Influence of nanosized defects on photoluminescence efficiency of Er3+ ions co-doped with Au2 O3 in a lead boroselenate glass ceramic system: a novel approach using positron annihilation lifetime spectroscopy

Annapureddy Siva Sesha Reddy; Marek Kostrzewa; Valluri Ravi Kumar; Adam Ingram; Nutalapati Venkatramaiah; Gnanamuthu Sahaya Baskaran; Vandana Ravi Kumar; Nalluri Veeraiah

doi:10.1002/bio.4357

Influence of nanosized defects on photoluminescence efficiency of Er³⁺ ions co-doped with Au₂ O₃ in a lead boroselenate glass ceramic system: a novel approach using positron annihilation lifetime spectroscopy

Luminescence. 2022 Oct;37(10):1776-1784. doi: 10.1002/bio.4357. Epub 2022 Aug 12.

Authors

Annapureddy Siva Sesha Reddy^{1

2}, Marek Kostrzewa³, Valluri Ravi Kumar⁴, Adam Ingram³, Nutalapati Venkatramaiah⁵, Gnanamuthu Sahaya Baskaran⁶, Vandana Ravi Kumar¹, Nalluri Veeraiah^{1

6}

Affiliations

¹ Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, AP, India.
² Department of Physics, Krishna University, Machilipatnam, Andhra Pradesh, India.
³ Faculty of Physics, Opole University of Technology, Opole, Poland.
⁴ Department of Physics, Andhra Loyola Institute of Engineering & Technology, Vijayawada, India.
⁵ Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, India.
⁶ Department of Physics, Andhra Loyola College, Vijayawada, India.

PMID: 35921228
DOI: 10.1002/bio.4357

Abstract

This study consists of the results of an investigation into the influence of the free-volume space (f_v ) defects on luminescence efficiency (LE) of erbium ions in Au₂ O₃ -doped PbO-B₂ O₃ -SeO₂ (PBS) glass ceramics. Glass ceramics containing fixed concentrations of Er³⁺ ions and varied concentrations of Au₂ O₃ were synthesized. X-ray diffraction studies indicated that the samples contained Au₂ (SeO₃ )₃ crystalline phase and nano gold metallic particles. The concentration of defects entrenched in the glass ceramics estimated in terms of Au₂ O₃ content using positron annihilation lifetime spectroscopy measurement indicated the highest content in the glass ceramic containing 0.075 mol% of Au₂ O₃ . Optical absorption and the photoluminescence (PL) spectra of the glass ceramics were studied in the visible region. The observed increase of PL efficiency was attributed to the enhanced concentration of free-volume imperfections in the samples. A perfect correlation could be achieved between the free-volume fraction and the PL efficiency of erbium ions in these glass ceramics.

Keywords: Er3+ ions; PAL spectroscopy; PbO-B2O3-SeO2 (PBS) glass ceramics; gold metallic particles.