COTIC-4F

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

with highly conjugated core

Wide absorption range into near infrared region

Absorption upto 1100 nm

Worldwide shipping

Quick and reliable shipping

High purity

>99% High purity

Chemical Structure

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

Literature and Reviews

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.
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.
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.
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	λ_max 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