Electronic Properties of Two-Dimensional Phosphorus Allotropes

Two-dimensional phosphorus allotropes exhibit a rich landscape of electronic behaviours arising from their structural diversity and quantum confinement. Black phosphorene, with its puckered lattice, combines a thickness-dependent direct band gap ranging from near-infrared to visible wavelengths with high in-plane carrier mobility, making it suitable for field-effect transistors and photodetectors. Blue phosphorene adopts a buckled honeycomb geometry, presenting indirect to direct band-gap tunability under strain and heterostructuring, alongside robust exciton binding energies that underpin potential optoelectronic and photovoltaic devices. Novel allotropes such as Kagome and chiral blue variants demonstrate flat bands and metallic states tied to lattice topology and stacking, offering pathways to spintronics and catalysis. Interlayer coupling in multilayer structures and van der Waals heterostructures further modulates band alignment and charge transfer, enabling tailored charge separation and transport. The interplay between chirality, dimensionality and external stimuli—electric fields, strain or chemical functionalisation—renders two-dimensional phosphorus a versatile platform for next-generation electronics, optoelectronics and energy applications.

Research from Nature Portfolio

Recent studies have achieved the synthesis of large-area ultraflat chiral blue phosphorene on metallic substrates, revealing an unanticipated planar honeycomb network with long-range spatial chirality. Spectroscopic analysis confirms its intrinsic metallic character and unique quantum oscillations in image-potential states, opening prospects for chiral spintronics, polarisation optics and enantioselective catalysis. Parallel investigations into buckled versus puckered phosphorene and arsenene have employed advanced many-body methods to deliver accurate band gaps and excitonic properties. These computations demonstrate that blue phosphorene exhibits a wide optical band gap of approximately 2.95 eV with strong exciton binding, while black phosphorene features a narrower gap near 1.83 eV. The work highlights the impact of lattice topology on electron–hole interactions and suggests design principles for tailored optoelectronic architectures.

Electronic Properties of Two-Dimensional Phosphorus Allotropes publication trend

The graph below shows the total number of articles in electronic properties of two-dimensional phosphorus allotropes across all publications each year (not limited to Nature Index journals).

Technical terms

Allotrope: A distinct structural form of an element with unique atomic arrangement and properties.

Band gap: The energy difference between valence and conduction bands determining a material’s electronic and optical response.

Carrier mobility: The ease with which electrons or holes move through a crystal under an applied electric field.

Chirality: A geometric property where a structure is not superimposable on its mirror image, influencing optical and electronic phenomena.

Van der Waals heterostructure: A layered assembly of two-dimensional materials held together by weak interlayer forces, enabling novel band alignments.

References

1. Realization of large-area ultraflat chiral blue phosphorene. Nature Communications (2024).
2. Theoretical predictions on the electronic structure and charge carrier mobility in 2D Phosphorus sheets. Scientific Reports (2015).
3. Electronic and optical properties of the buckled and puckered phases of phosphorene and arsenene. Scientific Reports (2022).
4. Direct Observation of Structural Phase Transformations during Phosphorene Formation on Cu(111). ACS Nano (2025).
5. Molecular doping of blue phosphorene: a first-principles investigation. Journal of Physics Condensed Matter (2019).
6. Tuning Electronic Properties of Blue Phosphorene/Graphene-Like GaN van der Waals Heterostructures by Vertical External Electric Field. Discover Nano (2019).
7. Electronic Structural and Optical Properties of Multilayer Blue Phosphorus: A First‐Principle Study. Journal of Nanomaterials (2019).
8. High applicability of two-dimensional phosphorous in Kagome lattice predicted from first-principles calculations. Scientific Reports (2016).
9. Electronic structures and enhanced optical properties of blue phosphorene/transition metal dichalcogenides van der Waals heterostructures. Scientific Reports (2016).