Photoconductive layer with adjustable electrical property

An electrical system comprising:

• an excitation light source;
• a photoconductive layer with electrical property adjustable via control of intensity, location, size, or shape of illumination by the light source, the layer comprising:
• at least one charge generation material distributed within the body of the layer wherein localized change of electrical property in the photoconductive layer arises on and beneath the surface area of the layer illuminated by the light source via actuated bulk change in electrical charge contributed by the charge generation material in the area;
• and
• at least one binder for distributing the charge generation material within the body of the layer;
• and
• at least one electrical component driven by the photoconductive layer upon actuation by the illumination of the light source.