<p>Lead halide perovskites are widely recognized as the leading candidates for next-generation photovoltaic solar cells owing to their excellent efficiency and low cost. However, their mechanical and dynamic behavior when integrated into load-bearing sandwich structures under coupled photo-electro-thermal-mechanical loading remains unaddressed. This work develops a constitutive model for analyzing the free vibration and transient response of perovskite-based sandwich cylindrical panels with carbon-fiber-reinforced polymer (CFRP) skins and an arc-type auxetic core (ATAC). The governing equations of motion for perovskite-based sandwich cylindrical panels are derived based on the hypotheses of the first-order shear deformation theory (FSDT) and Hamilton’s principle. These equations are discretized into a matrix eigenvalue problem via Galerkin’s method, with the Newmark-beta method employed to analyze the panels’ dynamic responses. Parameter analysis is conducted to examine how the coupled photo-electro-thermal-mechanical effects, combined with the geometrical properties of the ATAC and the fiber orientation angle in CFRP skins, influence the free vibration and dynamic response of these panels. Findings indicate that increasing light intensity and electric field strength have reductive effects on the fundamental frequency of the structure, with flatter panels more susceptible to dynamic instability. Furthermore, the central angle of the circular arc in the ATAC significantly influences the fundamental frequency. In highly curved panels, the frequency increases considerably as the angle rises to approximately 30° due to enhanced extensional stiffness from auxetic behavior, whereas in flatter panels, it decreases steadily owing to a reduced effective Young’s modulus and diminished curvature contribution.</p>