Table 1.

Values of open circuit potential of the cells with screen-printed NiO in the bare or sensitized state as working electrode.

NiO sample	Dye-sensitizer	Open circuit potential/V vs. Ag/AgCl
1	-	0.113
1	Erythrosine b*	−0.144
1	Erythrosine b**	0.028
1	Cumarin 343	0.280
1	Cumarin 153	0.150
1	Fast Green	−0.055
1	P1	0.140
2	–	0.360
2	VG1	0.150
2	VG10	−0.210
2	VG11	−0.187
2	DS35	0.005
2	DS44	−0.160
2	DS46	−0.243
3	–	0.340
3	VG11	0.142
3	DS46	0.110
3	Fast Green	0.040

Electrolyte: 0.2 M LiClO₄ in 3-methoxy-propionitrile. Sample 1 refers to NiO deposits screen printed from slurries with 1 mL of HCl. Samples 2 and 3 refer to NiO deposits screen printed form slurries with 1 mL and 5 mL of CH₃CO₂H, respectively.

^*NiO sample immersed in the sensitizing solution for 2 h

^**NiO sample immersed in the sensitizing solution for 16 h.