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 info@ossila.com, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


Product Code B521-500mg
Price $625 ex. VAT

Quality assured

Expert support

Volume discounts

Worldwide shipping

Fast and secure


High purity BDTT-F-Sn, for applications in highly efficient OSCs and OPVs

For the synthesis of small molecular donors and low band gap semiconducting polymers


2,6-bis(trimethytin)-4,8-bis(5-(2-ethylhexyl)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene (BDTT-FS-n), CAS number 1514905-25-9, is an electron-rich building block used for the synthesis of either small molecular donors or low band-gap polymer semiconductors (like PBDB-T-F) for highly-efficient OSCs and OPV applications.

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

Available to purchase up to 25 g. If you are ordering the item with quantity over 5 g please contact our customer care team for a lead time.

Capped with trimethyltin

Capped with trimethyltin

for facil coupling reactions

Worldwide shipping for 1514905-25-9

Worldwide shipping

Quick and reliable shipping

Fluorinated building block

Benzodithiophene building block

For semiconductors, OFETs, and solar cells

High purity 1514905-25-9

High purity

>98% High purity

General Information

CAS Number 1514905-25-9
Chemical Formula C40H56F2S4Sn2
Molecular Weight 940.55 g/mol
Full Name 2,6-bis(trimethytin)-4,8-bis(5-(2-ethylhexyl)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene
Synonyms
  • BDTTDFSn
  • 4,8-Bis(5-(2-ethylhexyl)-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

BDTT-F-Sn, 1514905-25-9
Chemical structure of BDTT-F-Sn, CAS 1514905-25-9

Product Details

Purity >98% (by 1H-NMR)
Melting Point N/A
Appearance Light yellow crystals

MSDS Documentation

BDTTDFSn MSDSBDTTDFSn MSDS Sheet

Literature and Reviews

  1. Over 14% Efficiency in Polymer Solar Cells Enabled by a Chlorinated Polymer Donor, S. Zhang et al., Adv.Mater., 30, 1800868 (2018); DOI: 10.1002/adma.201800868.
  2. Design of a New Small‐Molecule Electron Acceptor Enables Efficient Polymer Solar Cells with High Fill Factor, S. Li et al., Adv.Mater., 29, 1704051 (2017); DOI: 10.1002/adma.201704051.
  3. A High-Efficiency Organic Solar Cell Enabled by the Strong Intramolecular Electron Push–Pull Effect of the Nonfullerene Acceptor, W. Li et al., Adv.Mater., 30, 1707170 (2017); DOI: 10.1002/adma.201707170.

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