Effects of the negative electrode contact on the performance of poly(hexylthiophene):6,6-phenyl-C-61-butyric acid methyl ester based organic solar cells

T. P. Nguyen (1) , P. Girault (1) , Cédric Renaud (2) , F. Reisdorffer (1) , P. Le Rendu (1) , L. Wang (3)

1 IMN - Institut des Matériaux Jean Rouxel
2 LAPLACE-LM - Lumière et Matière
3 Center for Condensed Matter Sciences Taipei

In this paper, we report the results on electrical characterization of solar cells using blends of poly(hexylthiophene) (P3HT) and 6,6-phenyl-C-61-butyric acid methyl ester (PCBM) as active energy conversion materials and different negative electrode contacts. The electrical properties analyzed by the current-voltage-temperature (I-V-T) measurements and the charge based deep level transient spectroscopy show that the low efficiency of the devices using Al electrode as compared to CaAl one is due to a reduction of defect density in the interfacial contact region and fast, irreversible degradation of the Al/(P3HT:PCBM) contact. (C) 2014 AIP Publishing LLC.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

T. P. Nguyen, P. Girault, Cédric Renaud, F. Reisdorffer, P. Le Rendu, et al.. Effects of the negative electrode contact on the performance of poly(hexylthiophene):6,6-phenyl-C-61-butyric acid methyl ester based organic solar cells. Journal of Applied Physics, 2014, 115 (1), pp.12013. ⟨10.1063/1.4838060⟩. ⟨hal-00982803⟩