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Product Code B531-500mg
Price $550 ex. VAT

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

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

Specifications | MSDS | Literature and Reviews

2,6-bis(trimethytin)-4,8-bis(5-(2-ethylhexyl)-4-chlorothiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene (BDTT-Cl-Sn, CAS number 2239295-69-1) is an electron-rich building block used for the synthesis of either small molecular donors or low band-gap polymer semiconductors (like PBDB-T-2Cl) for highly-efficient OSCs and OPV applications.

It is believed that electron density can be delocalised more effectively to the halogen atom in Th-Cl than in Th-F. Also bearing two ethylhexyl side chains, with fused thiophenes and thiophenes as electron-rich pendants, BDTT-Cl-Sn offers good solubility for the targeted materials.

General Information

CAS Number 2239295-69-1
Chemical Formula C40H56Cl2S4Sn2
Molecular Weight 973.46 g/mol
Full Name 2,6-bis(trimethytin)-4,8-bis(5-(2-ethylhexyl)-4-chlorothiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene
  • 4,8-Bis(5-(2-ethylhexyl)-4-chlorothiophen-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-Cl-Sn structure
Chemical structure of BDTT-Cl-Sn

Product Details

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

MSDS Documentation


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. Chlorine substituted 2D-conjugated polymer for high-performance polymer solar cells with 13.1% efficiency via toluene processing, Q. Fan et al., Nano Energy 48, 413–420 (2018); doi: 10.1016/j.nanoen.2018.04.002.
  3. Fluorination vs. chlorination: a case study on high performance organic photovoltaic materials, Y. Zhang et al., Sci. China Chem., 61 (10), 1328–1337 (2018); doi: 10.1007/s11426-018-9260-2.
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