Researchers in South Korea and USA have been developing graded-composition superlattice electron-blocking layers (GSL-EBLs) for nitride semiconductor light-emitting diodes (LEDs) [Jun Hyuk Park et al, Appl. Phys. Lett., vol103, p061104 ...
Tags: LED, droop GaN EBL, Electrical, Electronics, nitride semiconductor
Researchers in China and Turkey have been using varying-thickness gallium nitride (GaN) barriers between indium gallium nitride (InGaN) multiple quantum wells (MQWs) to improve hole distributions and thus to reduce efficiency droop effects ...
Tags: InGaN LEDs, Electrical, Electronics
Peking University has found that using a pre-strain layer in nitride semiconductor epitaxial structures designed for blue laser diodes (LDs) can reduce the efficiency-sapping quantum-confined Stark effect (QCSE) [Cao Wen-Yu et al, Chin. ...
It is reported that Hong Kong University of Science and Technology (HKUST) has developed silicon substrate green and yellow nitride semiconductor LEDs. Details of the development were published in the May 29th issue of IEEE Electronic ...
Tags: HKUST, Lighting, Semiconductor, LED
Northwestern University's Center for Quantum Devices has developed a suface-plasmon (SP) enhancement technique for ultraviolet (UV) light-emitting diodes (LEDs) produced on silicon substrates [Chu-Young Cho et al, Appl. Phys. Lett., vol102, ...
Tags: UV-LEDs, Electrical, Electronics
LayTec AG of Berlin, Germany (which makes in-situ metrology systems for thin-film processes, focusing on compound semiconductor and photovoltaic applications) says that, in his invited talk at the LED Technology Forum in Singapore (7-10 ...
Tags: LayTec, Singapore's IMRE
A transnational team of researchers has reported the first electrically pumped exciton-polariton laser device using an arsenide semiconductor microcavity [Christian Schneider et al, Nature, vol. 497, p348, 2013]. The team was variously ...
Tags: Electrical Pumping, Electrical, Electronics
Valence Process Equipment, Inc. (VPE) has announced the commercial release of the VPE GaN-500 MOCVD system, a new metal organic chemical vapor deposition (MOCVD) system for production of high-brightness light emitting diodes (LEDs). The VPE ...
Tags: LED industry, LED
Researchers based in China and Sweden have proposed fast chemical vapor deposition (CVD) of graphene as a route to more cost-effective transparent conducting layers (TCLs) for nitride semiconductor light-emitting diodes (LEDs) [Xu Kun et ...
Researchers in China have used strain engineering to improve the light output power of 530nm green light-emitting diodes (LEDs) by 28.9% at 150mA current injection [Hongjian Li et al, Appl. Phys. Express, vol6, p052102, 2013]. The research ...
Taiwan National Tsing Hua University has been studying ways to improve the modulation performance of high-output-power nitride semiconductor light-emitting diodes (LEDs) [Chien-Lan Liao et al, IEEE Electron Device Letters, published online ...
Tags: GaN InGaN LEDs, LED, Electrical, Electronics, taiwan
Gwangju Institute of Science and Technology and Samsung Electronics Co Ltd of South Korea have developed a zinc oxide (ZnO) nanorod (NR) process for improving light extraction from gallium nitride (GaN) light-emitting diodes (LEDs) by up to ...
Tags: GaN, LEDs, Electronics
Researchers in South Korea have developed a new gold-doping process for graphene transparent conducting layers (TCLs) that improves its adhesion and electrical contact with near-ultraviolet light-emitting diodes (NUV-LEDs) [Chu-Young Cho et ...
Tags: NUV-LEDs GaN Graphene, Electrical, Electronics, LED
A major challenge of in-situ metrology on single-port reactors with small viewport geometries is the combination of curvature measurements (by blue laser) with reflectance measurement at a wavelength of 405nm, says LayTec AG of Berlin, ...
Tags: LayTec, blue laser, reflectance measurement
Every LED maker wants to know the emission wavelength of its final device during metal-organic chemical vapour deposition (MOCVD) growth, says LayTec AG of Berlin, Germany (which makes in-situ metrology systems for thin-film processes, ...
Tags: LED maker, LED, LED structures, lighting