Parallel multi-stacked photoanodes of Sb-doped p-n homojunction hematite with near-theoretical solar conversion efficiency.

ABSTRACT: Developing transparent and efficient photoanodes is a challenging but essential task in tandem photoelectrochemical cell for unassisted solar water splitting without an external bias. Here we report construction of p-n homojunction hematite photoanodes by hybrid microwave annealing-induced single antimony doping, which results in the gradually-increased valence states from the surface to the inside by the unique features of hybrid microwave annealing. The Sb-doped p-n homojunction hematite photoanode exhibits improved performance and displays a good transparency, achieving a stable photocurrent density of ~4.21 mA cm^-2 at 1.23 V_RHE under 100 mW cm^-2 solar irradiation, which is comparable to the reported state-of-the-art hematite photoanodes. More importantl

SUBMITTER: Xu C 

PROVIDER: S-EPMC11550853 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature