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o-idtbr, IDTBR, CAS# 2077945-91-4
Product Code M2238A1

o-IDTBR demonstrates an acceptor-acceptor–donor–acceptor-acceptor (A-A'–D–A'-A) structure consisting of an electron-donating ladder-type fused five-member-ring indaceno[1,2-b:5,6-b′]dithiophene (IDT) core with aliphatic n-octyl side chains, flanked by two electron withdrawing benzothiadiazole moieties and rhodanine terminated groups.

With a maximum absorption around 600 - 730 nm and reduced charge recombination losses, the small molecule acceptor has been widely used as an n-type non-fullerene acceptor (NFA) in polymer organic photovoltaics for its promising stability under ambient conditions and outstanding photovoltaic performance.

When PTB7-Th was used as the low band-gap donor polymer, mixed acceptors of o-IDTBR and o-IDFBR demonstrated a great device performance with 11.0 ± 0.4% efficiency and a high open-circuit voltage of 1.03 ± 0.01.

Device structure: indium tin oxide (ITO)/ zinc oxide (ZnO)/PCE10:IDTBR:IDFBR (85 ± 5 nm) /molybdenum oxide (MoO3)/Ag [2]

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
85 ± 5 nm 1.03 ± 0.01 17.2 ± 0.1 60 ± 1 11.0 ± 0.4

Chemical Structure

Chemical structure of o-IDTBR

General Information

Purity >98% (1H NMR)
Form Dark blue powder/crystals
Solubility Chloroform, chlorobezene
Full name (5Z,5'Z)-5,5'-((7,7'-(4,4,9,9-tetraoctyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-2,7-diyl)bis(benzo[c][1,2,5]thiadiazole-7,4-diyl))bis(methanylylidene))bis(3-ethyl-2-thioxothiazolidin-4-one)
Synonyms IDTBR
Chemical formula C72H88N6O2S8
CAS number 2077945-91-4
Molecular weight 1326.03 g/mol
Absorption λmax 600 - 730 nm (Film)
HOMO / LUMO HOMO = -5.56 eV, LUMO = -3.93 eV [1]
Melting point 219 - 221 °C (lit.)
Classification / Family NFAs, n-type non-fullerene electron acceptors, Organic semiconducting materials, Low band-gap small molecule, Small molecular acceptor, Organic photovoltaics, Polymer solar cells, NF-PSCs.

MSDS Documentation



Batch Quantity Price
M2238A1 100 mg £360.00
M2238A1 250 mg £730.00
M2238A1 500 mg £1,260.00
M2238A1 1 g £2,220.00

Literature and Reviews

  1. Carrier Transport and Recombination in Efficient “All-Small-Molecule” Solar Cells with the Nonfullerene Acceptor IDTBR, R. Liang et al., Adv. Energ. Mater., 8 (19), 1800264 (2018); doi: 10.1002/aenm.201800264.
  2. Reducing the efficiency–stability–cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells, D. Baran et al., Nat. Nater., 16, 363–369(2017); doi: org/10.1038/nmat4797.
  3. A Wide-Bandgap Donor Polymer for Highly Efficient Non-fullerene Organic Solar Cells with a Small Voltage Loss, S. Chen et al., J. Am. Chem. Soc., 139, 18, 6298–6301 (2017); doi: 10.1021/jacs.7b01606.
  4. The effect of polymer molecular weight on the performance of PTB7-Th:O-IDTBR non-fullerene organic solar cells, S. Hoefler et al., J. Mater. Chem. A,6, 9506-9516 (2018); doi: 10.1039/C8TA02467G.
  5. Digital Inkjet Printing of High-Efficiency Large-Area Nonfullerene Organic Solar Cells, D. Corzo et al., Adv. Mater. Technol., 1900040 (2019); DOI: 10.1002/admt.201900040.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.