Abstract
Synthesizing Yttrium Aluminium Garnet (YAG) into nanoscale fibers significantly enhances its optical properties. These nanofibers exhibit excellent flexibility, lightweight nature, and high strength, making them highly suitable for smart clothing applications. Additionally, by doping rare earth ions into the YAG fibers, their luminescence properties can be further optimized, opening new possibilities for advanced smart clothing designs. In this paper, we present the successful fabrication of dysprosium (Dy) doped YAG nanofibers, lanthanum (La) doped YAG nanofibers, La co-doped Dy: YAG nanofibers with different concentration and investigate their photoluminescence properties. The photoluminescence excitation spectrum of the Dy3+-YAG nanofibers showed an intense peak centred at 350 nm due to absorption by Dy3+ ions and emits strong blue colour centred at 483 nm in emission spectrum, which is attributed to the 4F9/2 → 6H15/2 transition of Dy3+ions. The La3+-YAG nanofibers excited at 350 nm also showed an emission in blue region at 483 nm. Co-doping of La3+ ions in Dy3+-YAG nanofibers exhibited enhancement in the emission intensity significantly. In comparison with all as-synthesized nanofibers, specific concentration of Dy and La in YAG nanofibers would be the potential candidate for flexible light emitting devices.
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