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Title: Light-emission in Tb3+ and Eu3+: PVP polymer films
Authors: Sivaiah, K
Buddhudu, S
Keywords: Structural-optical characterization
Luminescent polymers
Polymer films
Issue Date: Jun-2011
Publisher: NISCAIR-CSIR, India
Abstract: Analysis of photoluminescence spectra of PVP and Tb3+ or Eu3+: PVP polymer films has been done. Emission spectrum of the host matrix poly (vinyl pyrrolidone) (PVP) has shown an intense blue emission at 424 nm [π0→ n1π2]. By using a solution cast method, more clear and transparent PVP polymer films have been developed for analysis with the addition of Tb3+ and Eu3+ ions separately into PVP polymer matrix; green and red colour emitting polymer films have been developed. Also undoped PVP polymer film has been prepared as a reference film for which XRD, FTIR, Raman and TGA-DTA spectral profiles have been carried out. From the measured emission spectrum of the Tb3+: PVP polymer film, an intense green emission at 544 nm (5D47F5) has been observed with an excitation at 311 nm. Under an UV source a bright green emission has been noticed from the surface of the Tb3+: PVP polymer film, and a bright red emission has been noticed from the surface of the Eu3+: PVP polymer film. The emission spectrum of Eu3+: PVP polymer film has also revealed an intense red emission at 612 nm (5D07F2).
Description: 377-381
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(06) [June 2011]

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