Construction of BiFeO₃/SrTiO₃ p-n heterojunction for enhanced photoelectrochemical performance

In this study, we design a hybrid BiFeO3/SrTiO3 p-n heterojunction to enhance the photoelectrochemical (PEC) performance of the sample. The experimental results reveal that the heterojunction can significantly improve the PEC performance. The optimized BiFeO3/SrTiO3 heterojunction sample shows a photocurrent density of -20.8 mu Acm(-2), which is 2.9 times higher than that of the pristine BiFeO3 (-7.2 mu Acm(-2)). The improvement in PEC performance is attributed to the p-n heterojunction formed between BiFeO3 and SrTiO3, leading to the efficient separation and transport of carriers. Our work provides a promising route to develop the high-performance PEC system.