CAS Number 2328092-51-7
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COTIC-4Cl, used to extend spectral response in organic photodiodes
Ultra-narrow bandgap n-type semiconductor with NIR absorption, available to buy online
COTIC-4Cl 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
with highly conjugated core
Narrow bandgap n-type semiconductor
optical bandgap of ~1.0 eV
Quick and reliable shipping
>98% High purity
Literature and Reviews
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..
- 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.
|Purity||>98% (1H NMR)|
|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 >|
|Form||Black deep-blue powder/crystals|
|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.|
MSDS DocumentationCOTIC-4Cl MSDS Sheet
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.