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

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Abstract
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.