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Reflective properties of electrochromic devices with polymer electrolytes

Grant number: 13/19297-3
Support type:Regular Research Grants
Duration: July 01, 2014 - December 31, 2016
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal Investigator:Agnieszka Joanna Pawlicka Maule
Grantee:Agnieszka Joanna Pawlicka Maule
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Assoc. researchers:Carla Cristina Schmitt Cavalheiro ; Cesar Antonio Oropesa Avellaneda
Associated grant(s):14/17174-4 - Reflective properties of electrochromic devices with polymer electrolytes, AP.EMU


The aim of this proposal is to study the reflective properties of electrochromic devices containing natural and/or synthetic polymers as electrolytes. The electrochromic devices will be obtained by assembling electrochromic layer, counter electrode consisting of CeO2-TiO2 and electrolyte based on synthetic or natural macromolecules such as agar, pectin, gelatin and DNA, developed in our laboratory. The analysis and characterization of the electrochromic windows will be performed trough the electrochemical and spectroscopic measurements for the colored and transparent states. The values of inserted and extracted charges, potential window of operation as well as the number of cycles, color/bleaching time and memory of the devices in open circuit will be obtained. Beside this the main objective is to determine the device color LAB parameters using CIELAB 1976 system. These measurements will be performed in reflectance mode on windows with different compositions in order to correlate the composition with the obtained parameters. Aiming possible practical applications the possibility of using flexible transparent substrate as PET/ITO and the rigid-reflective-substrate as stainless steel to obtain different devices will be also investigated. Finally, to achieve high contrast ratios use of a complementary color to the primary electrochromic layer electrodes as poly (ethylene dioxitiofeno) (PEDOT) and WO3, respectively will be tested. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ALVES, R.; SENTANIN, F.; SABADINI, R. C.; PAWLICKA, A.; SILVA, M. M. Innovative electrolytes based on chitosan and thulium for solid state applications: Synthesis, structural, and thermal characterization. Journal of Electroanalytical Chemistry, v. 788, p. 156-164, MAR 1 2017. Web of Science Citations: 10.
ALVES, R.; DONOSO, J. P.; MAGON, C. J.; SILVA, I. D. A.; PAWLICKA, A.; SILVA, M. M. Solid polymer electrolytes based on chitosan and europium triflate. Journal of Non-Crystalline Solids, v. 432, n. B, p. 307-312, JAN 15 2016. Web of Science Citations: 18.
ASSIS, L. M. N.; SABADINI, R. C.; SANTOS, L. P.; KANICKI, J.; LAPKOWSKI, M.; PAWLICKA, A. Electrochromic device with Prussian blue and HPC-based electrolyte. Electrochimica Acta, v. 182, p. 878-883, NOV 10 2015. Web of Science Citations: 8.

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