A recent research project funded by the European Union, code-named NEWLED, with an investment of $15 million, will explore new ways to create white LEDs that do not require phosphors, with the goal of developing high-efficiency, high-brightness monolithic or hybrid semiconductor white GaN-based LEDs.
The NEWLED project began in November 2012 and will run for four years under the title "Short-cycle superlattices and quantum dots for nano-efficient white LEDs". The project is led by the University of Dundee in the UK and consists of 13 partners from European industry and academia. The goal of the project is to develop a phosphor-free LED structure with increased brightness (transmitter power per corner per corner), and if successful, will avoid the use of phosphor conversion and reduce the power loss of different aging rates of GaN LED pumps.
NEWLED will enhance the efficiency of the yellow-indium gallium-aluminum-phosphorus/arsenide-aluminum-gallium LEDs using a bandgap-engineered superlattice. These LEDs will replace LEDs that use phosphor conversion. In addition, the new light extraction method will target advanced directionality and color adjustment. The new method will achieve 50% to 60% improvement in the overall efficiency of warm white LEDs, a conversion rate greater than 200 lm / W target and a color rendering index (CRI) greater than 95. At the same time, the team will also study advanced packaging for efficient heat dissipation and efficient lighting management. These devices will be used directly in the automotive, industrial lighting and display industries. Broadly implemented, it will show its economic and environmental benefits, which will reduce global energy consumption by about 10% and carbon dioxide emissions by 3 billion metric tons.
Professor Edik Rafailov, head of the NEWLED project, said: "The energy efficiency conversion rate of commonly used bulbs is quite low today. Even the best white LEDs in use are only about 25% overall efficiency. Our goal is to develop a significant and more efficient The white LED, the energy efficiency conversion rate is about 50~60%. If we can do this and use it widely, then the impact on energy consumption will be huge."
The NEWLED project began in November 2012 and will run for four years under the title "Short-cycle superlattices and quantum dots for nano-efficient white LEDs". The project is led by the University of Dundee in the UK and consists of 13 partners from European industry and academia. The goal of the project is to develop a phosphor-free LED structure with increased brightness (transmitter power per corner per corner), and if successful, will avoid the use of phosphor conversion and reduce the power loss of different aging rates of GaN LED pumps.
NEWLED will enhance the efficiency of the yellow-indium gallium-aluminum-phosphorus/arsenide-aluminum-gallium LEDs using a bandgap-engineered superlattice. These LEDs will replace LEDs that use phosphor conversion. In addition, the new light extraction method will target advanced directionality and color adjustment. The new method will achieve 50% to 60% improvement in the overall efficiency of warm white LEDs, a conversion rate greater than 200 lm / W target and a color rendering index (CRI) greater than 95. At the same time, the team will also study advanced packaging for efficient heat dissipation and efficient lighting management. These devices will be used directly in the automotive, industrial lighting and display industries. Broadly implemented, it will show its economic and environmental benefits, which will reduce global energy consumption by about 10% and carbon dioxide emissions by 3 billion metric tons.
Professor Edik Rafailov, head of the NEWLED project, said: "The energy efficiency conversion rate of commonly used bulbs is quite low today. Even the best white LEDs in use are only about 25% overall efficiency. Our goal is to develop a significant and more efficient The white LED, the energy efficiency conversion rate is about 50~60%. If we can do this and use it widely, then the impact on energy consumption will be huge."
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