A New Heteroleptic Biquinoline Ruthenium(II)‎ Sensitizer for Near-IR Sensitization of Nanocrystalline TiO2

Abstract EN

Ruthenium(II) complex containing cis-[Ru(H2dcbiq)(L)(NCS)2], where H2dcbiq = 4,4′-dicarboxy-2,2′-biquinoline and L = 4,4′-di-tert-butyl-2-2′-dipyridyl coded as SPS-02, was synthesized and fully characterized.

This complex showed appreciably broad absorption range.

The new complex was used as photosensitizer in nanocrystalline TiO2 dye-sensitized solar cell application.

cis-[Ru(H2dcbiq)(L)(NCS)2] (SPS-02) achieved efficient sensitization of nanocrystalline TiO2 over the whole visible range, extending into the near-IR region (ca.

1000 nm) with superior short-circuit photocurrent density (Jsc = 9.13 mA cm−2) and conversion efficiency (η = 2.09%) compared with complex cis-[Ru(H2dcbiq)2(NCS)2] (1) under an irradiation of full sunlight (100 mW cm−2).