The photovoltaic stability of, bis(isothiocyanato)rlutheniurn(II)-bis-2, 2′bipyridine-4, 4′-dicarboxylic acid and related sensitizers


  • Support of this work by the european joule III program is gratefully acknowledged.


The photovoltaic stability of RuII(LH2)2(NCS)2 (where LH2 = 2,2′-bipyridyl-4,4′-dicarboxylic acid), a potential sensitizer for solar cells based on anatase, is examined. Its suitability for this role is demonstrated by a 7000 h endurance test, at the end of which no discernible signs of degradation can be detected. An explanation for its remarkable stability of provided by an investigation of its photo- and thermally induced reactions in alcoholic solution. Recommendations as to how to avoid ligand substitution reactions that may be undesirable for certain applications are also made.