用于白光发光二极管的暖白色发光荧光粉MgYAlSiO:Dy,Eu的发光与能量转移
Luminescence and energy transfer of warm white-emitting phosphor MgYAlSiO:Dy,Eu for white LEDs.
作者信息
Zhu Zizhong, Tao Chunjing, Wang Zhijun, Yang Zhiping, Li Panlai
机构信息
College of Physics Science & Technology, Tangshan Normal University Tangshan 063000 China.
College of Physics Science & Technology, Hebei University Baoding 071002 China
出版信息
RSC Adv. 2021 Oct 5;11(52):32707-32716. doi: 10.1039/d1ra06215h. eCollection 2021 Oct 4.
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.
采用固相法合成了一系列MgYAlSiO:Dy,Eu荧光粉。对MgYAlSiO:Dy,Eu荧光粉的发光性能和晶体结构进行了分析。XRD结果表明，合成的MgYAlSiO:Dy,Eu荧光粉为纯相。MgYAlSiO:Dy在367 nm光激发下可发射蓝光和黄光；掺杂Eu后，Dy到Eu存在明显的能量转移，通过调节MgYAlSiO中Dy和Eu的浓度可实现暖白光。将MgYAlSiO:0.05Dy,0.07Eu与紫外LED芯片（370 nm）在3.2 V电压和5 mA电流下组合制备了暖白光LED器件，该白光LED的特性为CIE = (0.4071, 0.3944)，CCT = 3500 K，CRI = 91.3。
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