Influence of the Eu2+ on the Silver Aggregates Formation in Ag+Na+ Ion-Exchanged Eu3+-Doped Sodium–Aluminosilicate Glasses



Europium-doping sodium–aluminosilicate glasses are prepared by melt-quenching method, in which europium ions were spontaneously reduced from their trivalent to divalent state. The silver was introduced into glasses by Ag+Na+ ion exchange and the interactions between europium ions and silver species were investigated. Owing to energy transfer (ET) from Ag+/silver aggregates to Eu3+, significant enhancements of Eu3+ emission were observed for 285/350-nm excitation, respectively. The divalent europium ions promote the formation of silver aggregates in the process of ion exchange.