Efficient Nickel Sulfide and Graphene Counter Electrodes Decorated with Silver Nanoparticles and Application in Dye-Sensitized Solar Cells

Table 2 EIS parameters and photoelectric properties of DSSCs with various CEs

Electrodes	DSSCs	V _oc (V)	J _sc (mA cm⁻²)	FF	PCEs (%)	R _s (Ω cm⁻²)	R _ct1 (Ω cm⁻²)	R _ct2 (Ω cm⁻²)	C _μ (μF)	τ _n(EIS) (ms)
Pt	1	0.743	15.289	0.683	7.76	5.72 ± 0.02	4.30 ± 0.02	6.61 ± 0.02	1084	7.165
Graphene	2	0.706	12.085	0.612	5.22	15.73 ± 0.02	7.05 ± 0.02	13.11 ± 0.02	404	5.296
NiS	3	0.717	12.836	0.651	5.99	14.88 ± 0.02	6.26 ± 0.02	10.37 ± 0.02	535	5.548
NiS/Gr	4	0.727	14.244	0.678	7.02	7.10 ± 0.02	5.90 ± 0.02	8.94 ± 0.02	696	6.222
NiS/Ag	5	0.735	14.909	0.654	7.17	6.46 ± 0.02	4.51 ± 0.02	10.97 ± 0.02	678	7.438
NiS/Gr-Ag	6	0.753	16.205	0.685	8.36	5.24 ± 0.02	3.24 ± 0.02	5.81 ± 0.02	1252	7.274