Opto-electro-thermo-mechanical behaviours of perovskite plates

Metal-halide perovskites are rapidly emerging as promising candidates for next-generation solar cells and photoelectric technologies. However, their structural behaviours considering opto-electro-thermo-mechanical properties in multi-physics fields have not yet been fully understood, thus limiting their engineering applications. This paper proposes a new opto-electro-thermo-elastic model taking into account photostriction, photothermal effect, electrostriction, and piezoelectricity for lead halide perovskites and investigates their static and dynamic opto-electro-thermo-mechanical behaviours. The governing equations of perovskite plates are derived within the theoretical framework of first-order shear deformation theory and are numerically solved using the Chebyshev-Ritz method. Comprehensive parametric studies are carried out to examine the influences of multi-physics fields on the critical light intensity, critical electric field, static bending, elastic buckling, free vibration, as well as dynamic responses of perovskite plates. Numerical results show that light illumination, photoinduced temperature rise, and applied electric field play an important role in bending deformation, dynamic deflection, critical buckling load, and free vibration frequency hence need to be taken into consideration for the design of perovskite-based photoelectric devices.