Piezotronic Devices and Semiconductor Dynamics

Piezotronic devices exploit the intimate coupling between piezoelectricity and semiconducting behaviour to modulate charge‐carrier transport through mechanically induced electric potentials. When a strain is applied to a piezoelectric semiconductor, ionic displacement generates a local piezopotential that acts as a gate voltage at metal–semiconductor contacts or p–n junctions. This piezo‐gating effect can dynamically control carrier injection, separation and recombination, enabling novel sensor, actuator and energy‐harvesting functionalities. Semiconductor dynamics in these materials encompasses carrier drift, diffusion, screening and multi‐field interactions under static and transient mechanical loading. Advances in nanoscale architectures—such as nanowires, nanofibres and functionally graded plates—have illuminated the complex interplay between mechanical deformation, electric fields and mobile charges. The ability to tailor heterostructures and to integrate piezotronic elements into flexible and stretchable substrates offers promising routes for low‐power human‐machine interfaces, self-powered devices and adaptive electronics. By combining analytical modelling, numerical simulation and emerging data-driven methods, the field continues to refine our understanding of multi-field coupling phenomena and to broaden the scope of applications in sensing, optoelectronics and energy conversion.

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Piezotronic Devices and Semiconductor Dynamics publication trend

The graph below shows the total number of articles in piezotronic devices and semiconductor dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Piezotronics: The field that harnesses strain-induced piezopotential to control semiconductor charge-carrier behaviour and device operations.

Piezopotential: An electric potential generated by mechanical deformation of a piezoelectric material, acting as an internal bias or gate voltage.

Carrier screening effect: The reduction of piezopotential magnitude by mobile charges that redistribute to oppose the induced electric field.

Multi-field coupling: Interactions among mechanical, electrical and carrier‐transport fields in piezoelectric semiconductors, often described by coupled differential equations.

Heterostructure: An assembly of dissimilar semiconductor or piezoelectric layers engineered to exploit interface phenomena and enhance device performance.

References

1. Piezotronics and piezo-phototronics: fundamentals and applications. National Science Review (2013).
2. Optimal concentration of holes and electrons in semiconductors for energy harvesting based on love waves propagation in a PSC film/substrate. Materials Today Sustainability (2024).
3. Multi-field coupling and free vibration of a sandwiched functionally-graded piezoelectric semiconductor plate. Applied Mathematics and Mechanics (2023).
4. Analysis of nonlinear multi-field coupling responses of piezoelectric semiconductor rods via machine learning. International Journal of Smart and Nano Materials (2023).