Sol-gel silica thin films embedding an ytterbium quinolinolato complex (YbClQ4YbClQ4) have been obtained using different alkoxides. Homogeneous, crack- and defect-free thin films of optical quality have been successfully deposited on glass substrate by dip-coating. The silica thin films have been characterized by time-resolved photoluminescence. The luminescence properties of the YbClQ4YbClQ4 are preserved in silica films prepared through an optimized sol-gel approach. The excited state lifetime of the lanthanide is comparable to those observed in bulk and longer than the corresponding ones in solution.
Sol-gel silica films embedding NIR-emitting Yb-quinolinolate complexes
FIGUS, CRISTIANA;QUOCHI, FRANCESCO;ARTIZZU, FLAVIA;SABA, MICHELE;MERCURI, MARIA LAURA;SERPE, ANGELA;DEPLANO, PAOLA;MURA, ANTONIO ANDREA;BONGIOVANNI, GIOVANNI LUIGI CARLO
2014
Abstract
Sol-gel silica thin films embedding an ytterbium quinolinolato complex (YbClQ4YbClQ4) have been obtained using different alkoxides. Homogeneous, crack- and defect-free thin films of optical quality have been successfully deposited on glass substrate by dip-coating. The silica thin films have been characterized by time-resolved photoluminescence. The luminescence properties of the YbClQ4YbClQ4 are preserved in silica films prepared through an optimized sol-gel approach. The excited state lifetime of the lanthanide is comparable to those observed in bulk and longer than the corresponding ones in solution.
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