1648740-66-2Relevant academic research and scientific papers
Simple and versatile molecular donors for organic photovoltaics prepared by metal-free synthesis
Diac, Andreea,Demeter, Dora,Allain, Magali,Grosu, Ion,Roncali, Jean
, p. 1598 - 1608 (2015)
Donor-acceptor molecules (D-π -A) built by connecting a diphenylhydrazone block to a dicyanovinyl acceptor group via various thiophene-based π-conjugating spacers (1-5 ) were synthesized from mono- or dialdehydes by a simple metal-free procedure. Cyclic v
Small molecular donors for organic solar cells obtained by simple and clean synthesis
Demeter, Dora,Mohamed, Salma,Diac, Andreea,Grosu, Ion,Roncali, Jean
, p. 1046 - 1050 (2014/05/06)
A small donor-acceptor molecule is synthesized in a two-step procedure involving reaction of N,N-diphenylhydrazine on 2,5-diformylthiophene and Knoevenagel condensation. Results of UV/Vis absorption spectroscopy and cyclic voltammetry show that replacement of the phenyl ring bridge of a reference compound 2 by an azo group produces a slight red-shift of λ max, an enhancement of the molecular absorption coefficient, and a decrease of the energy level of the frontier orbitals. A preliminary evaluation of the potentialities of compound 1 as donor material in a basic bilayer planar heterojunction cell of 28 mm2 active area using C60 as acceptor gave a short-circuit current density of 6.32 mA cm-2 and a power conversion efficiency of 2.07 %. Keep it simple: A simple donor-acceptor molecule is synthesized from 2,5-thiophene dialdehyde using two condensation reactions with water as sole by-product. A 30 mm2 simple bilayer solar cell fabricated with a spun-cast film of donor and vacuum-deposited C 60 shows a power conversion efficiency >2.0 % under simulated solar light.
