mn 2+ for the effect of crystal field. This paper reports a new phosphor Cs 2 Zn 3 (P 2 O 7 ) 2 :Mn 2+ with a broad emitting band from 490 to 700 nm for the three different luminescence centers of Mn 2+ . The emission band at 10 K can be splitted into three Gaussian peaks at 511, 582 and 662 nm, corresponding to the Mn 2+ in Zn 2+ sites, Mn 2+ in Cs + site and Mn 2+ -Mn 2+ 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 Cs 2 Zn 3 (P 2 O 7 ) 2 :Mn 2+ phosphor has potential applications in LED lamp field.