Benzodithiophene-based small molecules for vacuum-processed organic photovoltaic devices

Growth Dynamics of Ultrathin Films of Benzo[1,2-b:4,5-b’]dithiophene Derivatives on Au(111): A Photoelectron Spectroscopy Investigation

“…This allows one to produce ultrathin films of high purity and distinctive ordering, which can be fruitfully exploited in the fabrication of thin-film electronic devices. 6,12 In the present work, we have grown ultrathin films of a benzo[1,2-b:4,5-b']dithiophene derivative (BDT-COR) 13 on Au(111), by molecular beam epitaxy. BDT-COR is a BDT derivative of original synthesis where the BDT core is functionalized in the benzene para positions with 2methylbutyloxy side chains and in the thiophene alpha positions with thienyl spacers bearing electron acceptor acetyl groups.…”

“…Thiophene-based molecules, and in particular benzodithiophene (BDT) derivatives, are recognized as important organic semiconductors for (opto)­electronic devices and for photovoltaic energy conversion, thanks to their easy chemical synthesis, good fabricability in solid state, good electrical transport efficiency, electro-optical properties (light absorption and emission and excitonic effects), and good stability when exposed to environmental conditions. − Electronic structure such as the energy value of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), as well as electron or hole doping, optical properties, molecular packing in the solid state, and molecular ordering can be tailored, thanks to functionalization with appropriate chemical groups. The conjugated main core of BDT determines the position of the Frontier molecular orbitals.…”

“…The addition of alkoxy chains or conjugated groups bound to the two benzenic para positions and/or the modification of the terminal groups along the BDT longitudinal axis, apart modifying the electronic structure, can contribute sizably to molecular solubilization as well as molecular packing and film morphology in the solid state. ,− Besides this, these molecules appear to be quite stable and appropriate for thermal evaporation under controlled conditions. This allows one to produce ultrathin films of high purity and distinctive ordering, which can be fruitfully exploited in the fabrication of thin-film electronic devices. , …”

“…This allows one to produce ultrathin films of high purity and distinctive ordering, which can be fruitfully exploited in the fabrication of thin-film electronic devices. 6 , 12 …”

New Benzotriazole and Benzodithiophene-Based Conjugated Terpolymer Bearing a Fluorescein Derivative as Side-Group: In-Ternal Förster Resonance Energy Transfer to Improve Organic Solar Cells

“…How can we take these two approaches to produce new high-performance materials and devices? BDT is a widely used electron-donor building-block due to its structural versatility and excellent optical and transport properties, capable of producing high-performance CPs [ 20 , 35 , 36 ]. Among the electron-acceptor moieties, 2 H -benzo[ d ][1,2,3]triazole (BTz) has been extensively used for photovoltaic applications [ 37 , 38 , 39 ].…”