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Product Code B371

1,3-Bis(5-bromothiophen-2-yl)-5,7-bis(2-ethylhexyl)benzo[1,2-c:4,5-c']dithiophene-4,8-dione, or BDD, is an electron deficient building block which can be used for the synthesis of low band-gap polymer semiconductors such as PBDB-T (PCE12). With two side-branched side chains, the structure is more soluble and polymers more easily processible for device fabrications.

BDD has been used to great success in our own lab for the synthesis of high-performance OPV polymer semiconductor PCE12 (PBDB-T).

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General Information

CAS number 1415929-78-0
Chemical formula C34H38S4O2Br2
Molecular weight 766.73 g/mol
Synonyms BDD, 1,3-Bis(2-ethylhexyl)-5,7-di(bromothiophen-2-yl)benzo[1,2-c:4,5-c′]-dithiophene-4,8-dione, DiEH-Benzodithiophene-dione-2Th-2Br
Classification / Family Thiophene, Fused thiophene, Semiconductor synthesis intermediates, Low band gap polymers, OFETs, Organic photovoltaics, polymer solar cells

Chemical Structure

pce12 monomer
Chemical structure of BDD

Product Details

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

MSDS Documentation


Literature and Reviews

  1. Design, Application, and Morphology Study of a New Photovoltaic Polymer with Strong Aggregation in Solution State, D. Qian et al., Macromolecules, 45, 9611−9617 (2012); DOI: 10.1021/ma301900h.
  2. Fullerene-Free Polymer Solar Cells with over 11% Effi ciency and Excellent Thermal Stability, W. Zhao et al., Adv. Mater., 28, 4734–4739 (2016); DOI: 10.1002/adma.201600281.
  3. Energy-Level Modulation of Small-Molecule Electron Acceptors to Achieve over 12% Efficiency in Polymer Solar Cells, S. Li et al, Adv. Mater., 28, 9423–9429 (2016); DOI: 10.1002/adma.201602776.
  4. Ternary Polymer Solar Cells based on Two Acceptors and One Donor for Achieving 12.2% Efficiency, W. Zhao et al., Adv. Mater., (2016); DOI: 10.1002/adma.201604059.

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.