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.
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 (%)|
Our high purity (>99%) IEICO-4Cl is available for priority dispatch (lead times may apply for large quantities) and ships free with qualifying orders.
|Form||Dark blue powder/crystals|
|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 |
|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 DocumentationIEICO-4Cl MSDS Sheet
Literature and Reviews
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.
- 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.
- Nonfullerene Acceptors for Semitransparent Organic Solar Cells, S. Dai et al., Adv. Energy Mater., 1800002 (2018); DOI: 10.1002/aenm.20180000.
- 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.
- 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.
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