Results Three devices that can save energy and simultaneously generate electricity were designed. Scattering can be defined as Tyndall,MieorRayleightypesbasedontheinteractionalrelationshipbetweenwavelength of light and size of material, which implies the possibility to size-dependent control the strength of scattering .A finite- difference-time-domain (FDTD) algorithm is useful for designing and investigating a varieties of devices and applications involving the propagation of electromagnetic radiation through complicated media, and was employed to investigate the interaction between VO2 particles and light (Figure 1a). The electric field distribution of different particle sizes with light (Figures 1b through 1f) indicates that light bypasses the particle propagation and that the scattering is so weak at a VO2 particle size of less than 50 nm. However, the scattering is significantly enhanced with an increase in the particle size (i.e., 100 nm, 150 nm, 200 nm and 300 nm). The scattering behavior between VO2 particle arrays and light was further simulated by FDTD to illustrate the potential use of scattered light for electricity generation (Figure2).In this simulation, both the radius of the VO2 particle and the distance between two particles are 100 nm. The scattering of normal incident light in a wavelength range of 350–780 nm along the z-direction and polarised along the y/x-direction was simulated (Figure 2a). The far field angular scattering shown in Figure 2b suggests that the scattering field intensity extended to a far zone, which means the scattering field is obvious and large. The scattering energy distribution in the y-z plane is larger than that in the x-y plane, which changed the transmittance of the film in x-y plane.