Photoelectrochemical cells for hydrogen production from solar energy - Solar Energy Sciences and Engineering Applications - page 296

Figure 10.2.2 No-biased single photo-system configurations for solar water splitting (SC - semicon-
ductor; M - metal;WE - working electrode; CE - counter-electrode) - (adapted from
Minggu et al., 2010): a) n-type semiconductor photoanode and a metal counter-electrode;
b) p-type semiconductor photocathode and a metal counter-electrode; and c) monolithic
configuration.

Figure 10.2.3 Different no-biased multiple photo-system configurations for solar water splitting
(SC - semiconductor; M - metal;WE - working electrode; CE - counter-electrode) -
(adapted fromMinggu et al., 2010): a) n- and p-type semiconductors wired; b) n- and
p-type semiconductors linked by an ohmic contact; and c) hybrid systems.

iii ) monolithic configuration - bipolar system and a layered metal counter-electrode

(Figure 10.2.2c).

Concerning multiple photo-system arrangements, the following configurations can be
identified: (Minggu et al., 2010)

i ) n- and p-type semiconductors (acting as photoanode and photocathode, respec-

tively) (Nozik, 1976), wired (Figure 10.2.3a) or linked by an ohmic contact
(Figure 10.2.3b);