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
Resist composition for negative tone development and pattern forming method using the same
Methods and apparatus to use window alignment information to process acknowledgment information associated with transmitted data blocks
One-step synthesis of monodisperse AU-CU nanocubes
Adenylyl cyclase-associated protein (CAP1) and uses thereof as a target for immuno-modulation
Enhancement of LED light extraction with in-situ surface roughening
Beamforming training techniques for MIMO systems
Radiofrequency local communication interface between a mobile phone and a contactless reader
  Randomly Featured Patents
Servo control system and method of setting
Amorphos core/coil assembling apparatus
Image forming apparatus with control of transfer charge
Parallel high-speed communication links with redundant channel architectures
Method of producing brassinosteroids
Coatings for ferrous substrates
Process and materials for making contained layers and devices made with same
Controlled wireless access to a local area network
Controlling activity levels and reducing infrastructure data transmission costs for wireless mobile devices
Fuel cell with storable gas generator