FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


BDTTDSFSn chemical structure

This product has been discontinued

Related Categories:

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.

Capped with trimethyltin

Capped with trimethyltin

for facil coupling reactions

Worldwide shipping for 2226464-70-4

Worldwide shipping

Quick and reliable shipping

Fluorinated building block

Benzodithiophene building block

for semiconductors, OFETs, and solar cells

High purity 2226464-70-4

High purity

>98% High purity

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.

Return to the top