High-Efficiency Photochemical Water Splitting of CdZnS/CdZnSe Nanostructures

Table 1

Photocurrent densities, applied voltages (vs. SCE), and efficiencies (𝜂) of the TiO₂/CdZnS_(𝑚)/CdZnSe_(𝑛) electrodes and those of other previously reported TiO₂-based electrodes.

Electrodes	Photocurrent density (mA cm^−2)	Applied voltage (V)	𝜂 (%)^a	Reference
CdZnS(3)/CdZnSe(2)	5.9	−0.8	3.89	This work
CdZnS(4)/CdZnSe(2)	7.3	−0.87	5.34	This work
CdZnS(5)/CdZnSe(2)	9.7	−0.9	7.27	This work
CdZnS(6)/CdZnSe(2)	8.9	−0.88	6.49	This work
CdZnS(7)/CdZnSe(2)	8.4	−0.87	5.98	This work
CdZnS(5)/CdZnSe(0)	2.9	−1.0	2.47	This work
CdZnS(5)/CdZnSe(1)	7.9	−0.94	6.31	This work
CdZnS(5)/CdZnSe(3)	7.6	−0.91	5.70	This work
CdZnS(0)/CdZnSe(2)	4.6	−1.02	4.01	This work
CdSe	2.75	−0.494	NA^b	[16]
TiO2/CdS & CdSe	12	0.356	NA	[14]
TiO2/CdS/CdSe	14.9	−0.544	NA	[15]
CdZnS(3)/CdZnSe(2)	5.5	−0.644	3.67	[11]

^aUnder AM 1.5 (100 mW cm⁻²) illumination of light. ^bNot available.