The structural tunability and optical and thermal properties allured interest in hybrid perovskites. (PEA)2CuCl4 a lead-free 2D organic-inorganic hybrid perovskite of band gap 2.91eV, was synthesised, and its optical and electrical characterisations were reported in this work. The temperature-depended optical characteristics show a shift in absorbance and transmittance, indicating the thermochromic nature of the material due to the non-rigid copper ion and subsequent Jahn-Teller distortion arising on heating. The morphological analysis confirmed uniformity of (PEA)2CuCl4 thin film. The structural analysis confirmed that the material belonged to an orthorhombic non-centrosymmetric crystal structure, and the hysteresis loop obtained in capacitance versus applied voltage characteristics supported the ferroelectric behaviour of the material. Current versus voltage characteristics of (PEA)2CuCl4 show resistance switching behaviour promising for memory device application. The switching behaviour was analysed in light and dark environments. The light environment enhanced resistance switching in the material.