786759.fig.009a
(a)
786759.fig.009b
(b)
786759.fig.009c
(c)
786759.fig.009d
(d)
Figure 9: Dependence of the open-circuit potential ( 𝐸 O C ) on illumination intensity measured in (a) HCl (0.1 M; pH = 1.1), (b) NaCl (0.1 M; pH = 6.9), and (c) NaOH (0.1 M; pH = 12.3). (d) pH dependence of flatband potential ( 𝐸 F B ). The electrolyte was degassed by intense bubbling with nitrogen.