Energy transfer based photoluminescence spectra of Dy3+, Sm3+: PEO+PVP polymer films

Kumar, Naveen ; Rudramadevi, B. H. ; S, Buddhudu

Abstract

Dy3+, Sm3+ ions doped PEO+PVP polymer films and also a host PEO+PVP polymer films have successfully been synthesized by solution casting method. For the PEO+PVP film, its XRD, FTIR, Raman and TG-DTA profiles have been investigated in order to understand its structural and thermal properties. Dy3+ doped film has displayed a blue emission under an UV source. Photoluminescence spectra have been measured to study its optical properties. For observed blue emission at 480 nm (4F9/26H15/2) of Dy3+ film, its decay curve has been measured in evaluating the lifetime of the blue emission. The Sm3+ polymer film has displayed an orange emission under an UV source. For this Sm3+ film, emission spectra have been measured to evaluate its optical properties. For the orange emission at 600 nm (4G5/26H7/2) of Sm3+, the transitions of Sm3+ are clearly explained in the form of an energy level diagram. In the co-doped system, an energy transfer between the dopant ions in the host polymer matrix has been explained. These results suggest these films as blue and orange luminescent optical materials.

Keyword(s)

Dy3+; Sm3+: PEO+PVP polymer films, Analysis; Photoluminescence spectra; Energy transfer

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