High Molar Extinction Coefficient Ru(II)-Mixed Ligand Polypyridyl Complexes for Dye Sensitized Solar Cell Application

[摘要] Two new ruthenium(II) mixed ligand terpyridine complexes, “Ru(Htcterpy)(NCS)(L1) (N(C4H9)4), mLBD1” and Ru(Htcterpy)(NCS)(L2)(N(C4H9)4), mLBD2were synthesized and fully characterized by UV-Vis, emission, cyclic voltammogram, and other spectroscopic means, and the structures of the compounds are confirmed by1H-NMR, ESI-MASS, and FT-IR spectroscopes. The influence of the substitution ofL1andL2on solar-to-electrical energy conversion efficiency (η) of dye-sensitized solar cells (DSSCs) was evaluated relative to reference black dye. The dyes showed molar extinction coefficients of 17600 M−1 cm−1for mLBD1and 21300 M−1 cm−1for mLBD2both atλmaximum of 512 nm, while black dye has shown 8660 M−1 cm−1atλmaximum of 615 nm. The monochromatic incident photon-to-collected electron conversion efficiencies of 60.71% and 75.89% were obtained for mLBD1and mLBD2dyes, respectively. The energy conversion efficiencies of mLBD1and mLBD2dyes are 3.15% (JSC=11.86 mA/cm2,VOC=613 mV,ff=0.4337) and 3.36% (JSC=12.71 mA/cm2,VOC=655 mV,ff=0.4042), respectively, measured at the AM1.5G conditions, the reference black dye-sensitized solar cell, fabricated and evaluated under identical conditions exhibitedη-value of 2.69% (JSC=10.95 mA/cm2,VOC=655 mV,ff=0.3750).

[学科分类] 电子、光学、磁材料