Electrochromic multi-layer devices with spatially coordinated switching

A method of forming an electrochromic device, comprising:

• forming a first electrically conductive layer on a first substrate, and a first electrode layer on the first electrically conductive layer, wherein the first electrode layer comprises a first electrochromic material:
• forming a second electrically conductive layer on a second substrate, and a second electrode layer on the second electrically conductive layer, wherein the second electrode layer comprises a second electrochromic material, and
• coupling the first and second electrodes together using an ion conductor layer located between the first and second electrodes to form the electrochromic device,
• wherein:
• the electrochromic device is switchable from a more transmissive state to a less transmissive state;
• the first and second electrically conductive layers have sheet resistances to the flow of electrical current through the first and second electrically conductive layers that vary as a function of position in the first and second electrically conductive layers, respectively;
• and
• the sheet resistances of the first and second electrically conductive layers are asymmetric to one another and cause the electrochromic device to have a directional switch.