1,3-Bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)-5,7-bis(2-ethylhexyl)benzo[1,2-c:4,5-c']dithiophene-4,8-dione is a monomer for the synthesis of polymer semiconductors which have applications in OPV (fullerene or fullerene-free), tandem organic solar cells, and OFETs.
|Classification / Family
||Thiophene, Fused thiophene, Benzodithiophene dione, Semiconductor synthesis intermediates, Low band gap polymers, OFETs, Organic photovoltaics, Polymer solar cells
||> 98% (by 1H-NMR in CDCl3)
1,3-Bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)-5,7-bis(2-ethylhexyl)benzo[1,2-c:4,5-c']dithiophene-4,8-dione, or Benzodithiophene-2THBr-4EH, is electron-deficient and used for the synthesis of low band-gap polymer semiconductors in organic electronics applications, such as PBDD4T and PBDD4T-2F.
It has a more soluble structure due to its four branched side chains, so resulting polymers can be more easily processed for device fabrications.
Literature and Reviews
A Fluorinated Polythiophene Derivative with Stabilized Backbone Conformation for Highly Efficient Fullerene and Non-Fullerene Polymer Solar Cells, S. Zhang et al., Macromolecules, 49 (8), 2993–3000 (2016); DOI: 10.1021/acs.macromol.6b00248.
Achieving 12.8% Efficiency by Simultaneously Improving Open-Circuit Voltage and Short-Circuit Current Density in Tandem Organic Solar Cells, Y. Qin et al., Adv. Mater. 2017, 29, 1606340 (2017); DOI: 10.1002/adma.201606340.