A series of MgYAlSiO:Dy,Eu phosphors were synthesized by the solid-state method. The luminescent properties and crystal structures of the MgYAlSiO:Dy,Eu phosphors were analyzed. The XRD results show that the synthesized MgYAlSiO:Dy,Eu phosphors are of pure phase. MgYAlSiO:Dy can emit blue and yellow light under 367 nm light excitation; when doped with Eu, there is an obvious energy transfer from Dy to Eu, and warm white light can be realized by adjusting the concentrations of Dy and Eu in MgYAlSiO. A warm white LED device was fabricated by combining MgYAlSiO:0.05Dy,0.07Eu and a UV LED chip (370 nm) under a voltage of 3.2 V and current of 5 mA, the characteristics of the white LED being CIE = (0.4071, 0.3944), CCT = 3500 K and CRI = 91.3.
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| http://dx.doi.org/10.1039/d1ra06215h | DOI Listing |
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