3PATAT-C3 (CAS 3048690-10-1) is a self-assembled monolayer (SAM) molecule with a tripodal design, used as a hole transport or hole extraction layer in inverted (p-i-n) perovskite solar cells and non-fullerene acceptor polymer solar cells. Each molecule carries three phosphonic acid anchors linked through n-propyl spacers to a single triazatruxene head group.
Because all three anchors bind to the electrode, the π-conjugated triazatruxene terminal is held face-on towards the anode. This orientation lets it pick up holes from the perovskite layer more effectively than the edge-on arrangement typical of single-anchor SAMs. Reported devices with this material reached a PCE of 23.0%, against 21.0% for MeO-2PACz-based devices, and showed no PCE loss after more than 2000 h of shelf-stability testing.
The material can replace PEDOT:PSS as a hole-selective contact and is deposited from dilute solutions such as 1 mM. Common solvents include DMF, THF, IPA, ethanol and methanol. A coating from 1 mM DMF solution on ITO gives a surface density of 2.9 × 10^13 molecules cm–2 and raises the water contact angle from 8° to 75°. It is supplied as a white to grey powder or crystals with purity above 98% (HPLC).
- Hole-collecting self-assembled monolayer in inverted p-i-n perovskite solar cells.
- Hole transport or extraction layer in NFA-polymer organic solar cells.
- Solution-processed alternative to PEDOT:PSS as a hole-selective contact.
- Surface modification of ITO anodes by spin-coating from dilute solution.
| Brand | Ossila |
|---|---|
| CAS number | 3048690-10-1 |
| Molecular formula | C33H36N3O9P3 |
| Purity | > 98% (HPLC) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | White to grey powder/crystals |
| Storage | — |
- Product code: M2460A1
- Molecular Weight: 711.58 g/mol
- Absorption: λmax 324 nm in DMF
- HOMO: 5.48 eV
- Processing Solvents: DMF, THF, IPA, ethanol, methanol
- Typical Concentration: 1.0 mg/ml, 1 mM (0.711 mg/ml), 0.1 mM
- Synonym: [(5H-Diindolo[3,2-a:3',2'-c]carbazole-5,10,15-triyl)tris(propane-3,1-diyl)]tris(phosphonic acid)
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