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CAS Number 2102510-60-9

Materials, Non-Fullerene Acceptors

Product Code M2413A1-100mg
Price £470 ex. VAT

A non-fullerene acceptor

Used to enhance the performance of organic solar cells

Specifications | Pricing and Options | MSDS | Literature and Reviews

EH-IDTBR (CAS number 2102510-60-9) is a small molecule with an indacenothiophene core capped with two benzothiadiazole-linked rhodanine groups. Same as o-IDTBR, EH-IDTBR also possesses an acceptor-acceptor–donor–acceptor-acceptor (A-A'–D–A'-A) structure and is widely used as a non-fullerene acceptor in organic/polymer solar cells. EH-IDTBR has a HOMO energy level at −5.6 eV and a LUMO at −3.9 eV, resulting in bandgap of 1.7 eV. EH-IDTBR is typically blended with the active material to create a bulk heterojunction as the active layer in solar cells. In a solar cell device of ITO/ZnO/EH-IDTBR/PffBT4T-2OD/MoO3/Ag, EH-IDTBR has demonstrated improved stability with negligible 'burn-in' efficiency loss compared to PffBT4T-2OD:PC71BM devices (PCE losses after 60 h of 0 ± 4% and −26± 8%, respectively).

With addition of EH-IDTBR (18%) as the third component to the active layer of PCE10:F8IC, the PCE is increased from 7.2% to 12.3%. This increase can be attributed to the reduced energetic disorder in hole and electron transport facilitated by EH-IDTBR.

Enhanced OPV perfoarmance EH-IDTBR

Enhanced OPVs performance

PCE increased from 7.2% to 12.3%

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Non-fullerene acceptor 2102510-60-9

Non-fullerene acceptor

Non-fullerene acceptor in organic/polymer solar cells

Improve OPV life-time EH-IDTBR

Improve OPVs life-time

Negligible "burn-in" efficiency loss

Device structure: ITO/ZnO/EH-IDTBR-PffBT4T-2OD/MoO3/Ag [3]

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
70nm (PffBT4T-2OD:EH-IDTBR 1:1.4) 1.08 14.6 60.0 9.5

Device structure: ITO/PEDOT:PSS/EH-IDTBR-PCE10-F8IC/DPO/Ag [5]

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
160-170nm(EH-IDTBR:F8IC:PCE10 1:1.4:0.3) 0.66 24.6 71.4 12.3

EH-IDTBR is available to buy online in quantities from 100 mg to 1 g (please contact us for larger orders). Larger quantities offer the best value, while smaller quantities may be more suitable for some applications. Eligible orders ship free.

General Information

CAS Number 2102510-60-9
Chemical Formula C72H88N6O2S8
Purity 98%
Full Name (5Z)-3-Ethyl-2-sulfanylidene-5- [[4-[9,9,18,18-tetrakis(2-ethylhexyl)-15-[7-[(Z)-(3-ethyl-4-oxo-2-sulfanylidene-1,3-thiazolidin-5-ylidene)methyl]-2,1,3-benzothiadiazol-4-yl]-5,14-dithiapentacyclo[,10.04,8.013,17]octadeca-1(12),2,4(8),6,10,13(17),15-heptaen-6-yl]-2,1,3-benzothiadiazol-7-yl]methylidene]-1,3-thiazolidin-4-one
Molecular Weight 1326.03 g/mol

λmax 642 nm (CH2Cl2) [2]

λmax 675 nm (film) [2]


λmax 738 nm (CH2Cl2) [2]

λmax 766 nm (film) [2]


HOMO = −5.6 eV

LUMO = −3.9 eV [1]

Melting Point 211 – 216 °C
Solubility Chloroform, chlorobenzene
Appearance Black powder
Synonyms N/A
Classification / Family NFAs, Non-fullerene acceptors, organic semiconducting materials, low band-gap small molecule, small molecular acceptor, organic photovoltaics, polymer solar cells, NF-PSCs, NLOs

Chemical Structure

EH-IDTBR chemical structure, CAS 2102510-60-9
EH-IDTBR chemical structure, CAS 2102510-60-9


Product Code Quantity Price
M2413 100 mg ]] £470
M2413 250 mg £940
M2413 500 mg £1500
M2413 1 g £2400

MSDS Documentation


Literature and Reviews

  1. Mid-gap trap state-mediated dark current in organic photodiodes, O. Sandberg et al., Nat. Photonics, 17, 368–374(2023); DOI: 10.1038/s41566-023-01173-5.
  2. Highly broadband NLO response of acceptor-donor-acceptor materials with a planar conformation, Y. Huang et al., Mater. Adv., 2, 2097(2021); DOI: 10.1039/d0ma00918k.
  3. An efficient, "burn in" free organic solar cell employing a nonfullerene electron acceptor, H. Cha et al., Adv. Mater., 29(33), 1701156(2017); DOI: 10.1002/adma.201701156.
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