Full color display structures using pseudomorphic cladded quantum dot nanophosphor thin films
First Claim
Patent Images
1. A p-n junction electroluminescent (EL) device, comprising successive multiple layers of:
- a semiconductor-on-insulator substrate;
a first p-type Si layer grown on said substrate, part of said Si layer being patterned to produce electrically isolated Si electrodes at the bottom of said device;
a thin layer of Si thinner than the substrate which allows further epitaxial growth;
a second p-type semiconductor layer grown epitaxially, said second layer having an energy gap larger than both said first Si layer and a pseudomorphic cladding of the quantum dot nanocrystal (CNCs) layer;
a layer comprising pseudomorphic cladded quantum dots nanocrystals (CNCs) with both cladding and core semiconductors having narrower energy gap than said second p-type layer for electroluminescence;
an n-type semiconductor layer thinner than the substrate, wider energy gap than the cladding and core layers of cladded quantum dot nanocrystals (CNCs) grown on said CNC layer; and
a metal layer forming a plurality of top contact electrodes deposited on the n-type wide energy gap semiconductor layer having patterned regions to confine current conduction in pixels of said EL device.
0 Assignments
0 Petitions
Accused Products
Abstract
This invention discloses novel device structures for full color flat panel displays utilizing pseudomorphically cladded quantum dot nanocrystals. Different colors are obtained by changing the core size and composition of the quantum dots while maintaining a nearly defect-free lattice at the core-cladding interface. Light emission from the quantum dot core is obtained either by injection or by avalanche electroluminescence. A nanotip emitter device is also presented. These generic devices can be addressed using a variety of conventional display drivers, including active and passive matrix configurations.
60 Citations
27 Claims
-
1. A p-n junction electroluminescent (EL) device, comprising successive multiple layers of:
-
a semiconductor-on-insulator substrate; a first p-type Si layer grown on said substrate, part of said Si layer being patterned to produce electrically isolated Si electrodes at the bottom of said device; a thin layer of Si thinner than the substrate which allows further epitaxial growth; a second p-type semiconductor layer grown epitaxially, said second layer having an energy gap larger than both said first Si layer and a pseudomorphic cladding of the quantum dot nanocrystal (CNCs) layer; a layer comprising pseudomorphic cladded quantum dots nanocrystals (CNCs) with both cladding and core semiconductors having narrower energy gap than said second p-type layer for electroluminescence; an n-type semiconductor layer thinner than the substrate, wider energy gap than the cladding and core layers of cladded quantum dot nanocrystals (CNCs) grown on said CNC layer; and a metal layer forming a plurality of top contact electrodes deposited on the n-type wide energy gap semiconductor layer having patterned regions to confine current conduction in pixels of said EL device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification