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Product Code M2298A1-100mg
Price $425 ex. VAT

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IO-4Cl, n-type non-fullerene acceptor

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Unlike most narrow bandgap non-fullerene acceptors (NFAs), IO-4Cl is a medium/wide bandgap n-type non-fullerene semiconductor bearing an electron rich indacenodithieno-[3,2-b]thiophene (also known as ITIC core). It has a similar structure to ITIC-4Cl, but the electron-accepting units are composed of two carbonyl units while ITIC-4Cl has one carbonyl group and one more electron-withdrawing malononitrile group.

IO-4Cl is relatively blue-shifted in absorption when compared to ITIC-4Cl, with an absorption band centred at 500 - 700 nm in the visible light region. IO-4Cl is known for indoor organic photovoltaic (IOPV) applications. When IO-4Cl:PM6 blend is used as the active layer materials, PCEs of over 26% under 1000 lux LED or FC have been achieved. The IOPVs photovoltaic cells maintained most of their initial PCE after 1000 hours under continuous indoor illumination with the following device structure [1].

Device structure: ITO/PEDOT:PSS/PBDB-T-2F (PM6):IO-4Cl/PFN-Br/Al

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
100 1.09 73.8 81.5 26.4

Chemical Structure

IO-4Cl chemical structure
Chemical structure of IO-4Cl, a wide bandgap non-fullerene acceptor

Literature and Reviews

  1. Wide-gap non-fullerene acceptor enabling high-performance organic photovoltaic cells for indoor applications, Nat. Energy, 4, 768–775 (2019); DOI:10.1038/s41560-019-0448-5.
  2. Indoor Organic Photovoltaics: Optimal Cell Design Principles with Synergistic Parasitic Resistance and Optical Modulation Effect, M. Saeed et al., Adv. Energy Mater., 2003103 (2021); Adv. Energy Mater. 2021, 2003103.
  3. Recent Progress on Indoor Organic Photovoltaics: From Molecular Design to Production Scale, M. Mainville et al., ACS Energy Lett., 5, 4, 1186–1197 (2020); DOI: 10.1021/acsenergylett.0c00177.
  4. Non-fullerene Small Molecules-Enabled High-Performance Organic Photovoltaics for Indoor Energy Harvesting, C. Lee et al., Adv. Energy Sustainability Res., 2100041 (2021); DOI: 10.1002/aesr.202100041.

General Information

CAS Number N/A
Chemical Formula C88H78Cl4O4S4
Purity ≥98% (1H NMR)
Full Name 3,9-bis[5,6-dichloro-1H-indene-1,3(2H)dione]-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2’,3’-d’]-s-indaceno[1,2-b:5,6-b’]dithiophene
Synonyms IO-4Cl
Molecular Weight 1469.63 g/mol
HOMO / LUMO HOMO = -5.72 eV, LUMO = -3.83 eV [1]
Solubility Chloroform, chlorobenzene and dichlorobenzene
Form Black powder/crystal
Classification / Family n-type non-fullerene electron acceptors, Organic semiconducting materials, Low band-gap small molecule, Small molecular acceptor, Indoor organic photovoltaics (IOPVs), Polymer solar cells, NF-PSCs.

MSDS Documentation

IO-4Cl MSDS SheetIO-4Cl MSDS sheet


Batch Quantity Price
M2298A1 100 mg £340
M2298A1 250 mg £680
M2298A1 500 mg £1150
M2298A1 1 g £2000
M2298A1 5 g / 10 g* Please contact us for details

*for 5 - 10 grams order quantity, the lead time is 4 - 6 weeks

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.

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