2024-03-29T13:11:27Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/104742023-01-09T13:31:11Zcom_10234_7053com_10234_9col_10234_8639
00925njm 22002777a 4500
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Planelles Aragó, José
author
Julian-Lopez, Beatriz
author
Cordoncillo, Eloisa
author
Escribano López, Purificación
author
Pellé, Fabienne
author
Viana, Bruno
author
Sánchez, Clément
author
2008
Silica glasses containing both ZnS quantum dots (QDs) and luminescent lanthanide ions are attractive
candidates to develop new lighting displays, sensor devices or laser emitters. This work reports an easy
sol–gel method to prepare Eu3+-doped and Eu3+,Mn2+-codoped ZnS nanocrystals dispersed in
a transparent silica matrix. Semiconductor nanocrystals with an average size of 5–6 nm and exhibiting
both cubic and hexagonal phases were obtained at low temperature. The luminescent interactions
between ZnS QDs, Eu3+ and Mn2+ ions provided materials with different optical responses but also
gave information about the organization of the different species in the nanocomposite. Indeed, Eu ions
were found to be both dispersed within the silica and located at the surface of the nanochalcogenide, the
latter providing a ZnS/Eu3+ energy transfer. Incorporation of Mn2+ into the ZnS lattice induced the
appearance of defect states that enhance the blue luminescence of the nanocomposite. These results
underline the sensitivity of optical processes to the nature and organization of the active species, which
is of vital importance for the design of photonic materials
09599428
http://hdl.handle.net/10234/10474
Lanthanide doped ZnS quantum dots dispersed in silica glasses: an easy
one pot sol–gel synthesis for obtaining novel photonic materials