Synthesis and spectral studies on Dy3+- doped P2O5–SiO2–BaF2–MgO–SrF2 glasses examined with different transition metal nitrates for the design of WLEDs

• Published in: Ceramics international 2024-11
• Main Authors: Arul raja sekaran, S., Naseer, K.A., Kagola, Upendra Kumar, kebaili, Imen, Sayyed, M.I., Marimuthu, K.
• Format: Article
• Language: English
• Subjects: Colour CIE; Nephelauxetic effect; Nitrate glasses; Phospho-silicate glasses; WLED glasses
• ISSN: 0272-8842
• DOI: 10.1016/j.ceramint.2024.11.247

Nitrate-incited, dysprosium ion-doped phospho-silicate glasses were prepared for a white light emission via a traditional melt quenching process. Five sets of glasses were prepared with a compositional configuration of PSiMCBSD:MO (MO = Ni(NO3)2, AgNO3, Cu(NO3)2 and Fe(NO3)3). The substantial effects of transition metal nitrates were examined using a range of spectroscopic techniques. The absorption spectra were recorded in the visible and near-infrared regions. The bonding nature (Dy–O) was found to be ionic based on the Nephelauxetic and bonding parameters. The shift in the band position of the transitions that occurred in the present complex was compared with that of an aquo-ion transition. The variation in the absorption intensity of Dy3+ due to the host matrix was analysed using JO theory. The oscillatory strengths of all transitions were calculated along with their mean square deviations. The transition from 6H15/2 to 6F11/2 is hypersensitive. The JO intensity parameters were estimated and followed the trend as Ω2>Ω4>Ω6, and the PSiMCBSD:Ag glass obeyed the Ω2>Ω6>Ω4 trend, indicating the variation in the vibrational amplitudes of the interatomic distances. 6H15/2, 6H13/2, 6H11/2 and 6H9/2 are the emission transitions originate from 4F9/2. The silver nitrate-incorporated glass (PSiMCBSD:Ag) achieved lasing action with a branching ratio of 63.3 %. The CIE investigation revealed that all the glasses secured inside the white-light region and the PSiMCBSD:Ag and PSiMCBSD:Fe emissions exhibited minimal colour purity of approximately 19.5 % and 5.8 %, respectively. In summary, the incorporation of silver nitrate into the PSiMCBSD network enhances the optical performance.