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 M2278A1-100mg
Price £330 ex. VAT

PClTO2, eco-friendly green material with high device performance efficiencies

Low cost, high purity polymer available online for priority dispatch

Specifications | Pricing and Options | MSDS | Literature and Reviews

PClTO2 is an alternating copolymer with benzodithiophene (BDT) and thiophene carboxylate ester as the main backbone units. It has great solubility in the common solvents due to its simple structure.

PClTO2 can be used for highly efficient lower cost non-fullerene polymer solar cells (NF-PSCs) with the advantage of being able to be processed in eco-friendly non-halogenated solvents i.e. THF, o-xylene and 1,2,4-trimethylbenzene.

PClTO2 is first developed at Ossila as one of the green energy materials. Both PClTO2 and PTO2 are eco-friendly green energy materials and good replacements for PM6 and PTB7-Th with simpler structures at lower costs while maintaining high device performance efficiencies. No literature concerning PClTO2 or the same chemical structure was detected at the time of the product launch at Ossila.

Wide bandgap copolymer

Wide bandgap copolymer

For high efficient OPV applications



High purity, batch-specific GPC data, available larger batch orders and higher molecular weight

Worldwide shipping for PClTO2

Worldwide shipping

Quick and reliable shipping

Green energy material

Green energy materials

Processable in non-halogenated solvents

Please refer to our collection of green energy materials for non-halogenated solvents processing choice of non-fullerene acceptors (NFAs).

Luminosyn™ PClTO2

Luminosyn™ PClTO2 is now available.

High purity
PClTO2 is purified by Soxhlet extraction with methanol, hexane and chlorobenzene under an argon atmosphere

Batch-specific GPC data
Batch specific GPC data is always available for your thesis or publication

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

General Information

Full name Poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-chloro)thiophen-2-yl)-benzo[1,2-b:4,5-b’]dithiophene))-alt-(2,2-ethyl-3(or4)-carboxylate-thiophene)]
Synonyms PTO2-Cl
Chemical formula (C41H44Cl2O2S5)n
CAS number n.a.
HOMO / LUMO HOMO = -5.66 eV, LUMO = -3.41 eV (measured please see charaterisations)
Solubility THF, o-xylene, chloroform, chlorobenzene and dichlorobenzene
Processing solvent THF, o-xylene, chloroform, chlorobenzene
Classification / Family Organic semiconducting materials, Wide band-gap polymers, Organic Photovoltaics, Polymer solar cells, NF-PSCs, All-polymer solar cells (all-pscs), Clean energy materials.

Chemical Structure

PClTO2 structure and solubility
Chemical structure of PClTO2 and its solubility in THF and o-xylene.


UV-Vis Absorption

PClTO2 UV-Vis absorption in chlorobenzene and in film
UV-Vis absorption of of PClTO2 in chlorobenzene (CB) and in film (as-cast film on glass).

Cyclic Voltammetry

cyclic voltammetry study of pclto2
Cyclic voltammograms of the PClTO2 film on platinum electrode in 0.1M Bu4NClO4 in acetonitrile at a scan rate of 100 mV s−1.

The cyclic voltammograms (CV) measurements were recorded on Ossila Potentiostat by using a three-electrode system with platinum disc as the working electrode, platinum wire as the counter electrode, Ag/Ag+ electrode as the reference electrode with a scanning rate of 100 mV/s in a 0.1 M tetrabutylammonium perchloroate Bu4NClO4) solution. The potential of Ag/Ag+ reference electrode was internally calibrated by using ferrocene/ferroncenium (Fc/Fc+) as the redox couple.


Batch Quantity Price
M2278A1 100 mg £330
M2278A1 250 mg £660
M2278A1 500 mg £1150
M2278A1 1 g £2100
M2278A1 5 g / 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
M2278A1 73,405 27,972 2.62 In stock

MSDS Documentation


Literature and Reviews

  1. Achieving Over 15% Efficiency in Organic Photovoltaic Cells via Copolymer Design, Y. Cui et al., Adv. Mater., 31 (14), 1808356 (2019); DOI: 10.1002/adma.201808356.
  2. Wide bandgap polymer donors for high efficiency non-fullerene acceptor based organic solar cells, K. He et al., Mater. Adv., 2, 115 (2021); DOI: 10.1039/d0ma00790k.
  3. 14.7% Efficiency Organic Photovoltaic Cells Enabled by Active Materials with a Large Electrostatic Potential Difference, H. Yao et al., J. Am. Chem. Soc., 141, 19, 7743–7750 (2019); DOI: 10.1021/jacs.8b12937.
Return to the top