Synthesis and Application of New Ruthenium Complexes Containing β-Diketonato Ligands as Sensitizers for Nanocrystalline TiO₂ Solar Cells

Table 2

Photovoltaic properties of ruthenium polypyridyl sensitizers^a.

Sensitizer	IPCEmax	𝐽sc (mA cm^−2)	𝑉oc (V)	FF	η (%)
1	70	16.7	0.58	0.64	6.2
2	61	14.2	0.57	0.66	5.3
3	54	13.0	0.58	0.70	5.3
4	30	7.6	0.56	0.70	3.0
5	24	6.2	0.45	0.71	2.0
R1^b	70	18.3	0.57	0.64	6.7

^aConditions: sealed cells; coadsorbate, DCA 40 mM; photoelectrode, TiO₂ (20 μm thickness and 0.25 cm²); electrolyte, 0.6 M DMPII, 0.1 M LiI, 0.05 I₂ in AN; irradiated light, AM 1.5 solar light (100 mW cm⁻²). 𝐽_sc, short-circuit photocurrent density; 𝑉_oc, open-circuit photovoltage; FF, fill factor; η, total power conversion efficiency; IPCE, incident photon-to-current conversion efficiency.
^bData taken from [13].