Direct growth of hematite film on p+n-silicon micro-pyramid arrays for low-bias water splitting

Constructing a full-space internal electric field in a hematite photoanode to facilitate photogenerated-carrier separation and transfer

“…2b). 53 Both FeOOH and Fe(OH)O belong to hydroxides of iron, and there is no essential difference in the molecular structure. Therefore, only one peak (i.e., the FeOOH) is taken into consideration in many literature studies.…”

Advances and challenges in the modification of photoelectrode materials for photoelectrocatalytic water splitting

“…The wired-connection configuration for the FTO/ Sn@a-Fe 2 O 3 photoanode and the Si p-n junction solar cell shows much better PEC performances relative to the proposed p + n-Si/ SnO 2 /Sn@a-Fe 2 O 3 /Co-Pi photoanode. 79 However, the production process of this PEC/PV series device is complex and still needs to be further developed.…”

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

“…Wu and Li et al introduced the “TOPCon” c‐Si PV cell based on the embedded p + ‐n‐Si homojunction and the boron‐doped p + emitter. After integrating with α‐Fe 2 O 3 photoanode, they realized the PEC/PV tandem system for solar‐driven overall water splitting without bias 31 …”

“…24 Although Si semiconductor can absorb almost the entire solar spectrum, the planar Si displays strong light reflection. Therefore, it is necessary to construct the specific surface structures to enhance light absorption, such as Si microstructures (micropyramids, [28][29][30][31][32] microwires, [33][34][35] microporous Si 36,37 ) and nanostructures (nanopyramids, 38,39 nanowires, [40][41][42][43][44][45][46][47][48] nanopillars, [49][50][51] nanorods, 52,53 nanospheres, 54 etc.). Both the micro-and nano-structures can increase light harvesting via the multiple reflections and scattering.…”

“…After integrating with α-Fe 2 O 3 photoanode, they realized the PEC/PV tandem system for solar-driven overall water splitting without bias. 31 The advantages of constructing Si homojunction include simple preparation process, mature technology, and low cost. It can also effectively promote the separation of photogenerated carriers in the bulk.…”