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.

Product Code M2049A1-100mg
Price £420 ex. VAT

PBT1, for highly efficient OPV devices

High purity and available online for priority dispatch

Specifications | Pricing and Options | MSDS | Literature and Reviews

As a family member of polythiophenes, PBT1 (also known as PBDD4T), CAS number 1439937-09-3, has a backbone consisting of repeating benzodithiophene-4,8-dione and α-quaterthiophene units. π electrons can be delocalized effectively through the alternative electron push−pull effect, resulting a low band-gap polymer. Also, with four ethylhexyl branched side chains, the polymer is more soluble in most of organic solvents.

We also have PBDD4T-2F available which allows fluorine-fluorine interaction at the polymer back-bone structure for device film morphology control. Both PBDD4T and PBDD4T-2F are used for highly efficient OPV devices using fullerenes and non-fullerenes such as ITIC and P(NDI2OD-T2F) as acceptors.

Luminosyn™ PBT1

Luminosyn™ PBT1 is now available.

High purity and high molecular weight
PBDD4T is purified by Soxhlet extraction with methanol, hexane and chloroform under an argon atmosphere

Batch-specific GPC data
Have confidence in what you are ordering; batch-specific GPC data for your thesis or publications

Large quantity orders
Plan your experiments with confidence with polymers from the same batch

General Information

Full name Poly[[5,​7-​bis(2-​ethylhexyl)​-​4,​8-​dioxo-​4H,​8H-​benzo[1,​2-​c:4,​5-​c']​dithiophene-​1,​3-​diyl]​[3,​3'''-​bis(2-​ethylhexyl)​[2,​2':5',​2'':5'',​2'''-​quaterthiophene]​-​5,​5'''-​diyl]​]
Synonyms PBT1, BDD4T
Chemical formula (C58H74O2S6)n
CAS number 1439937-09-3
Solubility Chloroform, chlorobenzene and dichlorobenzene (solution processing solvent chlorobenzene or dichlorobenzene)
HOMO / LUMO HOMO = -5.30 eV, Eg = 1.76 eV [1]
Classification / Family Polythiophenes, Organic n-type semiconducting materials, Organic photovoltaics, Polymer solar cells, Tandem solar cells, Electron-acceptor polymers, OFETs, Perovskite solar cells, All-polymer solar cells.
Solubility Soluble in chloroform, chlorobenzene, dichlorobenzene

Chemical Structure

pbdd4t, PBT1, BDD4T chemical structure
Chemical structure and product image of PBDD4T


Batch Quantity Price
M2049A1 100 mg £420
M2049A1 250 mg £800
M2049A1 500 mg £1450
M2049A1 1 g £2600
M2049A1 5 - 10 g* Please enquire

*for 5-10 grams order quantity, the lead time is 4-6 weeks.

Batch details

Batch Mw Mn PDI Stock Info
M2049A1 112,851 49,310 2.29 in stock

MSDS Documentation


Literature and Reviews

  1. A Fluorinated Polythiophene Derivative with Stabilized Backbone Conformation for Highly Efficient Fullerene and Non-Fullerene Polymer Solar Cells, S. Zhang et al., Macromolecules, 49 (8), 2993–3000 (2016); DOI: 10.1021/acs.macromol.6b00248.
  2. Molecular Design toward Efficient Polymer Solar Cells with High Polymer Content, D. Qian et al., J. Am. Chem. Soc., 2013, 135 (23), 8464–8467 (2013); DOI: 10.1021/ja402971d.
  3. Toward reliable and accurate evaluation of polymer solar cells based on low band gap polymers, L. Ye et al., J. Mater. Chem. C, 3, 564-569 (2015); DOI: 10.1039/C4TC02449D.
Return to the top