Physical and Upconversion Photoluminescence Properties in Nd³⁺-Yb³⁺ Doped Lead Borate Glasses at 980 nm Excitation

Abstract:

Frequency upconversion (UC) photoluminescence (PL) in PbO-B₂O₃ glass codoped with trivalent ions of neodymium (Nd³⁺) and ytterbium (Yb³⁺) is prepared by melt quench method. X-ray diffraction (XRD) and differential scanning carorimetry (DSC) done for structural and thermal studies. Physical properties as density, oxygen packing density, lanthanide ion concentration etc. calculated. Photoluminescence of the sample gives the information of spectral lines, corresponding to the Nd3+ transitions ⁴G_9/2 ⁴I_9/2 (at 500 nm), ⁴G_7/2 ⁴I_9/2 (at 550 nm), [⁴G_5/2; ²G_7/2] ⁴I_11/2 (at 595 nm) and ⁴G_7/2 ⁴I_13/2 (at 660 nm). The dependence of the UC intensity with the Yb³⁺ concentration and the time behavior of the UC signal indicated the presence of two energy transfer (ET) pathways involving Nd³⁺-Yb³⁺ pairs and Yb³⁺-Nd³⁺-Yb³⁺ triads. Rate-equations for the population densities of the lanthanide energy levels were used to describe the dynamics of the UC emission and to determine the ET rates.

• Periodical: Key Engineering Materials (Volume 1001)
• Pages: 49-56
• DOI: https://doi.org/10.4028/p-613RmY
• Online since: December 2024
• Authors: Renuka Bairagi, Ghizal F. Ansari*, Kiran Singhal, M.Y. Lone, Sachin K. Mahajan
• Keywords: Energy Transfer, Frequency Upconversion, Lanthanide Ions, Photoluminescence

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