Enhancement of Eu ³⁺ Luminescence by Ag Species ( Ag NP s, ML ‐ Ag , Ag ⁺ ) in Oxyfluoride Glasses

Abstract

Enhanced Eu 3+ luminescence by three Ag species in transparent Ag – Eu 3+ co‐doped oxyfluoride glasses was investigated systematically. Under 464 nm excitation, enhancement of Eu 3+ luminescence (four times) is attributed to local‐field surface plasmon resonance ( SPR ) effect of Ag nanoparticles ( NP s). Under 350 nm excitation, significant enhancement of Eu 3+ emission (540 times) is assigned to energy transfer ( ET ) from very small molecule‐like, nonplasmonic Ag particles ( ML ‐ Ag ) to Eu 3+ . Under 270 nm excitation, big enhancement of Eu 3+ luminescence (75 times) is ascribed to ET from isolated Ag + to Eu 3+ . Our research may extend the understanding of interactions between Ag species and Eu 3+ .