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Product Code M291-500mg
Price £210 ex. VAT

Spiro-OMeTAD, high performance HTL material

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


Spiro-OMeTAD (or 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 100 g.

General Information

CAS Number 207739-72-8
Molecular Formula C81H68N4O8
Full Name 2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene
Synonyms

Spiro-OMeTAD

Spiro-MeOTAD

Mw 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 (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 .

Characterisation

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

Pricing

 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

References

  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 30 s
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