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 M0211A2-100mg
Price £400 ex. VAT

PTB7, for a quick and easy method to improve device efficiencies

High purity polymer available online for fast, secure dispatch

Overview | Specifications | Pricing and Options | MSDS | Literature and Reviews

PTB7 (CAS number 1266549-31-8) gives some of the highest reported efficiencies for polymer:fullerene solar cells due to its extended absorption into the near infra-red and lower HOMO level. Together with our complete package of processing information, PTB7 becomes a quick and easy way to improve device efficiencies. This represents a cost-effective method to increase performance and impact of devices and data for a wide range of OPV related research.

At typical concentrations for spin-coated devices of 10 mg/ml, a standard batch of 100 mg will produce 10 ml of ink - enough to coat 200 of Ossila's standard sized substrates even assuming 50% ink loss during preparation and filtration. At concentrations of 1 mg/ml (more typical for ink-jet printing and spray coating) up to 100 ml of ink can be produced.

In a standardised reference architecture (using a PEDOT:PSS hole interface and Ca/Al electron interface) we have shown this batch to give a PCE of 6.8% (see data sheet below) and up to 7.4% using PFN. By using new interface materials and architectures PTB7 has been shown to reach efficiencies of 9.2% PCE in the literature [1,2].

The high solubility in a wide range of solvents makes ink preparation and filtration simple, and PTB7 is one of the easiest materials we have ever worked with (simply shake it to dissolve). This also makes it an excellent candidate for a variety of coating techniques including ink-jet printing, spray coating and blade coating.

PTB7 from Ossila was used in a high impact paper (IF 46.5)

PTB7 from Ossila was used in the high-impact paper (IF 46.5), Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%, N. Gasparini et al., Nat. Energy 16118 (2016); DOI: 10.1038/nenergy.2016.118.

For information on processing please see our specific fabrication details for PTB7, general fabrication video, general fabrication guide, optical modelling paper on our standard architecture [3], or email us for any additional help and support.

Luminosyn™ PTB7

Luminosyn™ PTB7 is now available.

High molecular weight and high purity
PTB7 is purified by Soxhlet extraction with methanol, hexane and chlorobenzene 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 [[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl ]]
Synonyms PTB7
CAS number 1266549-31-8
Absorption* 670 nm (CH2Cl2), 682 nm (film)
Solubility Chloroform, Chlorobenzene, Dichlorobenzene

* Measurable with an Optical Spectrometer, see our spectrometer application notes.

Chemical Structure

PTB7 chemical structure
Chemical structure of PTB7; Chemical formula (C41H53FO4S4)n.


Batch Quantity Price
M0211A 100 mg £400
M0211A 250 mg £800
M0211A 500 mg £1300
M0211A 1 g £2400

Batch Information

Batch No. Mw PDI Stock Info
M211 18,000 1.75 Discontinued
M212 > 40,000 2.0 Discontinued
M213 85,000 2.0 Discontinued
M214 322,236 4.12 Discontinued
M215 125,821 2.02 Discontinued
M216 78,852 2.62 Discontinued
M0211A1 234,770
2.82 Discontinued
M0211A2 162,082 3.86 In stock

*New batch coming soon.

MSDS Documentation


Literature and References

  1. Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure Zhicai He et al., Nature Photonics, V 6, p591–595 (2012).
  2. Simultaneous Enhancement of Open-Circuit Voltage, Short-Circuit Current Density, and Fill Factor in Polymer Solar Cells Zhicai He et al., Advanced Materials, V 23, p4636–4643 (2011).
  3. Optimising the efficiency of carbazole co-polymer solar-cells by control over the metal cathode electrode Darren C. Watters et al., Organic Electronics, V 13, p1401–1408 (2012)
Return to the top