Polymer-embedded semiconductor rod arrays
A structure consisting of well-ordered semiconductor structures embedded in a binder material which maintains the ordering and orientation of the semiconductor structures. Methods for forming such a structure include forming the semiconductor structures on a substrate, casting a binder material onto the substrate to embed the semiconductor structures in the binder material, and separating the binder material from the substrate at the substrate. These methods provide for the retention of the orientation and order of highly ordered semiconductor structures in the separated binder material.
1. A structure comprising:
a binder material layer; and
an ordered array of spaced apart semiconductor structures,
wherein each one of the semiconductor structures has a length dimension and wherein the semiconductor structures are conformably constrained along at least a portion of the length dimension of each semiconductor structure within the binder material layer, wherein the diameter of the semiconductor structure is about 1.5 μm to 50 μm and the aspect ratio is greater than 1.
2. The structure according to claim 1 , wherein semiconductor structures are fabricated separately from the binder material layer and are transferred into the binder material layer and wherein the binder material layer maintains the ordering and spacing obtained from the initial fabrication of the semiconductor structures.
3. The structure according to claim 2 , wherein the semiconductor structures are fabricated with shapes with high aspect ratios, wherein the high aspect ratios define orientations among the semiconductor structures and the binder material layer maintains the orientations of the semiconductor structures upon transfer of the semiconductor structures into the binder material layer.
4. The structure according to claim 1 , wherein semiconductor structures are fabricated separately from the binder material layer with an order and spacing and are transferred into the binder material layer and wherein the binder material layer is manipulated to modify the order and/or spacing of the semiconductor structures within the binder material layer.
5. The structure according to claim 4 , wherein the semiconductor structures are fabricated with an order and spacing to provide a first density for the semiconductor structures and the binder material layer is manipulated to provide a second density for the semiconductor structures.
6. The structure according to claim 5 , wherein the second density is chosen for desired optical properties for the structure.
7. The structure according to claim 1 , further comprising an electrically contactive layer, wherein the electrically contactive layer contacts one or more of the semiconductor structures at or near ends of the semiconductor structures.
8. The structure according to claim 1 , wherein binder material layer comprises a flexible material.
9. The structure according to claim 1 , wherein the binder material layer comprises one or more of the following materials: conducting polymer material, insulating polymer material; heat-shrinkable material; and material covalently grown from the semiconductor structures.
10. The structure according to claim 1 , further comprising additional non-ordered semiconductor structures embedded within the binder material layer and electrical contacts to the additional non-ordered semiconductor structures.