화학공학소재연구정보센터
Electrochimica Acta, Vol.297, 223-229, 2019
Preparation of monolayer hollow spherical tungsten oxide films with enhanced near infrared electrochromic performances
In this study, monolayer hollow spherical tungsten oxide (WO3) films have been prepared for the first time by magnetron sputtering combined with the colloidal crystal template method. Due to the large specific surface area, short ion diffusion distances, and weak scattering of the monolayer hollow structure, the hollow spherical WO3 film exhibits excellent electrochromic performance. This includes high transmittance modulation in the near-infrared spectral range (78.8% at lambda = 1000 nm), fast switching response time (2.41 s for coloration and 1.28 s for bleaching), and high coloring efficiency (102.9 cm(2) C-1) at 1000 nm. The results show that the hollow spherical WO3 film can effectively regulate incident light, especially in the near infrared band, which is not visible but has significant thermal effects. (c) 2018 Elsevier Ltd. All rights reserved.