page_title: Electrochromic devices
section_title: Mode of operation
hierarchical_section_title: Electrochromic devices / Mode of operation
caption_attribution_description: English: Schematic representation of an ECD operating in transmission mode and reflectance mode
context_page_description: An electrochromic device controls optical properties such as optical transmission, absorption, reflectance and/or emittance in a continual but reversible manner on application of voltage. This property enables an ECD to be used for applications like smart glass, electrochromic mirrors, and electrochromic display devices.
context_section_description: Typically, ECD are of two types depending on the modes of device operation, namely the transmission mode and reflectance mode. In the transmission mode, the conducting electrodes are transparent and control the light intensity passing through them; this mode is used in smart-window applications.  In the reflectance mode, one of the transparent conducting electrodes (TCE) is replaced with a reflective surface like aluminum, gold or silver, which controls the reflective light intensity; this mode is useful in rear-view mirrors of cars and EC display devices.
caption: Modes of electrochromic device operation
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