LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Concentration-Dependent Fluorescence and Judd–Ofelt Analysis of Trivalent-Praseodymium-Doped Alkali Fluoroborate Glass

Photo from wikipedia

The effects of different concentrations of Pr 3+ ions on the optical properties of (70− x )B 2 O 3  + 10BaO + 10K 2 O + 10ZnF 2  +  x Pr 6 O 11… Click to show full abstract

The effects of different concentrations of Pr 3+ ions on the optical properties of (70− x )B 2 O 3  + 10BaO + 10K 2 O + 10ZnF 2  +  x Pr 6 O 11 ( x  = 0.02 mol.%, 0.03 mol.%, 0.05 mol.%, 0.1 mol.%, and 0.5 mol.%) glass prepared by the melt quenching technique have been studied. The structural and luminescence behavior of the prepared glasses were studied by x-ray diffraction (XRD) analysis, Fourier-transform infrared (FTIR) spectroscopy, optical absorption spectroscopy, and photoluminescence excitation and emission spectroscopy. The XRD spectrum confirmed the amorphous nature while the FTIR spectrum revealed the presence of different structural groups in the prepared glass samples. The optical absorption spectrum was used to determine important parameters such as the nephelauxetic ratio, bonding parameter, optical bandgap energy, and Urbach energy. The PL spectra of the prepared glasses showed four prominent peaks at wavelengths of 484 nm, 601 nm, 693 nm, and 725 nm, related to the 3 P 0  →  3 H 4 , 1 D 2  →  3 H 4 , 3 P 0  →  3 F 3 , and 3 P 0  →  3 F 4 transitions, respectively. Furthermore, the Judd–Ofelt (JO) intensity parameters Ω λ ( λ  = 2, 4, 6) and other important spectroscopic parameters such as the transition probability ( A ), radiative lifetime ( τ R ), and branching ratio ( β R ) were calculated to evaluate the radiative properties of Pr 3+ levels from the optical absorption spectrum. In the host matrix, the JO parameters followed the trend Ω 2  > Ω 4  > Ω 6 . The emission spectra suggested that the prepared glass samples are excellent orange–red light-emitting materials under excitation at 442 nm ( 3 H 4  →  3 P 2 ). Quenching of the fluorescence intensity with increase of the Pr 3+ concentration was also observed. The emission spectrum was used to determine the Commission Internationale de I’Éclairage (CIE) 1931 color coordinates. The results suggested the suitability of the prepared materials for various orange–red light-emitting applications, mainly in display devices, lasers, and optical amplifiers.

Keywords: glass; judd ofelt; spectrum; mol mol; spectroscopy

Journal Title: Journal of Electronic Materials
Year Published: 2020

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.