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  • Title: Few-Layer P4O2: A Promising Photocatalyst for Water Splitting.
    Author: Lu B, Zheng X, Li Z.
    Journal: ACS Appl Mater Interfaces; 2019 Mar 13; 11(10):10163-10170. PubMed ID: 30784267.
    Abstract:
    Photocatalytic water splitting by a two-dimensional material is a promising technology for producing clean and renewable energy. Development of this field requires candidate materials with desirable optoelectronic properties. Here, we present a detailed theoretical investigation of the atomic and electronic structure of few-layer P4O2 systems to predict their optoelectronic properties. We predict that the three-layer P4O2 with normal packing (α-3), ingeniously combining all desired optoelectronic features, is an ideal candidate for photocatalytic water splitting. It fascinatingly bears nearly a direct band gap (1.40 eV), appropriate band edge position, high solar-to-hydrogen efficiency (17.15%), high sunlight absorption efficiency, and ultrahigh carrier mobility (21 460 cm2 V-1 s-1) at room temperature. These results make three-layer P4O2 a promising candidate for photocatalytic water splitting.
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