DOI: 10.1063/1.3665392. Exciton dissociation and charge carrier recombination processes in organic semiconductors

Exciton dissociation and charge carrier recombination processes in organic semiconductors

10.1063/1.3665392

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Exciton dissociation and charge recombination processes in organic semiconductors, with thermal effects taken into account, are described in this paper. Here, we analyzed the mechanisms of polaron-excitons dissociation into free charge carriers and the consequent recombination of those carriers under thermal effects on two parallel π-conjugated polymers chains electronically coupled. Our results suggest that exciton dissociation in a single molecule give rise to localized, polaron-like charge carrier. Besides, we concluded that in the case of interchain processes, the bimolecular polaron recombination does not lead to an usual exciton state. Rather, this type of recombination leads to an oscillating dipole between the two chains. The recombination time obtained here for these processes are in agreement with the experimental results. Finally, our results show that temperature effects are essential to the relaxation process leading to polaron formation in a single chain, as in the absence of temperature, this process was not observed. In the case of two chains, we conclude that temperature effects also help the bimolecular recombination process, as observed experimentally.

Bibliography

Ribeiro, L. A., Oliveira Neto, P. H., da Cunha, W. F., Roncaratti, L. F., Gargano, R., da Silva Filho, D. A., & e Silva, G. M. (2011). Exciton dissociation and charge carrier recombination processes in organic semiconductors. The Journal of Chemical Physics, 135(22).

Authors 7

Luiz A. Ribeiro (first)
Pedro H. Oliveira Neto (additional)
Wiliam F. da Cunha (additional)
Luiz F. Roncaratti (additional)
Ricardo Gargano (additional)
Demétrio A. da Silva Filho (additional)
Geraldo M. e Silva (additional)

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Dates

Type	When
Created	13 years, 8 months ago (Dec. 9, 2011, 6:37 p.m.)
Deposited	2 years, 2 months ago (June 25, 2023, 10:49 p.m.)
Indexed	1 month ago (July 30, 2025, 6:57 a.m.)
Issued	13 years, 8 months ago (Dec. 9, 2011)
Published	13 years, 8 months ago (Dec. 9, 2011)
Published Online	13 years, 8 months ago (Dec. 9, 2011)
Published Print	13 years, 8 months ago (Dec. 14, 2011)

Funders 0

None

BibTeX

@article{Ribeiro_2011, title={Exciton dissociation and charge carrier recombination processes in organic semiconductors}, volume={135}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.3665392}, DOI={10.1063/1.3665392}, number={22}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Ribeiro, Luiz A. and Oliveira Neto, Pedro H. and da Cunha, Wiliam F. and Roncaratti, Luiz F. and Gargano, Ricardo and da Silva Filho, Demétrio A. and e Silva, Geraldo M.}, year={2011}, month=dec }

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