| Texto completo | |
| Autor(es): |
Eccher, Juliana
[1, 2]
;
Faria, Gregorio C.
[3]
;
Bock, Harald
[4, 5]
;
von Seggern, Heinz
[2]
;
Bechtold, Ivan H.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC - Brazil
[2] Tech Univ Darmstadt, Inst Mat Sci, Dept Elect Mat, D-64287 Darmstadt - Germany
[3] Univ Sao Paulo, Inst Fis Sao Paulo, BR-13560970 Sao Carlos, SP - Brazil
[4] Univ Bordeaux, Ctr Rech Paul Pascal, F-33600 Pessac - France
[5] CNRS, F-33600 Pessac - France
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS APPLIED MATERIALS & INTERFACES; v. 5, n. 22, p. 11935-11943, NOV 27 2013. |
| Citações Web of Science: | 54 |
| Resumo | |
Discotic molecules comprising a rigid aromatic core and flexible side chains have been promisingly applied in OLEDs as self-organizing organic semiconductors. Due to their potentially high charge carrier mobility along the columns, device performance can be readily improved by proper alignment of columns throughout the bulk. In the present work, the charge mobility was increased by 5 orders of magnitude due to homeotropic columnar ordering induced by the boundary interfaces during thermal annealing in the mesophase. State-of-the-art diodes were fabricated using spin-coated films whose homeotropic alignment with formation of hexagonal germs was observed by polarizing optical microscopy. The photophysical properties showed drastic changes at the mesophase-isotropic transition, which is supported by the gain of order observed by X-ray diffraction. The electrical properties were investigated by modeling the current-voltage characteristics by a space-charge-limited current transport with a field dependent mobility. (AU) | |
| Processo FAPESP: | 08/01935-5 - Correlação das propriedades óticas e elétricas com a estrutura física e dinâmica molecular de filmes e dispositivos orgânicos de polifluorenos e derivados |
| Beneficiário: | Gregório Couto Faria |
| Linha de fomento: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 12/01303-4 - Caracterização da morfologia e estrutura molecular em filmes de polímeros conjugados para aplicações em dispositivos fotovoltaicos de alta performance |
| Beneficiário: | Gregório Couto Faria |
| Linha de fomento: | Bolsas no Brasil - Pós-Doutorado |