Kumar Videsh, Kumari Sheetal, Malik Shristy, Sharma Tripti, Prasad Aman, Rao A S
Department of Applied Physics, Delhi Technological University, New Delhi, 110 042, India.
Department of Physics, Vaish College, Maharishi Dayanand University, Rohtak, 124001, India.
J Fluoresc. 2025 Jan 7. doi: 10.1007/s10895-024-04068-y.
Dy and Eu co-doped borosilicate glasses have been synthesised via melt quench technique. Amorphous behaviour of the sample has been verified by XRD study. FT-IR analysis confirmed the presence of various bonds in the host lattice. Energy band gap values of the co-doped glasses were estimated from the UV-VIS data via Tauc Plot. Excitation spectra were recorded under 575 nm (Dy) and 612 nm (Eu) emission wavelengths of co-doped glasses. Emission spectra of the co-doped glasses under 350 nm and 393 nm showed a significant shift towards increasing red emission with increasing Eu concentrations. Dexter's theory was applied to study the transfer of energy mechanism between Dy and Eu ions. Time decay curves were plotted for the co-doped glasses for 350 nm excitation and 576 nm emission wavelength. CIE coordinate diagram shows a shift towards red region with increasing excitation wavelength from 350 nm to 465 nm. The enhancement of red component with increasing Eu concentrations in the as -prepared borosilicate glasses can be appropriately utilised in various w-LEDs and other optoelectronic devices applications.
通过熔体淬火技术合成了镝（Dy）和铕（Eu）共掺杂的硼硅酸盐玻璃。通过X射线衍射（XRD）研究验证了样品的非晶态行为。傅里叶变换红外光谱（FT-IR）分析证实了主体晶格中存在各种键。通过Tauc图从紫外-可见（UV-VIS）数据估计了共掺杂玻璃的能带隙值。在共掺杂玻璃的575nm（Dy）和612nm（Eu）发射波长下记录了激发光谱。在350nm和393nm激发下，共掺杂玻璃的发射光谱显示随着铕浓度的增加，向红色发射增加有显著的位移。应用德克斯特（Dexter）理论研究了镝离子和铕离子之间的能量转移机制。绘制了共掺杂玻璃在350nm激发和576nm发射波长下的时间衰减曲线。CIE坐标图显示随着激发波长从350nm增加到465nm，向红色区域移动。在制备的硼硅酸盐玻璃中，随着铕浓度的增加红色成分的增强可适用于各种白光发光二极管（w-LED）和其他光电器件应用。
