Sensitized red luminescence from Bi3+ co-doped Eu3+: ZnO–B2O3 glasses

✍ Scribed by Atul D. Sontakke; Anal Tarafder; Kaushik Biswas; K. Annapurna

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 376 KB
• Volume: 404
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2009.05.053

✦ Synopsis

Photoluminescence properties of Bi 3+ co-doped Eu 3+ containing zinc borate glasses have been investigated and the results are reported here. Bright red emission due to a dominant electric dipole transition 5 D 0 -7 F 2 of the Eu 3+ ions has been observed from these glasses. The nature of Stark components from the measured fluorescence transitions of Eu 3+ ions reveal that the rare earth ions could take the lattice sites of C s or lower point symmetry in the zinc borate glass hosts. The significant enhancement of Eu 3+ emission intensity by 346 nm excitation ( 1 S 0 -3 P 1 of Bi 3+ ions) elucidates the sensitization effect of co-dopant. The energy transfer mechanism between sensitizer (Bi 3+ ) and activator (Eu 3+ ) ions has been explained.