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Product Code M2246A1-100mg
Price $500 ex. VAT

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COTIC-4F, NFA for responsive organic solar cells and organic photodetectors

Narrow bandgap n-type semiconductor with absorption range near infrared, available to buy online

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 ).

High efficient non-flullerene acceptor

High efficient non-flullerene acceptor

with highly conjugated core

Wide absorption range into near infrared region

Wide absorption range into near infrared region

Absorption upto 1100 nm

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High purity

High purity

>99% High purity

Chemical Structure

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

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.

General Information

CAS Number N/A
Chemical Formula C75H78F4N4O4S4
Purity >99% (1H NMR)
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-(2-ethylhexyloxy)thiophene-5,2-diyl))bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile
Molecular Weight 1303.73 g/mol
Absorption λmax 875 nm (in chloroform); 990 nm (Film)
HOMO / LUMO HOMO = -5.26 eV, LUMO = -4.17 eV [1]
Solubility Chloroform, chlorobenzene
Form Dark blue powder/crystals
Synonyms COTIC-4F
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 £400
M2246A1 250 mg £800
M2246A1 500 mg £1400
M2246A1 1 g £2500

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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