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Product Code B381-500mg
Price £440 ex. VAT

Benzodithiophene-2THBr-4EH, high purity monomer for applications in OPVs and OFETs

For the synthesis of low band-gap polymer semiconductors

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 low 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

Chemical Structure

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

Product Details

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


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

MSDS Documentation

MSDSBenzodithiophene-2THBr-4EH MSDS sheet

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.
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