Product Code B381
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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 a monomer for the synthesis of ow band-gap polymer semiconductors such as PBDD4T and PBDD4T-2F. It has applications in OPV (fullerene or fullerene-free), tandem organic solar cells, and OFETs.

Benzodithiophene-2THBr-4EH has a more soluble structure due to its four branched side chains, so resulting polymers can be more easily processed for device fabrications.

General Information

CAS number 1439937-07-1
Chemical formula C50H70Br2O2S4
Molecular weight 991.16 g/mol
Synonyms 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
Classification / Family Thiophene, Fused thiophene, Benzodithiophene dione, Semiconductor synthesis intermediates, Low band gap polymers, OFETs, Organic photovoltaics, Polymer solar cells

Product Details

Purity > 98% (by 1H-NMR in CDCl3)
Melting point n/a
Appearance Yellowish-orange powder/crystals

Chemical Structure

Benzodithiophene-2THBr-4EH, 1439937-07-1
Chemical Structure of Benzodithiophene-2THBr-4EH


1H NMR 1439937-07-1, Benzodithiophene-2THBr-4EH
1H-NMR of Benzodithiophene-2THBr-4EH in CDCl3

MSDS Documentation


Literature and Reviews

  1. 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.
  2. 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.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.