Self-powered and reversible light-directed electrophoretic deposition device for use in smart windows and photodetector displays

A method for using a system, the method comprising:

• providing an electrophoretic deposition (EPD) device comprising:
• a chamber defined between a first sheet and a second sheet and a spacer,
• wherein the first sheet is nonopaque, wherein the first sheet comprises a photoconductive layer, wherein the second sheet is spaced from the first sheet, the second sheet being nonopaque,
• wherein the spacer is positioned between the first sheet and the second sheet, and
• a fluidic solution in the chamber, the solution having a plurality of particles;
• and
• wherein the EPD device is positioned to receive light on the photoconductive layer of the first sheet, wherein the particles in the solution are attracted from suspension in the solution to illuminated portions of the photoconductive layer in the absence of an external voltage applied to the first and second sheets.