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BDTTDSFSn chemical structure

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2,6-bis(trimethytin)-4,8-bis(5-(2-ethylhexylthio)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene (BDTTDSFSn) is an electron-rich building block that has been used for the synthesis of small molecules and low band-gap polymer semiconductors for highly efficient OSCs and OPV applications.

Bearing two ethylhexyl thioalkyl side chains, with fused thiophenes and thiophenes as electron-rich pendants, BDTTDSFSn offers good solubility for the targeted compounds. The introduction of the fluoro atoms on the side thiophene rings can also lower the HOMO/LUMO energy levels of the desired polymers.

General Information

CAS number 2226464-70-4
Chemical formula C40H56F2S6Sn2
Molecular weight 1004.68 g/mol
Full name 2,6-bis(trimethytin)-4,8-bis(5-(2-ethylhexylthio)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene
  • BDT-SF-Sn
  • PCE13 monomer
  • (4,8-Bis(5-(2-ethylhexylthio)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene-2,6-diyl)bis(trimethylstannane) 
Classification / Family Thiophene, Fused thiophene, Benzo-dithiophene heterocylic aromatics, Five-membered ring, Semiconductor synthesis intermediates, Low band-gap polymers, OFETs, Organic photovoltaics, Polymer solar cells

Chemical Structure

BDTTDSFSn chemical structure, 2226464-70-4
Chemical structure of BDTTDSFSn

Product Details

Purity >99% (by HPLC)
Melting point n/a
Appearance Light yellow crystals

MSDS Documentation


Literature and Reviews

  1. Molecular Optimization Enables over 13% Efficiency in Organic Solar Cells, W. Zhao at al., J. Am. Chem. Soc., 139 (21), 7148–7151 (2017); DOI: 10.1021/jacs.7b02677.
  2. Enhancing Indacenodithiophene Acceptor Crystallinity via Substituent Manipulation Increases Organic Solar Cell Efficiency, T. J. Aldrich et al, Chem. Mater., 29(24), 10294-10298 (2017); DOI: 10.1021/acs.chemmater.7b04616.
  3. A Large‐Bandgap Conjugated Polymer for Versatile Photovoltaic Applications with High Performance, M. Zhang et al., Adv. Mater., 27, 4655–4660 (2015); DOI: 10.1002/adma.201502110.

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.

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