The Effect of Gold Nanoparticles on the Structural, Optical, and Emission Properties of Dy 3+ ‐Doped Bismuth Borosilicate Glasses and Glass Ceramics

Dysprosium‐doped bismuth borosilicate glasses with and without gold nanoparticles were synthesized via the conventional melt‐quenching technique to investigate the influence of AuNP incorporation on their structural and optical properties. The amorphous nature of the as‐prepared glasses was confirmed by X‐ray diffraction (XRD), and Fourier‐transform infrared analysis revealed characteristic borate and silicate groups. The UV–vis absorption spectra demonstrated distinct surface plasmon resonance features in the AuNP‐doped sample, indicating successful nanoparticle incorporation within the glass matrix. The prepared glasses were further heat‐treated to obtain corresponding glass ceramics, and the formation of crystalline phases was verified by XRD analysis. The photoluminescence studies of glass and glass–ceramic samples showed intense emission bands corresponding to Dy 3+ transitions, with a significant enhancement in luminescence intensity. The improvement is attributed to localized surface plasmon–enhanced energy transfer between Dy 3+ ions and gold nanoparticles, as well as to structural ordering in the crystalline phase. These findings suggest that Dy 3+ ‐doped bismuth borosilicate glasses and glass ceramics containing AuNPs are promising candidates for photonic and optoelectronic device applications due to their improved emission characteristics and thermal stability.