Abstract

Chromogenic materials can be used to regulate the throughput of radiant energy in response to dynamic needs. Among the potential large-area applications, we note windows in buildings and cars. Chromogenics encompasses photochromies, thermochromies electrochromics and certain liquid-crystal-based light shutters. Most chromogenic devices incorporate thin films of nonconventional materials. This paper attempts to give a survey of the worldwide R&D efforts on chromogenics, with emphasis on electrochromic and thermochromie thin films. For example, we discuss electrochromics-based laminated all-solid state devices containing LLWO₃ and Li_yNiO_z films, and thermochromie VO_xF_y films.

© 1989 Optical Society of America