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Product Code M303-100mg
Price £400 ex. VAT

PCE11, highly efficient semiconducting polymer for OPVs

Excellent hole transport mobilities and available online for fast, secure dispatch

Specifications | Pricing and Options | MSDS | Literature and Reviews

PffBT4T-2OD (PCE11), CAS number 1644164-62-4, is a low band-gap (1.65 eV) semiconducting polymer for organic photovoltaics (OPVs), which has reached power conversion efficiencies (PCEs) approaching 11% [1]. These efficiencies are a result of the high crystallinity of the polymer, providing excellent hole transport mobilities on the order of 10-2 cm2V-1s-1, and the ability to use a thick active layer, resulting in improved light absorption.

The size and position of the alkyl chains of PffBT4T-2OD are critical to its temperature dependant aggregation properties, enabling control over the aggregation and crystallisation of the polymer to produce an efficient donor:acceptor film morphology.

PCE11 (PffBT4T-2OD) from Ossila was used in a high-impact paper (IF 14.92)

PCE11 (PffBT4T-2OD) from Ossila was used in the high-impact paper (IF 14.92), High-efficiency and air-stable P3HT-based polymer solar cells with a new non-fullerene acceptor, S. Holliday et a., Nat. Commun., 11585 (2016); DOI: 10.1038/ncomms11585.

Polymer PCE11 was targeted by reacting 4,7-bis(5-bromo-4-(2-octyldodecyl)thiophen-2-yl)-5,6-difluorobenzo[c][1,2,5]-thiadiazole with 2,5-bis(trimethylstannyl)thieno[3,2-b]thiophene engaging Stille Coupling reaction.

pce11-pffbt4t-2od-synthesis 4,7-bis(5-bromo-4-(2-octyldodecyl)thiophen-2-yl)-5,6-difluorobenzo[c][1,2,5]-thiadiazole with 2,5-bis(trimethylstannyl)thieno[3,2-b]thiophene
PCE11 (PffBT4T-2OD) synthesis with 4,7-bis(5-bromo-4-(2-octyldodecyl)thiophen-2-yl)-5,6-difluorobenzo[c][1,2,5]-thiadiazole with 2,5-bis(trimethylstannyl)thieno[3,2-b]thiophene as starting materials engaging Stille Coupling reaction.

General Information

Full name Poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3’’’-di(2-octyldodecyl)-2,2’;5’,2’’;5’’,2’’’-quaterthiophen-5,5’’’-diyl)]
Synonyms PffBT4T-2OD
Chemical formula (C62H88F2N2S5)n
CAS number 1644164-62-4
HOMO / LUMO HOMO = -5.34 eV, LUMO = -3.69 eV [1]
Solubility/processing solvents Dichlorobenzene or Chlorobenzene+dichlorobenzene (1:1 v/v) at elevated temperature ca. 110 °C
Classification / Family Benzothiadiazole, Fluorinated benzothiadiazole, Heterocyclic five-membered ring, Organic semiconducting materials, Low band gap polymers, Organic Photovoltaics, Polymer Solar Cells

Chemical Structure

PffBT4T-2OD chemical structure
Chemical structure and product image of PCE11 (PFFBT4T-2OD)

Device Structure(s)

The structure of the high-performance (10 - 11%) devices was:

ITO / ZnO / PffBT4T-2OD:PC70BM (200 – 300 nm) / MoO3 or V2O5 (20 nm) / Al (100 nm)

PffBT4T-2OD:PC70BM solution details:

  • Blend ratio: 1:1.2,
  • Polymer concentration: 9 mg/ml,
  • Solvent: 1:1 blend of chlorobenzene and dichlorobenzene,
  • Additive: 3% diiodooctane,
  • Heating: 85°C for dissolution,

It is important to note that this solution (and the substrate being deposited onto) must be heated for spin casting, with the ideal temperature being 60 – 80°C. It is reported that a solution and substrate pre-heating temperature of 110°C should be used to allow for cooling that will occur before deposition.


Batch Quantity Price
M303 100 mg £400
M303 250 mg £760
M303 500 mg £1400
M303 1 g £2200
M303 2 g £4000
M303 5 - 10 g* Please enquire

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

Batch details

Batch number MW MN PDI Stock Info
M301 117,490 54,900 2.14 Discontinued
M302 172,033 83,008 2.07 Discontinued
M303 112,707 55,674 2.02 In stock

MSDS Documentation

PCE11 (PffBT4T-2OD) MSDSPCE11 (PffBT4T-2OD) MSDS sheet

Literature and Reviews

  1. Aggregation and morphology control enables multiple cases of high-efficiency polymer solar cells, Y. Liu, et al., Nat. Comm., 5, 5293 (2014)
  2. High-efficiency non-fullerene organic solar cells enabled by a difluorobenzothiadiazole-based donor polymer combined with a properly matched small molecule acceptor, J. Zhao et al., Energy Environ. Sci., 8, 520-525 (2015)
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