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. 2017 Aug 17;3(9):1015–1025. doi: 10.1021/acscentsci.7b00310

Figure 5.

Figure 5

Photogenerated hole transfer at the interface of partially activated α-Fe2O3|Ni0.8Fe0.2Ox electrodes. (a) Illuminated CVs for a representative “partially activated” DWE device under illumination measured through WE1 and WE2 separately. (b) In situ measurements of JWE2 and Jsem with Vsem = 0 V vs εo2/OH– and VWE2 held at potentials from −0.26 to 0.26 V vs εo2/OH– in chronoamperometry steps under chopped illumination show 35% efficiency of photohole collection through WE2. (c) Illuminated CVs for a representative “more-activated” DWE device under illumination measured through WE1 and WE2 separately. (d) In situ measurements of JWE2 and Jsem with Vsem = 0 V vs εo2/OH– and VWE2 held at potentials from −0.26 to 0.26 V vs εo2/OH– in chronoamperometry steps under chopped illumination show 67% efficiency of photohole collection through WE2.