Journal of Luminescence ( IF 3.6 ) Pub Date : 2021-07-14 , DOI: 10.1016/j.jlumin.2021.118325 Ravita 1 , A.S. Rao 1
Potassium Zinc Alumino Borosilicate (KZABS) glasses co-doped with Dy3+/Tb3+ ions have been synthesized by employing a sudden melt quenching technique. To check the luminescence behavior, the as prepared glasses were characterized by employing spectroscopic tools like photoluminescence (PL) excitation and emission, temperature dependent PL and PL decay to see the energy transfer between Dy3+ and Tb3+ ions and optimum green emission suitable for photonic applications. The XRD spectra reveals the amorphous nature of the as prepared KZABS glasses. PL spectral features show optimum green emission and confirms energy transfer from Dy3+ to Tb3+ ions. With the help of temperature dependent PL, glasses were found to be thermally stable. The decay profiles recorded show bi-exponential nature and demonstrates the energy transfer that took place from Dy3+ to Tb3+ ions. The Inokuti- Hirayama (I–H) model confirms the interaction involved in energy transfer process as dipole-dipole in nature. The CIE coordinates are found to be shifting gradually towards intense green region with increase in activator concentration (Tb3+) under the optimized sensitizer (Dy3+) concentration. It is also observed that, the CIE coordinates shifting towards intense green region when the as prepared KZABS glasses are excited with suitable excitation wavelengths of both sensitizer and activator. All the studies finally reveal the superiority of Dy3+/Tb3+ co-doped KZABS glasses for their usage in green emitting photonic device applications such as w-LEDs and display devices.
中文翻译:
热稳定 KZABS 玻璃中从 Dy 3+到 Tb 3+离子的有效能量转移,用于强绿光器件应用
已经通过采用突然熔体淬火技术合成了与 Dy 3+ /Tb 3+离子共掺杂的钾锌铝硼硅酸盐 (KZABS) 玻璃。为了检查发光行为,制备的玻璃通过使用光谱工具如光致发光 (PL) 激发和发射、温度相关的 PL 和 PL 衰减来表征,以查看 Dy 3+和 Tb 3+离子之间的能量转移以及适合的最佳绿色发射用于光子应用。XRD 谱揭示了所制备的 KZABS 玻璃的无定形性质。PL 光谱特征显示最佳绿色发射并确认能量从 Dy 3+转移到 Tb 3+离子。在温度相关 PL 的帮助下,发现玻璃是热稳定的。记录的衰减曲线显示出双指数性质,并证明了从 Dy 3+到 Tb 3+离子发生的能量转移。Inokuti-Hirayama (I-H) 模型证实了能量转移过程中涉及的相互作用是自然界中的偶极-偶极。发现在优化的敏化剂 (Dy 3+ ) 下,随着活化剂浓度 (Tb 3+ ) 的增加,CIE 坐标逐渐向浓绿色区域移动) 专注。还观察到,当制备的 KZABS 玻璃被敏化剂和活化剂的合适激发波长激发时,CIE 坐标向强绿色区域移动。所有的研究最终都揭示了 Dy 3+ /Tb 3+共掺杂 KZABS 玻璃在绿色发光光子器件应用(如 w-LED 和显示设备)中的优越性。