Pricing
Batch Quantity Price
M303
100 mg
£296.00
M303 250 mg
£591.00
M303 500 mg
£1030.00
M303 1 g
£1650.00
M303 2 g
£3100.00
M303 5 - 10 g*
Please enquire
*for 5 - 10 grams order quantity, the lead time is 4-6 weeks.
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 (C62 H88 F2 N2 S5 )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
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
Chemical structure and product image of PCE11 (PFFBT4T-2OD); Chemical formula: (C62 H88 F2 N2 S5 )n.
Applications
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 cm2 V-1 s-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.
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 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.
Usage Details
The structure of the high-performance (10 - 11%) devices was:
ITO / ZnO / PffBT4T-2OD:PC70 BM (200 – 300 nm) / MoO3 or V2 O5 (20 nm) / Al (100 nm)
PffBT4T-2OD:PC70 BM 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
Aggregation and morphology control enables multiple cases of high-efficiency polymer solar cells , Y. Liu, et al., Nat. Comm., 5, 5293 (2014)
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)
