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Proceedings Paper

Kinetic analysis of long-lived luminescence in modified epoxy resins
Author(s): Arkadiusz Mandowski; Ewa Mandowska; P. Czub; W. Mazela; Jozef Swiatek; Jan Pielichowski
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Paper Abstract

Epoxy resins are widely known due to their excellent mechanical properties, high thermal stability and high chemical resistivity. Recently, a new class of the materials was synthesized containing carbazole derivatives. This modification does not influence superior mechanical properties of epoxy resins, but significantly improves their luminous capacity. Absorption spectra exhibit edge at about 355 nm. Excitation at shorter wavelengths causes intense photoluminescence (PL) in UV and VIS region even at room temperature. This paper presents long-lived luminescence properties of carbazole derivative modified epoxy resins. These processes are competitive to PL. Therefore, in modified epoxy resins they are very weak. Phosphorescence decay (PD) and thermoluminescence (TL) experiments were performed using liquid nitrogen cooled CCD detection system. It allows measuring ultra-weak spectrally resolved luminescence in the range 200..1000 nm. The measurements were performed in a vacuum at different temperatures from 80 to 330 K. Phosphorescence and thermoluminescence spectra exhibit several emission bands indicating various recombination mechanisms. The kinetics of PD and TL was analysed using a new numerical technique that allows determination of characteristic activation energies and deconvolution of three-dimensional spectra for individual processes.

Paper Details

Date Published: 22 October 2003
PDF: 8 pages
Proc. SPIE 5136, Solid State Crystals 2002: Crystalline Materials for Optoelectronics, (22 October 2003); doi: 10.1117/12.519676
Show Author Affiliations
Arkadiusz Mandowski, Pedagogical Univ. of Czestochowa (Poland)
Ewa Mandowska, Pedagogical Univ. of Czestochowa (Poland)
P. Czub, Cracow Univ. of Technology (Poland)
W. Mazela, Cracow Univ. of Technology (Poland)
Jozef Swiatek, Pedagogical Univ. of Czestochowa (Poland)
Jan Pielichowski, Cracow Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 5136:
Solid State Crystals 2002: Crystalline Materials for Optoelectronics
Jaroslaw Rutkowski; Antoni Rogalski, Editor(s)

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