Semiconductor nanocrystal display materials and display apparatus employing same

A display screen having a display surface that is divided into a plurality of pixel regions, comprising:

• a substrate having a first major surface and a second major surface opposite the first major surface, said first major surface being said display surface;
• and
• a plurality of light emitting nanocrystals disposed beneath said first major surface of said substrate within each of said plurality of pixel regions, individual ones of said plurality of nanocrystals comprising,
• a core comprised of a semiconductor material selected from the group consisting of a Group II-VI semiconductor material, a Group III-V semiconductor material, a Group I-VII semiconductor material, a Group IV semiconductor material, and combinations thereof, said semiconductor material being doped with a luminescent center;
• and
• individual ones of said plurality of nanocrystals further comprising a surface covered with a layer of passivation;
• wherein
• a majority of said plurality of nanocrystals have dimensions in the range of about one nanometer to about 10 nanometers.

A method for fabricating a display screen having a display surface that is divided into a plurality of pixel regions, comprising steps of:

• providing a substrate having a first major surface and a second major surface opposite the first major surface, said first major surface being said display surface;
• depositing a plurality of light emitting nanocrystals at least within each of said pixel regions, individual ones of said plurality of nanocrystals comprising a core comprised of a doped semiconductor material selected from the group consisting of a Group II-VI semiconductor material, a Group III-V semiconductor material, a Group I-VII semiconductor material, a Group IV semiconductor material, and combinations thereof, said core further comprising a surface covered with a layer of passivation, wherein said plurality of nanocrystals have dimensions selected for providing a size quantization effect;
• and
• heating said substrate for entrapping deposited light emitting nanocrystals within a portion of said substrate that is adjacent to and that underlies said first major surface within each of said pixel regions.