FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

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

Spiro-OMeTAD, high performance HTL material

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

Overview | Specifications |Pricing and Options | Literature and Reviews

Spiro-OMeTAD (or Spiro-MeOTAD), CAS number 207739-72-8, 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; and paper (IF 39.714), In situ simultaneous photovoltaic and structural evolution of perovskite solar cells during film formation, M. Alsari et al., Energy Environ. Sci., 11, 383-393 (2018); DOI: 10.1039/C7EE03013D.

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



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


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 .


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).

Return to the top