Design, synthesis and luminescence properties of Ba 2 YB 2 O 6 Cl‐ and Ba 2 YB 2 O 6 F‐based phosphors

Using a high‐temperature solid‐state reaction, the chlorine in Ba 2 YB 2 O 6 Cl is gradually replaced by F, and a new compound with the nominal chemical formula Ba 2 YB 2 O 6 F and two phosphors doped with Ce 3+ and Eu 3+ , respectively, are obtained. X‐Ray diffraction and photoluminescence spectroscopy are used to characterize the as‐synthesized samples. The as‐synthesized Ba 2 YB 2 O 6 Cl exhibits bright blue emission in the spectral range ~ 330–410 nm with a maximum around 363 nm under X‐ray or UV excitation. Ba 2 YB 2 O 6 F:0.01Ce 3+ exhibits blue emission in the range ~ 340–570 nm with a maximum around 383 nm. Ba 2 YB 2 O 6 F:0.01Eu 3+ exhibits a predominantly 5 D 0 – 7  F 2 emission (~610 nm) and the relative intensities of the 5 D 0 – 7  F 0,1,2 emissions are tunable under different wavelength UV excitation. The luminescence behaviors of the two phosphors are explained simply in terms of the host composition and site occupancy probability of Ce 3+ and Eu 3+ , respectively. The results indicate that these phosphors have potential application as a blue phosphor or as a red phosphor. Copyright © 2014 John Wiley & Sons, Ltd.