Open AccessReport on Optical Absorption, Steady-state Emission and Time-resolved Emission Spectroscopy of Carbazole-based Conjugated Polymers
Author(s) -
Riya Dey,
Amdad Chowdury,
Nazia Chawdhury,
A. P. Monkman
Publication year - 2010
Publication title -
journal of scientific research
Language(s) - English
Resource type - Journals
eISSN - 2070-0245
pISSN - 2070-0237
DOI - 10.3329/jsr.v3i1.4666
Subject(s) - carbazole , singlet state , excited state , polymer , photochemistry , spectroscopy , triplet state , emission spectrum , materials science , conjugated system , absorption (acoustics) , absorption spectroscopy , singlet fission , chemistry , analytical chemistry (journal) , atomic physics , spectral line , organic chemistry , physics , optics , quantum mechanics , astronomy , composite material
Opto-electronic properties of three new carbazole based co-polymers were investigated. The decay kinetics of triplet emission of the co-polymers was observed. Several findings such as optical band-gap, singlet to singlet transition energies, triplet to singlet transition energies, exchange energies (?EST) have been presented. In comparison to the other material carbazole-oxadiazole based polymer with OMe, P1, H21C10, P2 and H12C10O, P3 exchange energy is below 0.5 eV and triplet energy is significantly higher. The energy gaps between singlet and triplet excited states are 0.44-0.47 eV. From decay kinetics the triplet excited state life-times were found to be several orders of ms at 10-13 K that reduces to less than 3 ms at room temperature.Keywords: Time resolved emission spectroscopy; Carbazole; Conjugated polymers.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i1.4666 J. Sci. Res. 3 (1), 13-24 (2011)