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1 Materials Science Poland

1 2006

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Preparation and upconversion properties of Er3+,Yb3+:Y2Si2O7 nanocrystallites embedded in PVA polymer nanocomposites

Hreniak D., Głuchowski P., Stręk W., Bettinelli M., Kozłowska A., Kozłowski M.

Materials Science Poland

2006

Vol. 24, No. 2/1

405--413

The preparation of polymer nanocomposites consisting of poly(vinyl) alcohol (PVA) network and RE3+:Y2Si2O7 nanocrystalline particles (RE=Yb, Er) is presented. The optical properties of the nanocomposite were preliminarily studied. In particular, efficient upconversion was observed in Er3+ and Yb3+ codoped Y2Si2O7 nanoparticles embedded in the polymeric PVA host. It was found that the luminescence features of the RE3+:Y2Si2O7 nanoparticles were affected by the polymeric host, resulting in a shortening of the luminescence lifetimes. This effect is discussed in terms of effective refractive index.