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Product Code M2246A1

COTIC-4F has a molecular configuration of A−D'−D−D'−A that is based on an electron rich internal core of cyclopentadithiophene (CPDT) as the central donor unit flanked with alkoxythienyl units, terminated with two 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (IC-2F) acceptor units.

COTIC-4F is a narrow bandgap n-type molecular semiconductors extending its absorption from 700 nm to near infrared range (about 1100 nm) with an optical bandgap of ~1.1 eV. COTIC-4F can be used as active layer material for near infrared (NIR) responsive organic solar cells (OSCs ) and organic photodetectors (OPDs ).

Chemical Structure

cotic-4f, nfas
Chemical structure of COTIC-4F

General Information

Purity >99% (1H NMR)
Form Dark blue powder/crystals
Solubility Chloroform, chlorobenzene
Full name 2,2'-((2Z,2'Z)-(((4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene-2,6-diyl)bis(4-(heptan-3-yloxy)thiophene-5,2-diyl))bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile
Synonyms COTIC-4F
Chemical formula C75H78F4N4O4S4
CAS number Not Available
Molecular weight 1303.73 g/mol
Absorption λmax 875 nm (solution); 975 nm (Film)
HOMO / LUMO HOMO = -5.26 eV, LUMO = -4.17 eV [1]
Classification / Family NFAs, n-type non-fullerene electron acceptors, Organic semiconducting materials, Low band-gap small molecule, Small molecular acceptor, Organic photovoltaics, Polymer solar cells, NF-PSCs.

MSDS Documentation



Batch Quantity Price
M2246A1 100 mg £380.00
M2246A1 250 mg £760.00
M2246A1 500 mg £1,300.00
M2246A1 1 g £2,400.00

Literature and Reviews

  1. Bandgap Narrowing in Non-Fullerene Acceptors: Single Atom Substitution Leads to High Optoelectronic Response Beyond 1000 nm, J. Lee et al., Adv. Energy Mater., 8 (24), 1801212 (2018); doi: 10.1002/aenm.201801212.
  2. Side Chain Engineering of Non Fullerene Acceptors for Near Infrared Organic Photodetectors and Photovoltaics, J. Lee et al., ACS Energy Lett., 4 (6); 1401–1409 (2019); DOI: 10.1021/acsenergylett.9b00721.
  3. Near-infrared organic photoelectric materials for light harvesting systems: Organic photovoltaics and organic photodiodes, B. Xie et al., InfoMat., 2, 57–91 (2020); DOI: 10.1002/inf2.12063.
  4. High brightness NIR-II nanofluorophores based on fused-ring acceptor molecules, X. Zhu et al., Nano Res., 13(9): 2570–2575 (2020); doi: 10.1007/s12274-020-2901-y.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.