Fabricating CdS/BiVO4 and BiVO4/CdS heterostructured film photoelectrodes for photoelectrochemical applications

Influence of ethylene glycol on efficient photoelectrochemical activity of BiVO4 photoanode via AACVD

“…Under 100 mW cm À2 light intensity, the photocurrent density recorded at 1.23 V was 0.73 mA cm À2 vs. SCE. The photocurrent achieved in our case is higher than that of previously reported photoelectrodes in the absence of the sacrificial agent and electrons or hole scavenger [12,[33][34][35][36][37][38]. In addition, fewer spikes in the chopped pattern indicate high stability of the films.…”

Electrodeposited ZnIn2S4 onto TiO2 thin films for semiconductor-sensitized photocatalytic and photoelectrochemical applications

“…This phenomenon was attributed to the photo-corrosion of metal sulfide semiconductors. Many workers had reported this phenomenon [47,48].…”

Structure and Band Alignment Engineering of CdS/TiO2/Bi2WO6 Trilayer Nanoflake Array for Efficient Photoelectrochemical Water Splitting

“…[10][11][12][13][14][15][16][17] However, many studies have revealed that the PEC activity of pure CdS is severely limited because of the highly photogenerated carrier recombination. [27][28][29][30] For example, complex CdS architec-tures, such as three-dimensional (3D), [10,11] inverse opal arrays [12][13][14] and branched nanoarrays [15][16][17] have been fabricated. [18][19][20][21][22] The sulfide/sulfite ions as hole scavengers are always necessary for stable operation.…”

“…[20] Numerous modification methods have been employed to enhance the PEC activity and stability of CdS photoanode, including morphology manipulation, [23][24][25] doping [15,26] and heterojunction construction. [27][28][29][30] For example, complex CdS architec-tures, such as three-dimensional (3D), [10,11] inverse opal arrays [12][13][14] and branched nanoarrays [15][16][17] have been fabricated. The periodically ordered geometry provides multiple scattering centers and reduces electron-hole separation distance, thereby facilitating charge generation, separation and transport.…”

“…Meanwhile, the host and guest materials usually have appropriate band alignment, i. e., type II band structure, enabling fast charge transport at the interface. Numerous CdS based guest-host photoanodes, such as CdS/ZnO, [27,34] CdS/SnO 2 , [12] CdS/TiO 2 [28] and CdS/BiVO 4 , [30] have been fabricated for PEC water splitting. Despite the progress that has been made, the main bottlenecks for such guest-host photoanode are the small specific surface area of the host and severe charge recombination at their interface, which seriously constrain the energy conversion efficiency of the PEC cells.…”