Light active sheet and methods for making the same

DETAILED DESCRIPTION The present invention is intended to overcome the drawbacks of the prior art.
It is an object of the present invention to provide methods for manufacturing solid-state light active devices.
It is another object of the present invention to provide device structures for solid-state light active devices.
It is still another object of the present invention to provide a photo-radiation source for the selective polymerization of photo-radiation-curable organic material.
In accordance with an aspect of the invention, a method is provided for forming a sheet of light active material.
A first substrate is provided having a transparent first conductive layer.
A pattern of light active semiconductor elements are formed.
The light active semiconductor elements have an n-side and a p-side.
Each light active semiconductor element has either of the n-side or the p-side in electrical communication with the transparent conductive layer.
A second substrate having a second conductive layer is provided.
The second substrate is secured to the first substrate so that the other of said n-side or said p-side of each said light active semiconductor element in electrical communication with the second conductive layer.
Thus, a solid-state sheet of light active material is formed.
The transparent first conductive layer may comprise a transparent coating preformed on the first substrate.
The transparent coating can be applied as a conductive ink or conductive adhesive.
The pattern of light active semiconductor elements can be formed by electrostatically attracting the light active semiconductor elements to a transfer member.
Then, transferring the attracted light active semiconductor elements from the transfer member to the first substrate.
The transfer member may include an opto-electric coating effective for holding a patterned electrostatic charge.
The patterned electrostatic charge is effective for electrostatically attracting the light active semiconductor elements and forming the pattern of light active semiconductor elements