CAS Number 2042521-91-3
IDT-2Br (CAS number 2042521-91-3), like o-IDTBR, has an electron-donating ladder-type fused five-member-ring indaceno[1,2-b:5,6-b′]dithiophene (IDT) core with 4-hexylphenyl side chains, flanked by two electron withdrawing benzothiadiazole moieties and rhodanine terminated groups.
IDT-2Br is a planar electron acceptor when it is compared with o-IDTBR, exhibiting excellent thermal stability, strong and broad absorption, relatively high electron mobility.
When PTB7-Th was used as the low band-gap donor polymer, mixed acceptors of F8IC and IDT-2Br demonstrated a great device performance with 12.1% efficiency
Device structure: indium tin oxide (ITO)/ zinc oxide (ZnO)/PCE10:IDT-2BR:F8IC/molybdenum oxide (MoO3)/Ag [2]
| Thickness (nm) | VOC (V) | JSC (mA cm-2) | FF (%) | PCE (%) |
| 100 nm | 0.687 | 25.1 | 69.9 | 12.1 |
Chemical structure of IDT-2Br, CAS number: 2042521-91-3
| CAS Number | 2042521-91-3 |
| Chemical Formula | C88H88N6O2S8 |
| Purity | ≥98% (1H NMR) |
| Full Name | 5,5'-[[4,4,9,9-Tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-2,7-diyl]bis(2,1,3-benzothiadiazole-7,4-diylmethylidyne)]bis[3-ethyl-2-thioxo-4-thiazolidinone] |
| Molecular Weight | 1518.20 g/mol |
| Absorption | λmax 636 nm (Chloroform); λmax 658 nm (Film) |
| HOMO / LUMO | HOMO = -5.52 eV, LUMO = -3.69 eV [1] |
| Melting Point | TGA 367 °C (5% weight loss) (lit.) |
| Solubility | Chloroform, chlorobezene |
| Form | Dark blue powder/crystals |
| Synonyms | IDT2BR |
| 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. |
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