Benzodithiophene-2THBr-4EH
CAS Number 1439937-07-1
Chemistry Building Blocks, Dibromo Monomers, Heterocyclic Building Blocks, Monomers
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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

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

MSDS Documentation
Benzodithiophene-2THBr-4EH MSDS sheet
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.
To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.