Development of a New Class of Thiocyanate-Free Cyclometalated Ruthenium(II) Complex for Sensitizing Nanocrystalline TiO_(2) Solar Cells

摘要

We designed and developed a new class of thiocyanate-free cyclometalated ruthenium sensitizers for sensitizing nanocrystalline TiO_(2) solar cells. This complex shows appreciably broad absorption range. Anchoring to nanocrystalline TiO_(2) films for light to electrical energy conversion in regenerative photoelectrochemical cells achieves efficient sensitization to TiO_(2) electrode. With this new sensitizer, there were a power conversion efficiency of 4.76percent, a short-circuit photocurrent density of 11.21 mA/cm~(2), an open-circuit voltage of 0.62 V, and a fill factor of 0.68 obtained under standard AM 1.5 sunlight.