Author(s)

Chandragiri Parthasaradhi Reddy, Varnakavi Naresh, Ballipalli Chandra Babu, Srinivasa Buddhudu

Department of Physics, Sri Venkateswara University, Tirupati, India.

Present paper reports on luminescence characteristics of individually doped Bi³⁺: PZL, Sm³⁺: PZL and co-doped (Bi³⁺/Sm³⁺): PZL (50P₂O₅-30ZnO-20LiF) glasses prepared by a melt quenching method. The results revealed that Bi³⁺: PZL glass exhibited a broad emission peak at 440 nm (³P₁→¹S₀) under excitation wavelength 300 nm (¹S₀→³P₁). Sm³⁺: PZL doped glass has shown a prominent orange emission at 601 nm (⁴G_5/2→⁶H_7/2) with an excitation wavelength 403 nm (⁶H_5/2→⁴F_7/2). Later on Bi³⁺ is added to Sm³⁺: PZL glass by increasing its concentrations from 0.1 - 1.5 mol%. By co-doping Bi³⁺ to Sm³⁺: PZL glass, Sm³⁺ emission intensity has been considerably enhanced till 1.0 mol% due to energy transfer from Bi³⁺ to Sm³⁺ and when its concentration exceeds this critical value (1.0 mol%) there has been a drastic decrease in Sm³⁺ emission which is explained accordingly from photoluminescence spectra, energy level diagram and lifetime measurements.

Melt Quenching, Optical Glasses, Rare Earth Ions, Photoluminescence, Luminescence Quenching and Energy Transfer

Reddy, C. , Naresh, V. , Babu, B. and Buddhudu, S. (2014) Photoluminescence and Energy Transfer Process in Bi³⁺/Sm³⁺ Co-Doped Phosphate Zinc Lithium Glasses. Advances in Materials Physics and Chemistry, 4, 165-171. doi: 10.4236/ampc.2014.49019.