| Texto completo | |
| Autor(es): |
Colucci, Renan
;
Faria, Gregorio Couto
;
Santos, Lucas Fugikawa
;
Gozzi, Giovani
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 30, n. 18, p. 9-pg., 2019-09-01. |
| Resumo | |
Conductive composites based on cross-linked poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) blends have been widely applied to produce electronic devices, such as organic electrochemical transistor, biosensors and electrochromic devices, to name a few. Notwithstanding, fundamental details regarding the influence of the cross-link agent on the charge transport mechanism of PEDOT:PSS based composites is still not completely understood. Herein, we present a study regarding the influence of the cross-link (3-glycidyloxypropyl) trimethoxysilane (GPTMS) on the charge transport mechanism of PEDOT:PSS/GPTMS composites. We have verified that the charge transport is dominated by hopping into percolated PEDOT:PSS-rich clusters for composites with a PEDOT:PSS content above 40%-wt. Interestingly, by analyzing the conductivity data by the variable range hopping model we observed that the hopping temperature, electronic localization length and charge carriers mobility remains practically independent on the PEDOT:PSS concentration. As for non-percolated composites, (i.e. below 40%-wt PEDOT:PSS), however, the charge transport is dominated by charge carrier hopping between unconnected PEDOT:PSS clusters, in which the electrical conductivity and the hopping temperature are strongly influenced by the cross-link agent content, and characterized by shorter carrier localization lengths. (AU) | |
| Processo FAPESP: | 13/21034-0 - Bioeletrônica orgânica: da caracterização de materiais ao desenvolvimento de dispositivos |
| Beneficiário: | Gregório Couto Faria |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |