Enhanced Photoluminescence spectra of Sm~(3+) co-doped with Tb~(3+) in PEO+PVP blended polymer films

摘要

Sm~(3+)+Tb~(3+): PEO+PVP blended polymer films have successfully been synthesized by solution casting method. Structural and Optical analysis have been analyzed based on their XRD, optical absorption and photoluminescence spectral profiles. Semicrystalline nature has been confirmed by XRD analysis. Both optical absorption and photoluminescence spectra have been measured in evaluating their optical properties. The Sm~(3+): PEO+PVP polymer film has displayed a reddish-orange emission at 600 nm under UV lamp and its absorption and emission spectra have also been measured to evaluate its optical characteristics. The photoluminescence efficiency of Sm~(3+) ion has been enhanced due to the addition of Tb~(3+) by means of an energy transfer process. The energy transfer mechanism, from Tb~(3+) to Sm~(3+) has been explained clearly with Life time decay analysis. From these results, these films could be suggested as potential reddish-orange luminescent optical materials.