Blending with a phthalocyanine leads to improved P3HT donor layers for OPVs - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Synthetic Metals Année : 2020

Blending with a phthalocyanine leads to improved P3HT donor layers for OPVs

Résumé

Ternary blended solar cells have been intensively studied in recent years, where the addition of a second donor material in the active layer tends to increase the current density through improved photon absorption along with improving the charge transport properties and the inhibition of charge recombination processes. Here, we investigated a donor layer composed of a liquid crystalline cobalt phthalocyanine (CoPc) and poly(3-hexylthiophene-2,5-diyl) – P3HT. The CoPc presents a complementary absorption spectrum in the near infrared region and compact anisotropic molecular arrangement to promote efficient charge migration. The energy levels of CoPc are properly located between the corresponding levels of P3HT and PCBM, forming an energy cascade alignment. The P3HT/CoPc blend showed improved photophysical and electrical response depending on the CoPc concentration and thermal annealing. We demonstrated that molecular order, morphology and energetic barrier at cluster interfaces are competing effects and need to be taken into account to optimize charge transport.
Fichier principal
Vignette du fichier
SilvaSouza 2020 HAL.pdf (2.79 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02891951 , version 1 (07-07-2020)

Identifiants

Citer

Diego Fernando Silva Sousa, Marta Elisa Rosso Dotto, Juliana Eccher, Harald Bock, Ivan Bechtold. Blending with a phthalocyanine leads to improved P3HT donor layers for OPVs. Synthetic Metals, 2020, 263, pp.116367. ⟨10.1016/j.synthmet.2020.116367⟩. ⟨hal-02891951⟩

Collections

CNRS INC-CNRS
70 Consultations
44 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More