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 
|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|
|Purity||>98% (1H NMR)|
|Form||Dark blue powder/crystals|
|Molecular weight||1326.03 g/mol|
|Absorption||λmax 600 - 730 nm (Film)|
|HOMO / LUMO||HOMO = -5.56 eV, LUMO = -3.93 eV |
|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 Documentationo-IDTBR MSDS Sheet
Literature and Reviews
- 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.
- 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.
- 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.
- 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.
- 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.
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