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We report the use of films of poly(3-hexylthiophene-2,5-diyl) nanoparticles (P3HT-NPs) prepared with the reprecipitation method employing water as solvent in the absence of surfactants for solid-state electrochromic devices (ECDs) and prove that these displays present enhanced properties when compared to similar ECDs with thin-films deposited from chloroform. Films of differently sized nanoparticles (100 to 400 nm) were prepared and spray-coated on flexible PET-ITO substrates and tested for electrochromic properties. ECDs with switching times (t90) of 4 seconds were obtained using P3HT-NPs with a diameter of 100 nm, while those built using P3HT thin-film presented longer switching speeds over 13 seconds for reduction (bleached to colored state). Additionally, the devices were subjected to 1000 cycles using -1.5V/1.5V and the displays using P3HT 100 nm NPs presented higher transmittances (ΔT=±20 …
American Chemical Society
Publication date: 
14 May 2020

Tiago Moreira, César Antonio Tonicha Laia, Mattia Zangoli, Mariana Antunes, Francesca Di Maria, Stefano De Monte, Fabiola Liscio, A Jorge Parola, Giovanna Barbarella

Biblio References: 
ACS Applied Polymer Materials