Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Type II broadband or polychromatic LEDs










Image Number 4 for United States Patent #8148742.

An LED is provided comprising two or more light-emitting Type II interfaces wherein at least two of the Type II interfaces differ in transition energy by at least 5%, or more typically by at least 10%, and wherein at least one of the Type II interfaces is within a pn junction. Alternately, an LED is provided comprising two or more light-emitting Type II interfaces wherein at least two of the Type II interfaces differ in transition energy by at least 5%, or more typically by at least 10%. The Type II interfaces may include interfaces from a layer which is an electron quantum well and not a hole quantum well, interfaces to a layer which is a hole quantum well and not an electron quantum well; and interfaces that satisfy both conditions simultaneously. The Type II interfaces may be within a pn or pin junction or not within a pn or pin junction. In the later case, emission from the Type II interfaces may be photopumped by a nearby light source. The LED may be a white or near-white light LED. In addition, graphic display devices and illumination devices comprising the semiconductor device according to the present invention are provided.








 
 
  Recently Added Patents
Base station synchronization for a single frequency network
Vehicle, toy, and/or replicas thereof
Estrogen receptor ligands
Inspection tool for top guides of a boiling water reactor
Flexure with insulating layer isolating a portion of a metal substrate
Emergency power-off button with proximity alarm
Position-measuring device
  Randomly Featured Patents
Backlight unit and the display device having the same
Thermochromic opaque composition, laminate member employing the same, and three-dimensional member employing said laminate member and capable of concealing and revealing the interior
Laser perimeter awareness system
Method for manufacturing a bulk material container with support stand therefor
Kickdown control method for automatic transmission
Disposable diaper with cutout pad at tape attachment area
Oxime
aspS
Enhancing color stability to sterilizing radiation of polymer compositions
Shearing blade mount for cut-off die set