CAS Number 2328092-51-7
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.
| 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 of COTIC-4Cl, CAS 2328092-51-7
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