Electronic tuning effects via π-linkers in tetrathiafulvalene-based dyes - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue New Journal of Chemistry Année : 2014

Electronic tuning effects via π-linkers in tetrathiafulvalene-based dyes

, (1) , , (1) , , ,
1
Yan Geng
  • Fonction : Auteur
Flavia Pop
Chenyi Yi
  • Fonction : Auteur
Narcis Avarvari
Michael Grätzel
Silvio Decurtins
  • Fonction : Auteur
Shi-Xia Liu
  • Fonction : Auteur

Résumé

Four new tetrathiafulvalene (TTF)-based dyes featured with a donor–bridge–acceptor (D–π–A) structure were synthesized and characterized. All of them undergo two reversible oxidations to form stable radical cation and dication species. The electronic interactions between the TTF donor and the cyanoacrylic acid acceptor through the different π-linkers have been demonstrated by the presence of a photo-induced intramolecular charge-transfer (ICT) absorption band in the visible region. A red shift of the ICT state can be finely tuned by the degree of aromaticity and extended conjugation of π-bridges. To some extent, the oxidation potentials of these dyes are affected by the nature of π-bridges. They have been applied in organic dye-sensitized solar cells, showing relatively low power conversion efficiencies of up to 0.87% due to substantial charge recombination losses.

Domaines

Chimie
Fichier non déposé

Dates et versions

hal-03344927 , version 1 (15-09-2021)

Identifiants

Citer

Yan Geng, Flavia Pop, Chenyi Yi, Narcis Avarvari, Michael Grätzel, et al.. Electronic tuning effects via π-linkers in tetrathiafulvalene-based dyes. New Journal of Chemistry, 2014, 38 (7), Non spécifié. ⟨10.1039/c4nj00428k⟩. ⟨hal-03344927⟩
6 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More