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Materials, Non-Fullerene Acceptors

Product Code M2341A1-100mg
Price $438 ex. VAT

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

Available for priority dispatch with free shipping on qualifying orders

IEICO-4Cl, 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%.

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

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. 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, and may not be used for any other purpose including health care, military, pharmaceuticals, cosmetics, food, or commercial applications.

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