科研之友
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摘要
The non-coincidence of the positive and negative charge centers of perovskite ferroelectric crystals leads to spontaneous polarization inside the materials to generate a built-in electric field. The existence of built-in electric field is beneficial to the transmission and separation of photo-excited carriers. However, perovskite ferroelectric materials are mostly wide-band gap semiconductors. Photogenerated electrons and holes generated when materials are excited are easy to recombine. Therefore, adjusting their photoelectrochemical performance has become a research hotspot. In this paper, the principles and progress of controlling the photoelectrochemical performance of perovskite ferroelectric materials are introduced, such as doping and substitution of elements, deposition of precious metals on the surface, construction of semiconductor heterostructure and multi-mechanism coupling. The applications status of these materials in photocatalytic degradation of pollutants, photocatalytic hydrogen production and photoelectrochemical water splitting hydrogen production in recent years are emphatically introduced.
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