Researchers in Korea have used aluminium gallium nitride (AlGaN) heterostructures similar to high-electron-mobility transistors (HEMTs) to create Schottky barrier diodes (SBDs) with increased forward current without damaging the breakdown ...
Tags: aluminium gallium nitride, AlGaN, heterostructures, HEMTs
Researchers in the USA have developed radio frequency switches based on nitride semiconductor voltage-controlled capacitors (varactors) [F. Jahan et al, IEEE Electron Device Letters, 9 January 2013]. The team, consisting of engineers from ...
Tags: radio frequency switches, nitride semiconductor voltage, SET
NTT Basic Research Laboratories in Japan has used hexagonal boron nitride (h-BN) layers to release nitride semiconductor light-emitting diodes (LEDs) from sapphire and transfer them to commercially available adhesive tape [Toshiki Makimoto ...
Tags: LED
Taiwan researchers have used a self-textured oxide mask (STOM) as a template to enhance the external quantum efficiency (EQE) of nitride 380nm ultraviolet (UV) light-emitting diodes (LEDs) by up to 83% [Kun-Ching Shen et al, IEEE Electron ...
Tags: LED light, LED, LED light extraction
Seoul National University and Korea Electronics Technology Institute have been developing hafnium dioxide (HfO2) as a gate insulator for aluminium gallium nitride (AlGaN) metal-oxide-semiconductor high-electron-mobility transistors ...
Tags: HfO2, gate insulator, Lights, Lighting
Researchers in Singapore claim the first DC and microwave performance measurements for 0.15μm-gate aluminium gallium nitride(AlGaN)on gallium nitride high-electron-mobility transistors(HEMTs)on silicon substrates with gold-free ...
Sophia University in Tokyo, Japan, has used nanocolumns of nitride semiconductor to produce different emission color LEDs in a single growth process for what is claimed to be the first time [Katsumi Kishino et al, Appl. Phys. Express, vol6, ...
Tags: Sophia University, LEDs, Sapphire substrates, LEd lighting
Kyma Technologies Inc of Raleigh, NC, USA, which provides crystalline gallium nitride (GaN), aluminium nitride (AlN) and aluminium gallium nitride (AlGaN) materials and related products and services, says that it has demonstrated a 10-inch ...
Tags: Kyma, AlN-on-sapphire, GaN, LEDs
HexaTech Inc of Morrisville, NC, USA has received a $2.2m award from the US Department of Energy (DOE) Advanced Research Projects Agency – Energy (ARPA-E) to enable the development of “new power semiconductor technology for the ...
Tags: power semiconductor technology, Energy, electrical power grid
University of California,Santa Barbara(UCSB)has demonstrated for the first time nonpolar m-plane(10-10)nitride semiconductor vertical-cavity surface-emitting laser(VCSEL)diodes[Casey Holder et al,Appl.Phys.Express,vol5,p092104,2012]. The ...
Tags: nitride semiconducto, VCSEL, electrical
Two Yale University researchers have developed epitaxial distributed Bragg reflectors (DBRs) in nitride semiconductors with reflectivities of more than 98% [Danti Chen and Jung Han, Appl. Phys. Lett., vol101, p221104, 2012]. Further, the ...
Current bright blue LEDs are based on the wide band gap semiconductors GaN (gallium nitride) and InGaN (indium gallium nitride). They can be added to existing red and green LEDs to produce the impression of white light, though white LEDs ...
Researchers from Japan and the USA have reported the first fabrication on hydride vapor phase epitaxy (HVPE) aluminium nitride (AlN) substrates of aluminium gallium nitride (AlGaN) light-emitting diodes (LEDs) that emit at the ...
Tags: DUV, LEDs, AlGaN, AlN substrates, HVPE, light-emitting diodes
Researchers in Korea have developed gold-doped graphene as a transparent and current-spreading electrode (TCSE) for ultraviolet (UV) light-emitting diodes (LEDs). Some of the research group from Chonbuk National University and ...
Tags: UV LED
Deep-ultraviolet (DUV) light is used for sterilization, assisting chemical reactions, and photolithography. The disadvantages of conventional DUV sources such as excimer lasers and mercury-vapor lamps—expense and inclusion of toxic ...
Tags: LED