Herein of Tb³⁺ (0.1, 0.2, 0.5, 1, 1.5, 2 and 2.5 mol %) doped Y₄Al₂O₉ (monoclinic phase of yttrium aluminium oxide Y/Al 2:1) phosphor synthesized by conventional modified solid state reaction method (CMSSRM) using inorganic materials like Yttrium Oxide (Y₂O₃), Aluminium Oxide (Al₂O₃) and Terbium Oxide (Tb₂O₃) boric acid using as a flux. The prepared phosphor sample were characterized using X-Ray Diffraction analysis (XRD), Photoluminescence (PL), and Thermoluminescence (TL) glow curve. From the XRD data, using the Scherer’s formula the calculated average crystallite size of Tb³⁺ doped Y₄Al₂O₉ phosphor is around 235 nm. Photoluminescence excitation spectra shows sharp excitation peak centred at 270 nm and broad excitation peak centred at 300 nm it is due to charge transfer band. Here emission spectra shows three distinct peaks centred at 492 nm (⁵D₄ → ⁷F₇), 544 nm (⁵D₄ → ⁷F₆) and 584 nm (⁵D₄ → ⁷F₄). Results indicates that PL intensity increases with increasing the concentration of doping ion i.e. Tb³⁺ up-to 2 mol % after that due to concentration quenching PL intensity decreases. Commission Internationale de l'Éclairage (CIE) values are calculated X = 0.24 and Y = 0.56 it shows intense green emission. TL glow curve were analysed with effect of doping ion concentration and effect of variable UV exposure time. Kinetic parameters are calculated using various methods proposed by Chen and others.

在此，通过常规改性固态合成的Tb ³⁺（0.1、0.2、0.5、1、1.5、2和2.5 mol％）掺杂的Y ₄ Al ₂ O ₉（钇氧化铝Y / Al 2：1的单斜晶相）荧光粉反应方法（CMSSRM）使用无机材料，例如氧化钇（Y ₂ O ₃），氧化铝（Al ₂ O ₃）和氧化Ter（Tb ₂ O ₃）硼酸作为助熔剂。使用X射线衍射分析（XRD），光致发光（PL）和热致发光（TL）辉光曲线对制备的荧光粉样品进行表征。根据XRD数据，使用谢勒公式，计算出的Tb平均晶粒尺寸³⁺掺杂的Y ₄ Al ₂ O ₉荧光粉约为235 nm。光致发光激发光谱显示出中心在270 nm处的尖锐激发峰和中心在300 nm处的宽激发峰，这归因于电荷转移带。在此，发射光谱显示了三个不同的峰，分别位于492 nm（⁵ D ₄ → ⁷ F ₇），544 nm（⁵ D ₄ → ⁷ F ₆）和584 nm（⁵ D ₄ → ⁷ F ₄）处。结果表明，PL强度随掺杂离子（即Tb）浓度的增加而增加此后由于浓度猝灭，³⁺高达2 mol％，PL强度降低。计算得出国际照明委员会（CIE）的值X = 0.24，Y = 0.56，表示强烈的绿色发光。分析了TL辉光曲线，其中掺杂离子浓度的影响和可变的紫外线暴露时间的影响。使用Chen等人提出的各种方法来计算动力学参数。