ADDA and ADADA systems based on triphenylamine as molecular donors for organic photovoltaics. Issue 31 (29th July 2015)

• Record Type: Journal Article
• Authors: Diac, Andreea; Demeter, Dora; Jungsuttiwong, Siriporn; Grosu, Ion; Roncali, Jean
• Is Part Of: Tetrahedron letters. Volume 56:Issue 31(2015)
• Page Start: 4607
• Page End: 4612
• Publication Date: 2015-07-29
• Subjects: Electron-donor -- Organic solar cells -- Triphenylamine; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tetlet.2015.05.103
• Languages: English
• ISSNs: 0040-4039

Abstract

Graphical abstract: Abstract: Three molecular donor (D) acceptor (A) systems of structure A–D–A–D–A as well as an A–D–D–A compound have been synthesized by spatial extension of reference D–A system containing a triphenylamine donor block (5 ). UV–Vis absorption spectroscopy, cyclic voltammetry and theoretical calculations show that the presence of a median acceptor group has limited effect on the internal charge transfer while direct dimerization leads to an increase of the effective conjugation length. A cursory evaluation of the new compounds as donor material in bilayer solar cells using fullerene C60 as the acceptor material shows that the presence of a median acceptor has deleterious effect on conversion efficiency while the simple dimerization of the molecule leads to a substantial improvement of the short-circuit current density and efficiency.