K19 Dye

250 mg

Order Code: M2005A1
Price excludes taxes
Not in stock (price excludes taxes)

General Information

Full name Cis-bis(thiocyanato)(2,2'-bipyridyl-4,4'-dicarboxylic acid)(4,4'-bis(phexyloxystyryl)-2,2'-bipyridine)ruthenium(II)
Synonyms K19 sensitizer, Ru(4,4-dicarboxylic acid-2,2′-bipyridine)(4,4′-bis(p-hexyloxystyryl)-2,2-bipyridine)(NCS)2
Chemical formula C52H52N6O6RuS2
Molecular weight 1022.21
CAS number 847665-45-6
HOMO / LUMO n/a (Eg = 1.7 eV [1])
Solubility no data available
Classification / Family Transition metal complex, Ruthenium complex, Bipyridyl ligands, Energy materials, Dye-sensitized solar cells DSSC) materials, Donor materials, OPV materials.

Product Details

Purity  >90% (1H NMR)


Melting point >300 °C
Appearance Dark brown powder


K19 dye
Chemical structure of K19 Dye; Chemical formula: C52H52N6O6RuS2.



Cis-bis(thiocyanato)(2,2'-bipyridyl-4,4'-dicarboxylic acid)(4,4'-bis(phexyloxystyryl)-2,2'-bipyridine)ruthenium(II), K19 Dye sensitizer, is ruthenium complex dye developed for high-efficiency dye-sensitized solar cells (DSSC). High extinction coefficient (18200 M-1cm-1) of K19 sensitizer enables realisation of a new generation thin-film dye-sensitized solar cells (DSCs) yielding higher conversion efficiency [1, 2].

It has been reported that solar cells employing the K19 dye in combination with a binary ionic liquid electrolyte gave over 7.0% efficiency with excellent stability under light soaking at 60°C for 1000 hours [5].


Literature and Reviews

  1. A High Molar Extinction Coefficient Sensitizer for Stable Dye-Sensitized Solar Cells, P. Wang et al., J. Am. Chem. Soc., 127, 808-809 (2005); DOI: 10.1021/ja0436190.
  2. High Molar Extinction Coefficient Heteroleptic Ruthenium Complexes for Thin Film Dye-Sensitized Solar Cells, D. Kuang et al., J. Am. Chem. Soc., 128 (12), 4146–4154 (2006); DOI: 10.1021/ja058540p.
  3. Structure/Function Relationships in Dyes for Solar Energy Conversion: A Two-Atom Change in Dye Structure and the Mechanism for Its Effect on Cell Voltage, B. C. O’Regan et al., J. Am. Chem. Soc., 131 (10), 3451–3458 (2009); DOI: 10.1021/ja806869x.
  4. Electron Transport and Recombination in Solid-State Dye Solar Cell with Spiro-OMeTAD as Hole Conductor, F. Fabregat-Santiago et al., J. Am. Chem. Soc., 131 (2), 558-562 (2009); DOI: 10.1021/ja805850q.
  5. Ruthenium Sensitizers and Their Applications in Dye-Sensitized Solar Cells, Y. Qin et al., Inter. J. Photoenergy, 2012, 291579 (2012); doi:10.1155/2012/291579.