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PCE11 (PffBT4T-2OD) 英國Ossila CAS:1644164-62-4

產品簡介:PCE11 (PffBT4T-2OD) 英國Ossila CAS:1644164-62-4
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PCE11 (PffBT4T-2OD) 英國Ossila CAS:1644164-62-4

General Information

Full namePoly[(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)]
SynonymsPffBT4T-2OD
Chemical formula(C62H88F2N2S5)n
CAS number1644164-62-4
HOMO / LUMOHOMO = -5.34 eV, LUMO = -3.69 eV [1]
Classification / Family

Benzothiadiazole, Fluorinated benzothiadiazole, Heterocyclic five-membered ring, Organic semiconducting materials, Low band gap polymers, Organic Photovoltaics, Polymer Solar Cells

Batch details

Batch numberMWMNPDIStock Info
M301117,49054,9002.14Low in stock
M302172,03383,0082.07Low In stock

 Note: Processing solvents for M301 is chlorobenzene (CB) and dichlorobenzene (DCB, v/v = 1:1) and M302 is DCB.

Characterisation


Molecular weight distribution of PCE11 chlorobenzene Soxhlet fraction by GPC. (Soxhlet extraction was carried out by using methanol, acetone, hexane and then chlorobenzene as washing solvents under argon. Chlorobenzene fraction was concentrated and then precipitated with methanol, dried under vacuum at 40 oC for 48 hours. GPC was carried out by using 1,2,4-trichlorobenzene as eluent at 140 oC by using polystyrene as standards).

PCE11 (PffBT4T-2OD) 英國Ossila CAS:1644164-62-4

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 10-2cm2V-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.

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.

Usage Details

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.

PCE11 (PffBT4T-2OD) 英國Ossila CAS:1644164-62-4

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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