Investigation of spectroscopic and photoluminescence properties of Erbium doped phosphate (P₂O₅-K₂O₃-Al₂O₃) glasses

Erbium (Er) doped P₂O₅-K₂O₃-Al₂O₃:Er₂O₃ glasses (KPEr) with different contents of Er³⁺ ions were fabricated by famous melt-quenching technique. The fabricated samples were characterized by using physical, X-ray photoelectron spectroscopy (XPS), photoluminescence, absorption, and J-O analysis techniques. The XRF analyses were performed in order to know the change in elemental composition of fabricated glasses, while using the various concentrations of Er³⁺ ions. Three emission peaks were observed, two peaks in visible regions of 526 nm (²H_11/2→⁴I_15/2) and 550 nm (⁴S_3/2→⁴I_15/2) and one peak in near infrared (NIR) region of 1545 nm (⁴I_13/2→⁴I_15/2). Nine peaks were observed in absorption spectra in the range of 390–1800 nm. The trend of JO parameters for the present KPEr6 glass sample is Ω₂> Ω₄> Ω₆. Higher values of stimulated emission cross-section σ_emi(λ), full wave half maxima FWHM and (FWHM x σ_emi (λ)), for KPEr6 indicate that the present glass has potential candidate to be used for broadband amplification in telecommunication. The McCumber theory is used to study absorption and emission cross-section for ⁴I_13/2→⁴I_15/2 transition. The luminescence colors of these samples were almost entirely fall in the yellow-green (Y-G) region (x = 0.33, y = 0.64) in the CIE 1931 diagram. The calculated CCT values for our prepared glasses were found to be 5554 K. The present study suggest that KPEr glass samples have potential candidate for broadband amplification in telecommunication, green LED and display devices.