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Spiro-OMeTAD (Spiro-MeOTAD)

All Semiconducting Molecules, DSSC Dyes & Electrolytes, Materials, Perovskite Interface Materials, Sublimed Materials, Transport Layer Materials

Product Code M291-500mg
Price $263 ex. VAT

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Spiro-OMeTAD, high performance HTL material

High-purity (>99%) and available online for priority dispatch

Spiro-OMeTAD (Spiro-MeOTAD) is one of the most studied and suitable hole transport layer materials (HTL) due to its facile implementation and high performance in organic-inorganic electronic devices. The spiro-linked molecule provides high glass transition temperature (Tg), morphological stability and easy processability while maintaining good electronic properties. Spiro-MeOTAD has been widely used in solid-state dye-sensitised solar cells (ssDSSC), organic light-emitting diodes (OLED), perovskite solar cells (PSCs) and polymer based organic solar cells (OSCs).

Ossila's Spiro-OMeTAD was used in a high impact paper (IF 29.37)

Spiro-OMeTAD (Spiro-MeOTAD) from Ossila was used in the high-impact paper (IF 29.37), Interfacing Pristine C60 onto TiO2 for Viable Flexibility in Perovskite Solar Cells by a Low-Temperature All-Solution Process, Y. Zhou et al., Adv. Energy Mater., 1800399 (2018); DOI: 10.1002/aenm.201800399.

High-purity Spiro-OMeTAD (Spiro-MeOTAD) is in stock now for immediate dispatch to institutions worldwide. Please contact us for bulk orders over 100g.

General Information

Full name 2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene
  • Spiro-OMeTAD
  • Spiro-MeOTAD
CAS number 207739-72-8
Molecular formula C81H68N4O8
Mw 1225.43 g/mol
UV absorption max 306, 385 nm (in CH2Cl2)
PL max 429 nm (in CH2Cl2)
HOMO / LUMO HOMO = -5.0 eV (by cyclic voltammetry), LUMO = -2.05 eV (HOMO - Eg)
Eg (optical) 2.95 eV
Spiro-OMeTAD chemical structure
Spiro-OMeTAD chemical structure

Product Details

Purity Sublimed: >99.5% (HPLC)
Unsublimed: >99.0% (HPLC)
Melting point 240 °C (approx.)
TGA >360°C (0.5% weight loss)
Appearance White to pale yellow powder
*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials for OLED devices page.


Spiro-OMeTAD HPLC trace
HPLC trace and 1H-NMR spectrum for Spiro-OMeTAD with > 99.5% purity.


 Grade Order Code Quantity Price
Unsublimed (>99.0% purity) M291 500 mg £210
Sublimed (>99.5% purity) M292 500 mg £300
Unsublimed (>99.0% purity) M291 1 g £350
Sublimed (>99.5% purity) M292 1 g £480
Sublimed (>99.5% purity) M292 5 g £2100
Sublimed (>99.5% purity) M292 10 g £4000
Unsublimed (>99.0% purity) M291 10 g £2500


  1. Interface engineering of highly efficient perovskite solar cells, Huanping Zhou et al., Science, V 34, p.546 (2014).
  2. Sequential deposition as a route to high-performance perovskite-sensitized solar cells, Julian Burschka et al., Nature, V499 p.316 (2013).
  3. Nanostructured TiO2 /CH3NH3PbI3 heterojunction solar cells employing spiro-OMeTAD/Co-complex as hole-transporting material, Jun Hong Noh et al., J. Mater. Chem. A, 1, 11842-11847, DOI: 10.1039/C3TA12681A (2013).

Key details from references

  • [1]: High efficiency perovskite solar cells with >19% efficiency. Doping regime specified via reference [2].
  • [2]: Spin coated spiro-MeOTAD in chlorobenzene doped with the below compounds (doping ratio's specified in reference [3]:
  • [3]: Doped with the below concentrations
    • 50 mM spiro-OMeTAD in chlorobenzene
    • Co(III)-complex (FK209) first dissolved into an acetonitrile stock solution prepared with concentrations in the range 4 to 33 mM before being added to the Spiro/chlorobenzene solution
    • FK209 stock solution mixed with Spiro/chlorobenzene solution to give overall 7.7 mol% FK209 to Spiro-OMeTAD
    • Also doped with a stock solution of Li-bis(trifluoromethanesulfonyl)imide (Li-TFSI) at 170 mg and TBP at 46.6% by volume in acetonitrile
    • Spin-coated at 3000 rpm for 30s

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, military, pharmaceuticals, cosmetics, food, or commercial applications.

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