Electric-field Induced Birefringence in Azobenzene Thin Films

Paulo M. Zagalo, Gonçalo Magalhães-Mota, Susana Sério, Paulo A. Ribeiro, Maria Raposo

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.

References

  1. Farinha, P., Sério,S., Ribeiro, P.A., Raposo, M., 2016. Birefringence Creation by Solar Light - A New Approach to the Development of Solar Cells with Azobenzene Materials, In Proceedings of the 4th International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS 2016), 365-368.
  2. Ferreira, Q., P. J. Gomes, M. Raposo, J. A. Giacometti, O. N. Oliveira Jr. P. A. Ribeiro , 2007 a. Influence of Ionic Interactions on the Photoinduced Birefringence of Poly[1-[4-(3-Carboxy-4 Hydroxyphenylazo) Benzene Sulfonamido]-1,2-Ethanediyl, Sodium Salt] Films, J. Nanosci. Nanotechnol. 7, 2659-2666.
  3. Ferreira, Q., Ribeiro, P.A., Oliveira Jr., O. N., Raposo, M., 2012. Long-term stability at high temperatures for birefringence in PAZO/PAH layer-by-layer films, ACS Applied Materials and Interfaces, 4, 1470-1477.
  4. Hartley, G. S.; 1937. The cis-form of azobenzene, Nature, 140, 281.
  5. Kasap. S.O., 2013. Optoelectonics and Photonics: Principles and Pratices. Pearson Education Limited, 2nd edition.
  6. Monteiro Timóteo, A.M, Ribeiro, J. H.F., Ribeiro, P.A., Raposo, M., 2016. Dynamics of creation photoinduced birefringence on (PAH/PAZO)n layer-by-layer films: Analysis of consecutive cycles. Optical Materials 51, 18-23.
  7. Natansohn, A., Rochon, P., 2002, Photoinduced Motions in Azo-Containing Polymers. Chem. Rev. 102, 4139-4175.
Download


Paper Citation


in Harvard Style

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 - Volume 1: AOMat, (PHOTOPTICS 2017) ISBN 978-989-758-223-3, pages 381-385. DOI: 10.5220/0006321603810385


in Bibtex Style

@conference{aomat17,
author={Paulo M. Zagalo and Gonçalo 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 - Volume 1: AOMat, (PHOTOPTICS 2017)},
year={2017},
pages={381-385},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006321603810385},
isbn={978-989-758-223-3},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - Volume 1: AOMat, (PHOTOPTICS 2017)
TI - Electric-field Induced Birefringence in Azobenzene Thin Films
SN - 978-989-758-223-3
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