Luminescence Enhancement of CdS Quantum Dots in Glass by Ag + Ion Exchange
Abstract
Luminescence of CdS quantum dots ( QD s) enhanced by the induction of Ag nanoparticles ( NP s) in glasses was investigated. Ag + ions diffused into glasses containing CdS QD s by ion exchange, then formed Ag NP s after subsequent heat treatment. Luminescence intensity of CdS QD s increased approximately three times when the ion‐exchange duration was 1 min, but was severely quenched when the duration was extended to 30 min. Increasing the amount of Ag + ions increased the number of Ag NP s and decreased the average distance between Ag NP s and CdS QD s. This decrease in the average distance induced the changes of luminescence intensity.
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