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Product Code B371-500mg
Price $300 ex. VAT

BDD, for the synthesis of high performance OPV polymer semiconductors

High quality and high purity monomer available online


Specifications | MSDS | Literature and Reviews


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, CAS number 1415929-78-0, 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 more easily processable for device fabrications.

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

If you are ordering the item with quantity over 5 g please contact our customer care team for a lead time.

Capped with bromide

Capped with bromide

A PCE12 monomer

Benzodithiophene-dione building block

Benzodithiophene-dione building block

For semiconductors, OFETs, and solar cells

Worldwide shipping for 1415929-78-0

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High purity 1415929-78-0

High purity

>98% High purity

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


BDD MSDSBDD MSDS Sheet

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.
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