Intense red photoluminescence has been observed in Eu³⁺/Z⁺ (Z⁺ = Li⁺, Na⁺ & K⁺) co-doped CaTiO₃ perovskite phosphor materials, synthesized through high temperature solid-state reaction technique. The phosphor materials are structurally characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. All the compounds are crystalline with the orthorhombic phase. The crystallite and particle size of phosphor increase via incorporation of alkali ions. The vibrational groups in phosphor materials are studied by Fourier transform infrared (FTIR) technique. The diffuse reflectance spectra showed a number of peaks in the UV–visible regions due to different transitions of Eu³⁺ ion. The band gap (E_g) of the phosphor decreases on incorporation of alkali ions. The phosphor materials emit intense red color at 613 nm due to ⁵D₀ → ⁷F₂ transition of Eu³⁺ ion upon 398 nm and 466 nm excitation wavelengths. The intensity of red emission increases upto 12 mol% concentration of Eu³⁺ ions. On incorporation of alkali ions in the 12 mol% Eu³⁺: CaTiO₃ phosphor, the emission intensity increases further due to crystallinity, charge compensation and the asymmetry created around the Eu³⁺ ions in the phosphor. The emission intensity is largest for the 12Eu³⁺/10Na⁺ co-doped CaTiO₃ phosphor. The asymmetric ratio is higher for the 12Eu³⁺/10Na⁺ co-doped CaTiO₃ phosphor. The lifetime of ⁵D₀ level is enhanced via incorporation of alkali ions and it is also larger for the 12Eu³⁺/10Na⁺ co-doped CaTiO₃ phosphor. The CIE color coordinates, correlated color temperature (CCT), color purity and color rendering index (CRI) calculations of the phosphors have also been carried out, which show pure red color in warm light region. Therefore, these synthesized perovskite phosphor materials can be advantageous for display devices, NUV excited red phosphors for making the tricolor phosphor converted WLEDs and blue LED chip-based WLEDs for solid state lighting applications.

在Eu ³⁺ / Z ⁺（Z ⁺  = Li ⁺，Na ⁺＆K ⁺）共掺杂的CaTiO _3中观察到强烈的红色光致发光通过高温固态反应技术合成的钙钛矿荧光粉材料。磷光体材料通过X射线衍射（XRD）和扫描电子显微镜（SEM）技术进行结构表征。所有化合物均为正交晶相结晶。磷光体的微晶和粒径通过引入碱离子而增加。荧光材料中的振动基团通过傅立叶变换红外（FTIR）技术进行了研究。由于Eu ³⁺离子的不同跃迁，漫反射光谱在紫外可见区域显示出许多峰。磷的带隙（E _g）随着碱离子的结合而减小。由于⁵ D ，磷光体材料在613 nm处发出强烈的红色Eu ³⁺离子在398 nm和466 nm激发波长上的₀ → ⁷ F ₂跃迁。红色发射的强度增加到Eu ³⁺离子浓度最高达到12摩尔％。在12mol％的Eu ³⁺：CaTiO ₃荧光粉中引入碱离子时，由于结晶度，电荷补偿和在荧光粉中Eu ³⁺离子周围产生的不对称性，发射强度进一步增加。对于12Eu ³⁺ / 10Na ⁺共掺杂的CaTiO ₃荧光粉，发光强度最大。12Eu ³⁺ / 10Na ⁺的不对称比更高共掺杂的CaTiO ₃荧光粉。⁵ D ₀能级的寿命通过引入碱金属离子得以延长，并且对于12Eu ³⁺ / 10Na ⁺共掺杂的CaTiO ₃荧光粉来说，其寿命也更长。还进行了荧光粉的CIE色坐标，相关色温（CCT），色纯度和显色指数（CRI）计算，在暖光区域显示纯红色。因此，这些合成的钙钛矿磷光体材料对于显示装置，用于制造由三色磷光体转换的WLED和用于固态照明应用的基于蓝光LED芯片的WLED的NUV激发红色磷光体可能是有利的。