TiO[sub]2[/sub]-PHT interface influence to charge carrier photo generation and recombination

G. Sliaužys; G. Juška; K. Genevičius; J. H. Smått; M. Lindén; R. Österbacka

doi:10.1117/12.815634

2 December 2008 TiO₂-PHT interface influence to charge carrier photo generation and recombination

G. Sliaužys, G. Juška, K. Genevičius, J. H. Smått, M. Lindén, R. Österbacka

Proceedings Volume 7142, Sixth International Conference on Advanced Optical Materials and Devices (AOMD-6); 71420K (2008) https://doi.org/10.1117/12.815634
Event: Sixth International Conference on Advanced Optical Materials and Devices, 2008, Riga, Latvia

Abstract

In this paper the influence of TiO₂/polymer (RR-P3HT) interface to photo generated charge carriers separation and recombination have been studied. The quantum efficiency and charge carrier recombination were studied in heterojunctions of TiO₂ (prepared with porous or flat interface) and spin coated RR-P3HT polymer film using time of flight (TOF) and double injection (DoI) transient methods. From the shape of the TOF transients it was determined that the charge carrier generation is taking place in the vicinity of the TiO₂/P3HT interface. Samples with porous TiO₂ films show better charge carrier separation, but the deep trapping of charge carriers at the interface appear. The charge carrier recombination is trimolecular (Auger type recombination) with the similar values of recombination coefficients in both types of samples.

Citation Download Citation

G. Sliaužys, G. Juška, K. Genevičius, J. H. Smått, M. Lindén, and R. Österbacka "TiO₂-PHT interface influence to charge carrier photo generation and recombination", Proc. SPIE 7142, Sixth International Conference on Advanced Optical Materials and Devices (AOMD-6), 71420K (2 December 2008); https://doi.org/10.1117/12.815634

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