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 M2019A1-10g
Price £190 ex. VAT

Overview | Specifications | MSDS | Literature and Reviews

Cobalt complex, tris(2-(1H-pyrazol-1-yl)pyridine) cobalt(II) di[bis(trifluoromethane)sulfonimide] (FK102 Co(II)-TFSI) is used as p-dopant materials to enhance the conductivity and lead to a downward shift of the energy levels in most case of the perovskite solar cells. With efficient charge extraction and transfer from perovskite active layer, it considerably improves the device performance and power conversion efficiency.

It is also believed that adding Co(II)-TFSI as dopant material will make the perovskite solar cell more stable even in the presence of oxygen and moisture [5].

General Information

Full name Tris(2-(1H-pyrazol-1-yl)pyridine)cobalt(II) di[bis(trifluoromethane)sulfonimide]
Synonyms Tris(2-(1H-pyrazol-1-yl)pyridine)cobalt(II) bis[bis(trifluoromethane)sulfonimide]
Chemical formula C28H21CoN11O8S4F12
Molecular weight 1054.71 g/mol
CAS number n/a
HOMO / LUMO No data available
Solubility Acetonitrile
Classification / Family Cobalt complex, Hole transport and dopant materials, Dye Sensitized Solar Cell (DSSC) Materials, Hole Conductor Cobalt Dopants, Organic Photovoltaic (OPV) Materials, Organic and Printed Electronics, Perovskite Materials
FK102 Co(II)TFSi Salt
Chemical structure of FK102-Co(II)TFSi Salt; Chemical formula: C28H21CoN11O8S4F12

Product Details

Purity >98%
Melting point 167 °C (lit.)
Appearance Orange powder

Recommended Uses

Liquid-based eletrolytes Typically 0.15-0.2M of Co(II) and ca. 0.05M Co(II)
Solid-state photovoltaic cells Up to 10 weight % added to the hole transport material system.

MSDS Documentation

FK102-Co(II)TFSi Salt MSDSFK102-Co(II)TFSi Salt MSDS Sheet

Literature and Reviews

  1. Compositional and morphological engineering of mixed cation perovskite films for highly efficient planar and flexible solar cells with reduced hysteresis, C. Wang et al., Nano Energy 35, 223–232 (2012);
  2. Dye-sensitized Solar Cells: New Approaches with Organic Solid-state Hole Conductors, N. Vlachopoulos et al., Chimia 69, 41–51 (2015); doi:10.2533/chimia.2015.41.
  3. Cobalt Dopant with Deep Redox Potential for Organometal Halide Hybrid Solar Cells, T. Koh et al., Chemsuschem, 7(7), 1909-1914 (2014); DOI: 10.1002/cssc.201400081.
Return to the top