LEDs & OLEDs

Technologies | LEDs | Light Generation | Sep 15, 2017
Tracing the Light Inside an LED
Tracing the Light Inside an LED The performance of white LEDs can be improved, based on better knowledge of the absorption and scattering of light inside the LED. A new method, developed by the University of Twente in The Netherlands and Philips Lighting, can lead to efficiency improvement and powerful design tools. Read more »
Technologies | OLEDs | Flexible OLEDs | Sep 21, 2017
OLEDs Applied to Paper-Thin Stainless Steel
OLEDs Applied to Paper-Thin Stainless Steel Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, a provider of R&D in the field of organic electronics, will be presenting OLEDs on gauzy stainless steel foil during aimcal 2017 in Tampa/USA, from October 15-18, 2017. The novel application on display in Booth 22 was developed in cooperation with the Nippon Steel & Sumikin Materials Co., Ltd. (NSMAT) and Nippon Steel & Sumitomo Metal Corporation (NSSMC). Read more »
Technologies | LEDs | Light Generation | Automotive | Oct 02, 2017
Eviyos LED Prototype Revolutionizes Smart Headlights
Eviyos LED Prototype Revolutionizes Smart Headlights The Eviyos prototype developed by Osram Opto Semiconductors is the world’s first hybrid LED and represents major progress toward the first market-ready smart controllable high-resolution LED. As soon as oncoming traffic is detected the appropriate pixels are automatically switched off so drivers of oncoming vehicles are not dazzled. The prototype, integrated in a demonstrator from Osram Specialty Lighting, were on show for the first time at ISAL from September 25 through 27, 2017 in Darmstadt. Read more »
Technologies | LEDs | Light Generation | Dec 13, 2017
Atomistic Calculations Predict that Boron Incorporation Increases the Efficiency of LEDs
Atomistic Calculations Predict that Boron Incorporation Increases the Efficiency of LEDs High-power white LEDs face the same problem that Michigan Stadium faces on game day -- too many people in too small of a space. Of course, there are no people inside of an LED. But there are many electrons that need to avoid each other and minimize their collisions to keep the LED efficiency high. Using predictive atomistic calculations and high-performance supercomputers at the NERSC computing facility, researchers Logan Williams and Emmanouil Kioupakis at the University of Michigan found that incorporating the element boron into the widely used InGaN (indium-gallium nitride) material can keep electrons from becoming too crowded in LEDs, making the material more efficient at producing light. Read more »
Technologies | Light Generation | Phosphors | Feb 22, 2018
Supercomputers Aid Discovery of New, Inexpensive Material to Make LEDs with Excellent Color Quality
Supercomputers Aid Discovery of New, Inexpensive Material to Make LEDs with Excellent Color Quality A team led by engineers at the University of California San Diego has used data mining and computational tools to discover a new phosphor material for white LEDs that is inexpensive and easy to make. Researchers built prototype white LED light bulbs using the new phosphor. The prototypes exhibited better color quality than many commercial LEDs currently on the market. Read more »
Technologies | Light Conversion | LEDs | Quantum Dots | Feb 26, 2018
Realizing Highly Efficient QD LEDs with Metallic Nanostructures at Low Cost
Realizing Highly Efficient QD LEDs with Metallic Nanostructures at Low Cost The Korea Advanced Institute of Science and Technology (KAIST) announced that a team of their researchers have discovered a technology that enhances the efficiency of Quantum Dot LEDs. Professor Yong-Hoon Cho from the Department of Physics and his team succeeded in improving the efficiency of Quantum Dot (QD) Light-Emitting Diodes (LEDs) by designing metallic nanostructure substrates. Read more »
Technologies | Light Generation | LEDs | Color LEDs | Mar 29, 2018
Scientists Reveal the Fundamental Limitation of In Concentration in InGaN Solid-State Devices
Scientists Reveal the Fundamental Limitation of In Concentration in InGaN Solid-State Devices For the first time an international research group has revealed the core mechanism that limits the indium (In) content in indium gallium nitride ((In, Ga)N) thin films - the key material for blue light emitting diodes (LED). Increasing the In content in InGaN quantum wells is the common approach to shift the emission of III-Nitride based LEDs towards the green and, in particular, red part of the optical spectrum, necessary for the modern RGB devices. The new findings answer the long-standing research question: why does this classical approach fail, when we try to obtain efficient InGaN-based green and red LEDs? Read more »
Technologies | LEDs | Micro-LEDs | Light Generation | Special Applications | Displays | Jun 19, 2018
KAIST Team Develops Flexible Blue Vertical Micro LEDs
KAIST Team Develops Flexible Blue Vertical Micro LEDs In CES 2018, micro LED TV was spotlighted as a strong candidate for replacing the active-matrix organic light-emitting diode (AMOLED) display. Micro LED is a sub-100 um light source for red, green and blue light, which has advantages of outstanding optical output, ultra-low power consumption, fast response speed, and excellent flexibility. Professor Keon Jae Lee from the Department of Materials Science and Engineering and his team have developed a low cost production technology for thin-film blue flexible vertical micro LEDs (f-VLEDs). Read more »
Technologies | Research Reports | LEDs | Manufacturing | Jul 12, 2018
InteGreat Project Successfully Researched New Approaches to LED Production
InteGreat Project Successfully Researched New Approaches to LED Production In the InteGreat research project, Osram Opto Semiconductors coordinated a consortium comprising seven partners from science and industry. Between December 2014 and February 2018 the project partners investigated time-honored manufacturing approaches and know-how along the entire LED production process with the aim of identifying potential areas for optimization. The new insights allow for LED products to be given additional superior properties that would have been difficult or even impossible to achieve with the technologies previously used to produce LEDs. Read more »
Technologies | Research | LEDs | Quantum Dots | Light Conversion | Jul 19, 2018
Liquid-Suspended White QD LEDs Achieve Luminous Efficacy Record
Liquid-Suspended White QD LEDs Achieve Luminous Efficacy Record Quantum dot (QD) white LEDs that show a luminous efficacy of 105 lm/W have been developed. The QDs are liquid-based and, according to researchers, could help the LEDs achieve an efficacy double that of LEDs that incorporate quantum dots in solid films. With further development, researchers say the new LEDs could reach an efficacy over 200 lm/W. Read more »
Technologies | Light Generation | OLEDs | Special Applications | Displays | Aug 07, 2018
Electron Beam Patterning for Full-Color HR OLED Displays
Electron Beam Patterning for Full-Color HR OLED Displays OLED microdisplays are increasingly establishing themselves in consumer-ready wearables and data glasses. In order to meet the requirements for higher efficiency, higher contrast, and higher resolutions in these applications, Fraunhofer FEP scientists have developed a new micropatterning approach for OLEDs on silicon substrates. This might eliminate the use of color filters and shadow masks in the future and allow full-color displays to be developed by means of a new process. An increase in efficiency and considerably broader color gamut have already been demonstrated in first experiments. Read more »
Technologies | LEDs | RGB LEDs | Controls | Driver IC | Oct 09, 2018
Dynamic In-Car Lighting Scenarios - Osram's Osire E4633i Prototype with Inova's Serial Control Driver
Dynamic In-Car Lighting Scenarios - Osram's Osire E4633i Prototype with Inova's Serial Control Driver The more autonomous a car becomes, the more the way in which it is used will change. As developments continue toward autonomous driving, more and more attention is being focused on the passenger cell. Light will become an integral part of the passenger cell, taking on functional and design-specific tasks. Previously static light, which could only be switched on and off, has now been given a dynamic dimension with the prototype of the Osire E4633i – with countless design options for car manufacturer. Read more »
Technologies | Research | LEDs | Light Generation | Light Conversion | Oct 11, 2018
Spanish Researchers Develop Sand that Produces White Sun-Like LEDs
Spanish Researchers Develop Sand that Produces White Sun-Like LEDs The team led by the chemist-technologist Rubén Costa of IMDEA Materials (Madrid) and the chemists Jesús Berenguer of the University of La Rioja and Javier García of the University of Alicante has overcome one of the biggest obstacles in the progress towards new sources of healthier artificial lighting. Read more »
Technologies | Research | LEDs | Light Conversion | Machine Learning | Oct 23, 2018
New Algorithm Can More Quickly Predict Phosphor Materials for LEDs
New Algorithm Can More Quickly Predict Phosphor Materials for LEDs Jakoah Brgoch, assistant professor of chemistry at the University of Houston, and members of his lab published a paper on Oct. 22 in Nature Communications describing how machine learning speeds discovery of new materials. By scanning a huge number of compounds for their key attributes they were looking for a new light conversion material that could be used in white LEDs. Read more »
Technologies | Research | LEDs | Perovskite | Light Generation | Nov 22, 2018
Researchers Push Perovskite LEDs' Efficiency To Rivaling Best OLEDs
Researchers Push Perovskite LEDs' Efficiency To Rivaling Best OLEDs Compared to OLEDs, which are widely used in high-end consumer electronics, the perovskite-based LEDs, developed by researchers at the University of Cambridge, can be made at much lower costs, and can be tuned to emit light across the visible and near-infrared spectra with high colour purity. Now, researchers have set a new efficiency record for LEDs based on perovskite semiconductors, rivalling that of the best Organic LEDs (OLEDs). Read more »
Technologies | Research | LEDs | Light Conversion | IR-LEDs | Quantum Dots | Dec 13, 2018
Colloidal Quantum Dots Make LEDs Shine Bright in the Infrared
Colloidal Quantum Dots Make LEDs Shine Bright in the Infrared ICFO researchers report on the development of a colloidal quantum-dot light emitting diode with unprecedented quantum and power conversion efficiencies in the infrared range. The ideal optoelectronic semiconductor material should be a strong light emitter i.e. should emit light very efficiently upon optical excitation as well as be an efficient charge conductor to allow for electrical injection in devices. These two conditions when met can lead to highly efficient light emitting diodes as well as to solar cells with the possibility to approach the Shockley-Queisser limit. Until now the materials that have come close to meeting these conditions have been based on epitaxially-grown costly III-V semiconductors that cannot be monolithically integrated to CMOS electronics. Read more »
Technologies | Research | Solid State Lighting | Light Generation | Perovskite | Jan 25, 2019
The Possible Future of Lighting - Paint-On Semiconductors from Ornate Quantum Physics
The Possible Future of Lighting - Paint-On Semiconductors from Ornate Quantum Physics LED lights and monitors, and quality solar panels were born of a revolution in semiconductors that efficiently convert energy to light or vice versa. Now, next-generation semiconducting materials are on the horizon, and in a new study, researchers have uncovered eccentric physics behind their potential to transform lighting technology and photovoltaics yet again. Read more »
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