Photoluminescence and Fourier Transform Infrared Spectral Studies of Varying Levels of Manganese Doping in Zinc Phosphate Oxide Glasses

• Published in: Journal of electronic materials 2023-07, Vol.52 (7), p.4551-4557
• Main Authors: Sebak, M. A., Guizani, I., Gami, Fatma, Mostafa, Massaud, Mostafa, M. M.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Electronics and Microelectronics; Fourier transforms; Infrared spectra; Infrared spectroscopy; Instrumentation; Ion concentration; Ions; Manganese dioxide; Manganese ions; Materials Science; Optical and Electronic Materials; Original Research Article; Phosphate glass; Phosphorus pentoxide; Photoluminescence; Solid State Physics; Spectrophotometry; Ultraviolet absorption; Zinc oxide; Zinc phosphate
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-023-10389-8

Zinc phosphate glasses with varying gradient Mn ion concentrations of x MnO-(57.5- x ) ZnO-2.5Al 2 O 3 -40 P 2 O 5 were prepared by melting annealing. UV/Vis, Fourier transform infrared (FTIR), and photoluminescence (PL) spectrophotometric tests examined the spectra and structural changes of the glassy samples. Electronic spectral graphs exhibit considerable ultraviolet absorption with a distinct band shifting to slightly higher wavelengths with MnO 2 addition and two more bands in glasses with increasing manganese ion content (8–10%). FTIR spectral data show phosphate group vibrational peaks between 400 cm −1 and 1600 cm −1 , assuming that Zn-O or P-O-Zn vibrations are shared. The PL spectra subsequently exhibited a wider band in the range 500–750 nm and two-component peaks at greater manganese ion concentrations. As manganese ion concentration increases, divalent manganese ions of the known spin-forbidden absorption type that require high MnO 2 content are identified. All spectral data suggest and validate the lack of trivalent manganese ions, and as the manganese ion concentration increases, divalent manganese ions of known spin-forbidden absorption type with high MnO2 content are detected. The reducing nature of the host zinc phosphate glass favors the reduced valence of manganese ions.