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PCE11 (PffBT4T-2OD)

Product Code M303
Price $450.00 ex. VAT

PCE11, highly efficient semiconducting polymer for OPVs

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

PffBT4T-2OD (PCE11) 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.

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)

MSDS Documentation

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


Batch Quantity Price
M303 100 mg £360
M303 250 mg £700
M303 500 mg £1250
M303 1 g £2000
M303 2 g £3700
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

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, military, pharmaceuticals, cosmetics, food, or commercial applications.

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