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Authors: Paulo M. Zagalo ; Gonçalo Magalhães-Mota ; Susana Sério ; Paulo A. Ribeiro and Maria Raposo

Affiliation: Faculdade de Ciências e Tecnologia and UNL, Portugal

Keyword(s): Birefringence, Azobenzene, PAZO, Thin Films, Energy Harvesting.

Abstract: It has been recently shown that solar light is able to induce a small birefringence in azo-benzene chromophore containing thin films, parallel to its surface. In order to enhance this effect, towards the development of energy harvesting devices, poly{1-(4-(3-carboxy-4-hydroxy-phenylazo)benzenesulfonamido)-1,2-ethanediyl, sodium salt} (PAZO) cast films were thermally polarized to achieve a net dipole moment in the medium. Therefore, creation and relaxation kinetics curves of PAZO cast films were obtained in terms of poling at different temperatures and applied voltages. Results show that the maximum birefringence induced is proportional to both temperature and applied external electrical field while the relaxation curves reveal that the residual birefringence increases with the temperature, behaviour which is indicative of cooperative orientation processes between the chromophores which in turn guarantees the stability of chromophores orientation.

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Paper citation in several formats:
Zagalo, P.; Magalhães-Mota, G.; Sério, S.; Ribeiro, P. and Raposo, M. (2017). Electric-field Induced Birefringence in Azobenzene Thin Films. In Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS 2017) - AOMat; ISBN 978-989-758-223-3; ISSN 2184-4364, SciTePress, pages 381-385. DOI: 10.5220/0006321603810385

@conference{aomat17,
author={Paulo M. Zagalo. and Gon\c{C}alo Magalhães{-}Mota. and Susana Sério. and Paulo A. Ribeiro. and Maria Raposo.},
title={Electric-field Induced Birefringence in Azobenzene Thin Films},
booktitle={Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS 2017) - AOMat},
year={2017},
pages={381-385},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006321603810385},
isbn={978-989-758-223-3},
issn={2184-4364},
}

TY - CONF

JO - Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS 2017) - AOMat
TI - Electric-field Induced Birefringence in Azobenzene Thin Films
SN - 978-989-758-223-3
IS - 2184-4364
AU - Zagalo, P.
AU - Magalhães-Mota, G.
AU - Sério, S.
AU - Ribeiro, P.
AU - Raposo, M.
PY - 2017
SP - 381
EP - 385
DO - 10.5220/0006321603810385
PB - SciTePress

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