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    • Denggle > Lighting News >

    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

    Source： led-professional.com 03 Apr 2018
    LEDs pDOS Fundamental Limitation

    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?

     

    Scientists Reveal the Fundamental Limitation of In Concentration in InGaN Solid-State Devices

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    The Billy BL Lamp Series by Studioilse for Kalmar Werkstätten

    To celebrate her Designer of the Year award, Kalmar Werkstätten will be showcasing two of British designer Ilse Crawford’s designs. The successful launch of the Billy TL table lamp last year led to Studioilse’s redesign of the Billy BL floor lamp, both of which combine sophistication, luxury, and warmth all in one package. The Billy lamp combines a rosewood stem with a duotone matte-black lampshade… With a sleek brass underside. Its neutral palette elevates any room it’s in, while still preserving a sense of comfort and peace.

    The Macaron Floor Lamp Is the Latest Addition to This Dessert-Inspired Lighting Collection

    A few years ago, Spanish designer Silvia Ceñal introduced the Macaron pendant lamp and now with Lithuanian company EMKO, the Macaron Floor Lamp comes to life. Much like the pendant, the dessert-inspired design merges simple materials, like wood and rope, with the right proportions to create a lively personality. The wooden frame brings a warm feeling while the threaded cord adds a playful touch through color and texture.

    Table Lamp by Jaime Hayón's Josephine

    Lighting brand Metalarte has launched a giant floor-standing version of Spanish designer Jaime Hayón's Josephine table lamp to mark its 10th anniversary.

    Casambi names new CEO, founder to focus on product management

    Finish light control solutions provider Casambi has made changes to its senior management team. Kari Mettälä now serves as Chief Executive Officer (CEO), a move instigated by Founder Timo Pakkala, Casambi’s former CEO, who continues with the company in a product management role.

    Goula/figuera's LED Lamp for Faro Barcelona Doubles As a Coat Hanger

    Lighting company faro barcelona introduced ‘han’, a lamp-coat hanger designed by álvaro goula and pablo figuera. the product is the result of a first collaboration between both spanish studios. ‘when we were asked to design a wall lamp which at the same time had to be a coat hanger.

    Héctor Esrawe Introduces Félix Candela's Parabolas Into Lighting Design

    publish your work esrawe studio (17 articles) esrawe studio introduces félix candela's parabolas into lighting design esrawe studio introduces félix candela's parabolas into lighting designfeb 25, 2019 esrawe studio intervalo furniture collection exhibits at mexico design week esrawe studio intervalo furniture collection exhibits at mexico design weekoct 12, 2018 esrawe designs brass and copper bar at auditorio nacional in mexico city esrawe designs brass and copper bar at auditorio nacional in mexico citysep 21, 2018 nouvel limited reveals blown glass collection by mexican designers at design miami/basel nouvel limited reveals blown glass collection by mexican designers at design miami/baseljun 26, 2018 esrawe studio fits out taquería in mexico city with new interiors and brand identity esrawe studio fits out taquería in mexico city with new interiors and brand identityfeb 25, 2018 popular now design! LE GRAND PRIX DU CARRÉ HERMÈS call-for-entries now open! LE GRAND PRIX DU CARRÉ HERMÈS call-for-entries now open! 27k views 'less and more' illustrates the functional design of dieter rams 'less and more' illustrates the functional design of dieter rams 19k views naoto fukasawa designs 11-piece cutlery set 'itsumo' for alessi naoto fukasawa designs 11-piece cutlery set 'itsumo' for alessi 19k views the polydrop trailer is a lightweight portable living space for comfortable travelling the polydrop trailer is a lightweight portable living space for comfortable travelling 23k views kengo kuma completes the world's largest starbucks reserve roastery in tokyo kengo kuma completes the world's largest starbucks reserve roastery in tokyo 24k views lighting design (224 articles) night book emits warm, soft light when pulled from bookcase night book emits warm, soft light when pulled from bookcasemar 05, 2019 simone crestani turns japanese paintings into glass lighting installations at milan design week simone crestani turns japanese paintings into glass lighting installations at milan design weekfeb 28, 2019 esrawe studio introduces félix candela's parabolas into lighting design esrawe studio introduces félix candela's parabolas into lighting designfeb 25, 2019 kamaro’an weaves lighting and stationary out of umbrella sedge plants kamaro’an weaves lighting and stationary out of umbrella sedge plantsfeb 20, 2019 creative studio idea3di launches levitating marble lamp 'levia' creative studio idea3di launches levitating marble lamp 'levia'feb 11, 2019 322 122 46 50 héctor esrawe has designed lighting fixtures that create a reflection based on how the light travels through a solid surface — from the beginning to the end, through the darkness in the parabolas of félix candela. the path of the light in each of the versions is conditioned by the metal, in its scale, its surface and in its expression, also on its repetition, which builds an architectonic quality for each one of them.

    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.

    Communal Light

    The Tree of Ténéré, a large-scale interactive LED artwork, was recently on display at Burning Man.

    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?

    Veeco Resumes Operation and Updates 1Q20 Business Estimation; Lumileds Reports Price Increases

    Affected by the ongoing COVID-19 pandemic, worldwide businesses continue to update their measures and business outlook in the past weeks. Veeco, who announced withdrawal of its 1Q20 business guidance, provided business update; while LED maker Lumileds reported price increase due to COVID-19.

    Tunable white lighting in the classroom: The new ROI is ROO

    Throughout the past few years, we at LEDs Magazine have seen more solid-state lighting (SSL) product development targeted at educational environments. School officials, especially in the public-school arena, must manage strict budgets and plan strategically to obtain the best return on investment (ROI) possible, so the potential financial implications are important factors — first, the cost of premium equipment and installation, but then balanced against the possible payback due to energy efficiency initiatives and less maintenance. One consideration beyond the established cost reductions of SSL in institutional buildings such as schools is the possible impact of tunable white lighting in the classroom. Naturally, dimmability and other controls features such as granularity of color temperature can be customized to various classroom tasks and increase visual acuity. But what’s becoming even more appealing to educational administrators is the ability to influence less “visible” factors in the classroom, such as mood, behavior, and concentration. Strategies in Light, co-located with The LED Show and Lightspace California, will draw more attention to so-called human-centric lighting applications as this, also known as lighting for health and wellbeing. One such presentation, “Lighting for pupils…Tunable white lighting in the classroom and the new ROI,” by Tricia Foster of Acuity Brands Lighting and Catherine Hollenshead of Estes, McClure & Associates (EMA), will feature a case study on a Texas school district’s first-hand experience using tunable white lighting in several classrooms. Here the speakers give a glimpse into the new classroom experience. They will offer up additional details during SIL on how ROI has evolved into “return on objective” (ROO) in such installations. — Carrie Meadows

    What Famous Brands Do Square Landscape Lights Have

    In some villa courtyard or the road on both sides of the square, square landscape lamp use, you can see the landscape lamp compared with common lamps and lanterns, have better decorative effect, but also can have the effect of environmental protection and energy saving, there are more and more different brands on the market square landscape lamp, users choose is plunged into the difficulty? Because every brand advertising is done very reach the designated position, also blinded the eye of everybody, do not know how to choose a few landscape lights that quality has assure to use. Follow below small make up to understand in detail which brand awareness is higher.

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