Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Abstract

This paper reports the white solid-state lighting potential of gold nanoparticles-imbued Dy3+-doped Li2CO3–SrO–ZnO–B2O3 glasses prepared using melt quenching. The produced materials undergo characterizations using various instrumentations to access the sensitivity of changing AuNP concentrations on their emission and colorimetric characteristics. XRD phase analysis established that the samples were glasses. TEM analysis shows AuNPs, whereas EDX spectroscopic analysis confirmed the inclusion of precursor elements into the glasses. The thermal stability, Hruby parameter, and glass-forming ability are 146 to 156 oC, 1.27 to 1.39, and 66-0.65, respectively. The optical absorption spectra of the glasses are consistent with Dy3+ transitions, while the surface plasmon resonance band fits the AuNPs characteristics band. The emission spectroscopic analysis reveals 1.52, 1.84, and 1.14 intensification for 6H15/2, 6H13/2, and 6H11/2 transitions. The Judd-Ofelt evaluation was made to support the experimental spectroscopic data. The CIE coordinates were traced to the cool white colour field with a purity of 15.64-7.79 % and CCT values of 5491-5437 K. The excellent thermal properties, enhanced emission, and improved colorimetric properties such as colour purity and natural daylight (cool) CCT values were due to the inclusion of AuNPs in the proposed glasses, which may be helpful in white solid-state lighting applications.