Praveenkumar Nakka, Madhuri K V, Krishna Reddy D V, Rami Reddy M
Thin Film Research Center, Department of Physics, Vignan's Foundation for Science, Technology & Research (Deemed to be University), Vadlamudi, Guntur (Dt), Andhra Pradesh, 522213, India.
KKR & KSR Institute of Technology and Sciences, Vinjanampadu, Guntur, Andhra Pradesh, 522017, India.
J Fluoresc. 2025 Jan 22. doi: 10.1007/s10895-024-04090-0.
In this work, the conventional melt quenching approach is used to synthesize the Pr doped NaF-BiO-BO-SiO (NBBS) glasses. The influence of Pr ions on their spectroscopic and structural characteristics in glass network is investigated. The amorphous nature of the samples has been amply verified by X-ray diffraction patterns. FTIR spectra show distinct basic vibrational bands in borate and silicate structural components (in the range from 500 to 3750 cm). In the UV-visible range, the absorption spectra showed four Pr ion absorption bands. Furthermore, in the absorption spectra, four Pr ion absorption bands were observed in the NIR regions (1300-2470 nm). While utilizing Tauc plots to assess optical bandgap (Eg), it is observed that as the concentration of Pr increases from 0 mol% to 1.5 mol%, the bandgap decreases from 3.67 eV to 3.50 eV. In luminescence spectra, seven bands can be observed at about 483, 524, 534, 580, 604, 643, and 682 nm as a consequence of Pr ion transitions. Strong variations in the emission band's intensity are seen at around 604 nm (P→H), after a progressive increase in Pr mol% in the glass matrix. According to CIE coordinates, emission changes from orange to reddish-orange as the quantity of Pr ions rises.
在本工作中，采用传统的熔体淬火方法合成了掺Pr的NaF-BiO-BO-SiO（NBBS）玻璃。研究了Pr离子对其在玻璃网络中的光谱和结构特性的影响。通过X射线衍射图谱充分证实了样品的非晶性质。傅里叶变换红外光谱（FTIR）显示在硼酸盐和硅酸盐结构成分中（在500至3750cm范围内）有明显的基本振动带。在紫外-可见范围内，吸收光谱显示出四个Pr离子吸收带。此外，在吸收光谱中，在近红外区域（1300 - 2470nm）也观察到四个Pr离子吸收带。在利用陶赫图评估光学带隙（Eg）时，观察到随着Pr浓度从0mol%增加到1.5mol%，带隙从3.67eV降至3.50eV。在发光光谱中，由于Pr离子跃迁，在约483、524、534、580、604、643和682nm处可观察到七个谱带。随着玻璃基体中Pr摩尔百分比的逐渐增加，在约604nm（P→H）处发射带强度出现强烈变化。根据国际照明委员会（CIE）坐标，随着Pr离子数量的增加，发射从橙色变为红橙色。
