High efficiency deep green light emitting diode

Crystalplex has developed novel semiconductor nanocrystal technology that can be a platform solution to meet the Army's desire for a light emitting diode (LED) with enhanced output in the deep green region using nanoparticles. This innovation produces an efficient deep green (555-585 nm) nanoparticle emitter capable of sustaining the Army's stated goal of 120 lumens per watt of input power. Crystalplex has developed composition-tunable (CT) quantum dots - a unique, patented quantum dot with the potential to create LEDs with enhanced output. Crystalplex tunes its quantum dot colors by building semiconductor element gradients (alloy gradients) in the core, not by core diameter. Color is tuned by the effective mass of the exciton, not by quantum confinement. Thus, all colors have the same size, mass, photostability, electrochemical stability and quantum properties. CT quantum dots have several potential advantages over standard quantum dots for LED applications. CT technology can be adapted to produce non-spherical nanostructures. In Phase I of this project, Crystalplex will develop models of alloy-gradient quantum rods and alternate shapes with inherent dipoles, conductive shells and conductive ligands for non-radiative coupling to a quantum well structure. This will provide a theoretical framework for development of efficient solid state white lighting.