High-efficiency near-UV excitable inorganic phosphors with tunable emissions are highly demanded for white light-emitting diodes (LEDs) and displays. In this paper, a series of color-tunable cyan-green-emitting Ca₂Lu_0.99-xZr₂(AlO₄)₃:1%Ce³⁺,xTb³⁺ (CLZA:1%Ce³⁺,xTb³⁺) phosphors was synthesized via a high-temperature solid-state reaction method. Their crystal structure, morphology, emission and excitation spectra, energy transfer properties, CIE color coordinates, internal quantum efficiency and temperature-dependent spectra were systematically researched. Impressively, these CLZA:1%Ce³⁺,xTb³⁺ phosphors showed an intense excitation band in the 370–475 nm wavelength range with a peak at 408 nm corresponding to the 4f→5d transitions of Ce³⁺ ions. Owing to the energy transfer from Ce³⁺ to Tb³⁺ ions, bright cyan-to-green color-tunable emissions were obtained in CLZA:1%Ce³⁺,xTb³⁺ phosphors with an increase of the Tb³⁺ doping concentration, and the corresponding CIE color coordinates changed from (0.156, 0.249) to (0.341, 0.533) when the Tb³⁺ doping concentration increased from x = 0 to 90%. The internal quantum efficiency reached up to 69%. Moreover, temperature-dependent spectra demonstrated good thermal stability and color stability of the as-prepared Ce³⁺/Tb³⁺ doped Ca₂LuZr₂(AlO₄)₃ phosphors. In addition, a white LED device was fabricated by coating the blend of the as-prepared cyan-emitting CLZA:1%Ce³⁺,10%Tb³⁺ phosphor and commercial red phosphor CaAlSiN₃:Eu²⁺ on a 400 nm LED chip, which exhibited bright warm-white light with CIE coordinates of (0.425, 0.376), low correlated color temperature of 2,975 K and high color rendering index value of Ra = 83 and R9 = 89. These results revealed that the CLZA:Ce³⁺,Tb³⁺ phosphors could be excellent candidates for the application of near-UV-excited warm-white LEDs.

对于白色发光二极管（LED）和显示器，对具有可调发射的高效近紫外可激发无机磷光体有很高的要求。本文研究了一系列可发射蓝绿色的可调节颜色的Ca ₂ Lu _{0.99- x} Zr ₂（AlO ₄）₃：1％Ce ³⁺，x Tb ³⁺（CLZA：1％Ce ³⁺，x Tb ³⁺通过高温固态反应方法合成磷光体。系统地研究了它们的晶体结构，形态，发射和激发光谱，能量转移性质，CIE色坐标，内部量子效率和温度相关光谱。令人印象深刻的是，这些CLZA：1％Ce ³⁺和x Tb ³⁺磷光体在370-475 nm波长范围内显示出很强的激发带，在408 nm处的峰对应于Ce ³⁺离子的4 f →5 d跃迁。由于从Ce ³⁺到Tb ³⁺离子的能量转移，在CLZA中获得了明亮的从青色到绿色的可调发射：1％Ce ³⁺，X铽³⁺磷光体与增加了的Tb ³⁺从（0.156，0.249）变化为掺杂浓度，以及相应的CIE颜色坐标（0.341，0.533），当Tb的³⁺的掺杂浓度从增加的X  = 0至90 ％。内部量子效率高达69％。此外，温度依赖性光谱证明了所制备的掺杂Ce ³⁺ / Tb ^3+的Ca ₂ LuZr ₂（AlO ₄）₃荧光粉具有良好的热稳定性和颜色稳定性。另外，通过涂覆制备的发蓝光的CLZA：1％Ce ³⁺的混合物来制造白色LED器件。400 nm LED芯片上的，10％Tb ³⁺荧光粉和商业红色荧光粉CaAlSiN ₃：Eu ²⁺，显示出明亮的暖白光，CIE坐标为（0.425，0.376），低相关色温为2,975 K，并且高显色指数值分别为Ra = 83和R9 =89。这些结果表明，CLZA：Ce ³⁺，Tb ³⁺荧光粉可能是应用近紫外线激发的暖白LED的极佳候选材料。