Parthibaraj V, Vijayakumar R, Padhi Ranjib Kumar, Ramachandran K, Maheshvaran K
Department of Physics, Kongu Engineering College, Perundurai, Erode, 638060, India.
Department of Physics, PSNA College of Engineering and Technology, Dindigul, Tamilnadu, 624622, India.
J Fluoresc. 2025 Jun;35(6):4579-4585. doi: 10.1007/s10895-024-03870-y. Epub 2024 Jul 24.
A series of Dy ions doped NaBaBO phosphors with different dopant concentration was synthesized by solid state reaction. The phase purity was checked by X-ray diffraction analysis and the functional groups present in as prepared phosphors was investigated with the help of FTIR spectral analysis. Under 386 nm excitation, the photoluminescence spectra exhibit three emission bands around 482 nm, 574 nm and 664 nm due to F→H (J = 15, 13, 11) transions respectively. The optimum doping concentration of Dy ions was found to be 5 mol%. The color coordinates are estimated from the emission spectra to check the dominant emission color and the color coordinates of the studied phosphors are fall on white region of CIE 1931 diagram. The decay curve analysis was made to determine the lifetime of excited state of Dy ions and the decay curves are exhibited bi-exponential behavior irrespective of Dy ion concentration. All these measurents are done in room temperature and the results obtained from these studies are discussed in detail to claim their usage in light emitting devices.
通过固态反应合成了一系列不同掺杂浓度的镝离子掺杂的硼酸钠钡荧光粉。通过X射线衍射分析检查相纯度，并借助傅里叶变换红外光谱分析研究了所制备荧光粉中存在的官能团。在386nm激发下，光致发光光谱分别由于F→H（J = 15、13、11）跃迁而在482nm、574nm和664nm附近呈现三个发射带。发现镝离子的最佳掺杂浓度为5mol%。从发射光谱估计色坐标以检查主要发射颜色，并且所研究荧光粉的色坐标落在CIE 1931图的白色区域。进行衰减曲线分析以确定镝离子激发态的寿命，并且衰减曲线呈现双指数行为，与镝离子浓度无关。所有这些测量均在室温下进行，并详细讨论了从这些研究中获得的结果，以说明它们在发光器件中的用途。
