First-Principles Studies of Two-Dimensional ZnO Materials

First‐principles investigations, principally based on density functional theory (DFT), have transformed our understanding of two‐dimensional zinc oxide (ZnO) in its various polymorphic forms. These studies have revealed that monolayer and few‐layer ZnO can adopt graphene‐like or rock‐salt‐derived lattices with pronounced quantum confinement effects. Structural relaxations yield stable hexagonal lattices with bond lengths and angles distinct from bulk wurtzite ZnO. Electronic band structures are highly sensitive to layer thickness, strain, and chemical functionalisation, enabling bandgap tuning across the ultraviolet to visible spectrum. Computed optical spectra indicate strong absorption peaks and high transmittance windows, making 2D ZnO promising for transparent conducting electrodes and ultraviolet photodetectors. Surface modifications—through dopant atoms, organic adsorbates or vacancy engineering—offer routes to tailor magnetic moments, work functions and charge‐carrier densities. Heterostructures formed with transition metal dichalcogenides further enhance photocatalytic and excitonic properties, suggesting applications in water splitting and light‐emitting diodes. Overall, first‐principles studies have mapped the interplay between dimensionality, defect chemistry and interlayer coupling, laying a foundation for the design of next‐generation optoelectronic and energy‐conversion devices.

Research from Nature Portfolio

No recent Nature Portfolio content available.

First-Principles Studies of Two-Dimensional ZnO Materials publication trend

The graph below shows the total number of articles in first-principles studies of two-dimensional zno materials across all publications each year (not limited to Nature Index journals).

Technical terms

Density functional theory (DFT): A quantum‐mechanical framework for computing electronic structure based on electron density rather than many‐body wavefunctions.

Bandgap: The energy difference between the valence‐band maximum and conduction‐band minimum, determining a material’s optical absorption threshold.

Heterostructure: A composite of two or more layered materials bonded by van der Waals forces, exhibiting new interfacial electronic and optical phenomena.

Vacancy defect: A missing atom in a crystal lattice that introduces localized electronic states and can modify magnetism and conductivity.

Work function: The minimum energy required to remove an electron from the Fermi level of a solid to the vacuum level, critical for electron emission applications.

References

1. Graphene-Like ZnO: A Mini Review. Crystals (2016).
2. Al-Doped ZnO Monolayer as a Promising Transparent Electrode Material: A First-Principles Study. Materials (2017).
3. Exploring optoelectronic properties of ZnO monolayers originated from NaCl- and GeP-like polymorphs: A first-principles study. Results in Physics (2020).
4. Excited States Calculations of MoS2@ZnO and WS2@ZnO Two-Dimensional Nanocomposites for Water-Splitting Applications. Energies (2021).
5. Electronic, Magnetic, and Optical Properties of Metal Adsorbed g-ZnO Systems. Frontiers in Chemistry (2022).
6. The Electronic Properties of g−ZnO Modulated by Organic Molecules Adsorption. Crystals (2022).
7. Effects of Vacancy Defects and the Adsorption of Toxic Gas Molecules on Electronic, Magnetic, and Adsorptive Properties of g−ZnO: A First-Principles Study. Chemosensors (2023).
8. Quantum Confinement Effects on Excitonic Properties in the 2D vdW quantum system: The ZnO/WSe2 Case. Advanced Photonics Research (2021).