Spiro-OMeTAD, also known as Spiro-MeOTAD (CAS 207739-72-8), is a spirobifluorene-based hole transport layer (HTL) material and one of the most widely researched choices for organic-inorganic electronic devices. Product code M291 is the unsublimed grade, supplied with a purity above 99.0% by HPLC as a white to pale yellow powder.
Its spiro-linked molecular structure gives a high glass transition temperature and good morphological stability, while the material stays easy to process and keeps good electronic properties. It has a HOMO level of -5.0 eV, a LUMO of -2.05 eV and an optical band gap of 2.95 eV, with thermal stability above 360 °C (0.5% weight loss by TGA).
The material is used in perovskite solar cells, solid-state dye-sensitized solar cells, polymer organic solar cells and OLEDs. Ossila Spiro-OMeTAD has been used in published perovskite solar cell research, including work in Adv. Energy Mater. and Energy Environ. Sci. in 2018.
- Hole transport layer in perovskite solar cells (PSCs).
- Hole transport material in solid-state dye-sensitized solar cells (ssDSSC).
- Hole transport layer in polymer-based organic solar cells (OSCs).
- Hole transport layer in organic light-emitting diodes (OLEDs).
- Spin-coated from chlorobenzene solution with dopants such as LiTFSI and 4-tert-butylpyridine for device fabrication.
| Brand | Ossila |
|---|---|
| CAS number | 207739-72-8 |
| Molecular formula | C81H68N4O8 |
| Purity | >99.0% (HPLC) |
| Category | — |
| Pack sizes | 500 mg, 1 g, 5 g, 10 g |
| Physical form | White to pale yellow powder |
| Storage | — |
- Product code: M291
- Full Name: 2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene
- Synonyms: Spiro-OMeTAD, Spiro-MeOTAD
- Molecular Weight: 1225.43 g/mol
- UV Absorption Max: 306 nm, 385 nm (in CH2Cl2)
- PL Max: 429 nm (in CH2Cl2)
- HOMO / LUMO: HOMO = -5.0 eV, LUMO = -2.05 eV
- Optical Band Gap: 2.95 eV
- Melting Point: 240 °C (approx.)
- TGA: >360 °C (0.5% weight loss)
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