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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
IJPAP Vol.49(06) [June 2011] >
| 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 (5D4→7F5) 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 (5D0→7F2). |
| Page(s): | 377-381 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.49(06) [June 2011]
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