| Full text | |
| Author(s): |
Ribeiro, Antonio C. C.
[1, 2]
;
Camargo, Henrique S.
[1]
;
Pereira, Douglas H.
[3, 4]
;
Custodio, Rogerio
[3]
;
Martins, Tatiana D.
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Fed Goias, Inst Quim, Campus 2 Samambaia, POB 24242, BR-74690970 Goiania, Go - Brazil
[2] Inst Fed Educ Ciencia & Tecnol, Campus Morrinhos, POB 92, BR-75650000 Morrinhos, Go - Brazil
[3] Univ Estadual Campinas, Inst Quim, POB 6154, BR-13083970 Campinas, SP - Brazil
[4] Univ Fed Tocantins, Campus Gurupi, POB 66, BR-77410530 Gurupi, To - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Chemical Society; v. 29, n. 3, p. 543-559, MAR 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
In this work, we examined how photoluminescence in poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) is affected by morphology, dictated by the mode of preparation. For that, MEH-PPV dilute solutions in good and non-solvents, thick cast films with poly[methylmethacrylate] (PMMA) as inert matrix and spin-coated thin films were prepared. These systems were studied by steady-state and time-dependent fluorescence spectroscopy and electronic microscopy. Unexpected photoluminescent behavior was detected in solutions and films and it was related to different excitons modulated by MEH-PPV conformation. By semi empirical calculations we obtained the singlet and triplet state energies of an MEH-PPV model system and, from time-resolved fluorescence spectroscopy, the existence of short-lived excited states was revealed, enabling us to infer on possible singlet fission in MEH-PPV-based systems. (AU) | |
| FAPESP's process: | 13/08293-7 - CCES - Center for Computational Engineering and Sciences |
| Grantee: | Munir Salomao Skaf |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |