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CAS Number 2328092-51-7

Materials, Non-Fullerene Acceptors

Product Code M2340A1-100mg
Price £400 ex. VAT

COTIC-4Cl, used to extend spectral response in organic photodiodes

Ultra-narrow bandgap n-type semiconductor with NIR absorption, available to buy online

Specifications | Pricing and Options | MSDS | Literature and Reviews

COTIC-4Cl (CAS number 2328092-51-7) has a chemical structure containing an electron rich cyclopentadithiophene (CPDT) as the central donor unit flanked with alkoxythienyl units and two 2-(5,6-dichloro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (IC-2Cl) accepting peripheral units.

Compared to COTIC-4F, COTIC-4Cl film has an absorption that extends to near infrared (NIR) and exhibits broad absorption with a strong absorption band, which ranges from 600 to about 1400 nm. COTIC-4Cl is a ultra-narrow bandgap n-type semiconductor with an optical bandgap of ~ 1.0 eV.

COTIC-4Cl can be used for organic photodiodes to extend the spectral response range over 1000 nm. Ternary organic photodiodes photodiodes based on PCE10:COTIC-4Cl:PC71BM as active layer materials exhibited a high specific detectivity (D*) of 5 × 1012 Jones and a responsivity (R) of 0.30 A W-1 at 1100 nm.

High efficient non-flullerene acceptor

High efficient non-flullerene acceptor

with highly conjugated core

Narrow bandgap n-type semiconductor

Narrow bandgap n-type semiconductor

optical bandgap of ~1.0 eV

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High purity

High purity

>98% High purity

General Information

CAS Number 2328092-51-7
Chemical Formula C75H78Cl4N4O4S4
Purity >98% (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-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile
Molecular Weight 1369.52 g/mol
Absorption λmax 873 nm (in CB); 1005 nm (in film), 600 - 1400 nm >
HOMO / LUMO HOMO = -5.24 eV, LUMO = -4.02 eV, Eg, opt> = 0.99 eV [1]>
Solubility Chloroform, chlorobenzene
Form Black deep-blue powder/crystals
Synonyms COTIC-4Cl
Classification / Family NFAs, n-type non-fullerene electron acceptors, Organic semiconducting materials, Low band-gap small molecule, Small molecular acceptor, Organic photovoltaics, Organic photodiodes (OPDs), NF-PSCs.

Chemical Structure

cotic-4cl chemical structure, cas# 2328092-51-7
Chemical structure of COTIC-4Cl, CAS 2328092-51-7


Batch Quantity Price
M2246A1 100 mg £400
M2246A1 250 mg £800
M2246A1 500 mg £1400
M2246A1 1 g £2500

MSDS Documentation


Literature and Reviews

  1. Ternary organic photodiodes with spectral response from 300 to 1200 nm for spectrometer application, Z. Zhong et al., Sci. China Mater., 64(10): 2430–2438 (2021);  DOI: 10.1007/s40843-020-1639-x..
  2. 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.
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