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CAS Number 2240998-88-1

Materials, Non-Fullerene Acceptors

Product Code M2341A1-100mg
Price £350 ex. VAT

IEICO-4Cl, low bandgap NFA with absorption into the near-infrared

Available for priority dispatch with free shipping on qualifying orders

IEICO-4Cl (CAS number 2240998-88-1), a chlorinated version of IEICO-4F, has a structure with an electron-donating fused indaceno[1,2-b:5,6-b′]dithiophene (IDT) core flanked by two electron-withdrawing terminals, 2-(5,6-dichloro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (IC-2Cl). IEICO-4Cl has an ultralow bandgap of 1.23 eV with weak absorption in the visible region, but extends its main absorption into the near-infrared (NIR) region (745-945 nm) with maximum absorption around 880 nm and an absorption onset of ≈1010 nm.

Organic tandem solar cell with PBDB-TF:IT-4F as active layer for the front cell and PTB7-Th:IEICO-4Cl:PC71BM as active layer for the real cell gained a power conversion efficiency (PCE) of 15.26%.

High efficient non-flullerene acceptor

High efficient non-flullerene acceptor

with highly conjugated core

Expanded absorption range to near infrared

Expanded absorption range to near infrared

Large dipole moment induced by chloride substituents

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High purity

High purity

>99% High purity

Device structure: ITO/TIPD/PBDB-TF:IT-4F/m-PEDOT/TIPD/PTB7-Th:IEICO-4Cl:PC71BM/MoO3/Ag

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
105/150 nm 1.58 14.36 67.27 15.26

Our high purity (>99%) IEICO-4Cl is available for priority dispatch (lead times may apply for large quantities) and ships free with qualifying orders.

Chemical Structure

Chemical structure of IEICO-4Cl
Chemical structure of IEICO-4Cl

Literature and Reviews

  1. Efficient Semitransparent Organic Solar Cells with Tunable Color enabled by an Ultralow-Bandgap Nonfullerene Acceptor, Y. Cui et al., Adv. Mater., 29 (43), 1703080 (2017); DOI: 10.1002/adma.201703080.
  2. Efficient Organic Tandem Solar Cells Enabled by Solution-Processed Interconnection Layer and Fine-Tuned Active Layer, R. Zeng et al., Adv. Optical Mater., 9 (21), 2101246 (2021); DOI: 10.1002/adom.202101246.
  3. Nonfullerene Acceptors for Semitransparent Organic Solar Cells, S. Dai et al., Adv. Energy Mater., 1800002 (2018); DOI: 10.1002/aenm.20180000.
  4. π-Conjugated Polymers and Molecules Enabling Small Photon Energy Loss Simultaneously with High Efficiency in Organic Photovoltaics, M. Saito et al., J. Mater. Chem. A, 8, 20213-20237 (2020); DOI: 10.1039/D0TA05108J.
  5. Thermodynamic Properties and Molecular Packing Explain Performance and Processing Procedures of Three D18:NFA Organic Solar Cells, Z. Wang et al., Adv. Mater., 32 (49), 2005386 (2020); DOI: 10.1002/adma.202005386.

General Information

CAS Number 2240998-88-1
Chemical Formula C114H114Cl4N4O4S4
Purity >99% (1HNMR)
Full Name 2,2′-((2Z,2′Z)-(((4,4,9-tris(4-hexylphenyl)-9-(4-pentylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b dithiophene-2,7-diyl)bis(4-((2-ethylhexyl)oxy)thiophene 5,2-diyl))bis(methanylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile
Molecular Weight 1874.22 g/mol
Absorption λmax 802 nm (in chloroform), 887 nm (in film), NIR absorption
HOMO / LUMO HOMO = -5.56 eV, LUMO = -4.23 eV; Eg = 1.33 eV [1]
Solubility Chloroform, chlorobenzene
Form Dark blue powder/crystals
Synonyms IEICO-Cl
Classification / Family NFAs, n-type non-fullerene electron acceptors, organic semiconducting materials, low band-gap small molecule, small molecular acceptor, organic photovoltaics, organic photodetectors (OPDs), polymer solar cells, NF-PSCs

MSDS Documentation



Batch Quantity Price
M2341A1 100 mg £350
M2341A1 250 mg £700
M2341A1 500 mg £1250
M2341A1 1 g £2200
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