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Product Code B651-250mg
Price $500 ex. VAT

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Two electron-donating 5-bromo-4-butyloctylthiophene units

Used in the synthesis of polymer D18.


D18-2Br has a rigid electron accepting dithienobezothiadiazole (DTBT) core with two electron-donating 5-bromo-4-butyloctylthiophene units. The large side alkyl chains are there to promote solubility for solution processing of the end products that acquire D18-2Br as building block.

D18-2Br has been used for the synthesis of polymer D18 which gave a PCE of 18.22% while Y6 was used as the non-fullerene acceptor.

General Information

CAS Number 2433725-51-8
Chemical Formula C42H54Br2N2S5
Molecular Weight 907.02 g/mol
Full Name 5,8-bis(5-bromo-4-(2-butyloctyl)thiophen-2-yl)dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2-c][1,2,5]thiadiazole
Synonyms DTBT-2Th48Br
Classification / Family Dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2-c][1,2,5]thiadiazole (DTBT) derivatives, Organic semiconducting materials, Semiconductor Synthesis, Low band gap polymers, OFETs, OLED, Organic Photovoltaics, NFA-OSCs.

Chemical Structure

d18-2br, CAS# 1639449-99-2
Chemical structure of D18-2Br, CAS 2433725-51-8

Product Details

Purity >98%
Melting Point N/A
Appearance Orange powder/crystal

MSDS Documentation

D18-2Br MSDS SheetD18-2Br MSDS sheet

Literature and Reviews

  1. Multi-channel exciton dissociation in D18/Y6 complexes for high-efficiency organic photovoltaics, Z. Cao et al., J. Mater. Chem. A, 8, 20408-20413 (2020); doi: 10.1039/D0TA07996K.
  2. 18% Efficiency organic solar cells, Q Liu et al., Sci. Bull. 65, 272 (2020); doi: 10.1016/j.scib.2020.01.001.
  3. Nonfullerene Acceptors: A Renaissance in Organic Photovoltaics? P. Meredith et al., Adv. Energy Mater., 10 (33); 2001788 (2020); doi: 10.1002/aenm.202001788.

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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