compared to traditional low pressure mercury lamp

Furthermore, thanks to rapid decreases in price and market growth in Europe, the US, and China, the CAGR of the global LED lighting market from 2010-2020 to reach 31%, Toshiba Lightech adds.There were two problems in the development of the deep ultraviolet LED: developing a high-quality single-crystal substrate made of AlN, which is the main material, and making a deep ultraviolet LED structure. To solve those problems, a research team was formed by researchers of TUAT, Tokuyama, North Carolina State University and HexaTech Inc.TUAT established a method to rapidly grow high-purity AlN crystal with its own hydride vapor phase epitaxy (HVPE) technology and obtained a basic patent for it is Led high bay light  North Carolina State University and HexaTech developed a technology to form seed crystal with a sublimation technique that enables to grow AlN with a low defect density though deep ultraviolet rays do not pass through it.

This time, the research group realized an AlN substrate that has both a high deep ultraviolet ray transmission rate and a low defect density by using AlN that was rapidly grown with the HVPE technology on AlN seed crystal made with a sublimation technique for the first time in the world. Tokuyama obtained a license to use the HVPE technology, established a volume production technique with it, formed 260nm-band (UV-C) ultraviolet LEDs optimal for use in sterilization on the substrate and confirmed the world's highest levels of output characteristics.Tokuyama will start to let users evaluate the LED within 2013, aiming to commercialize it by fiscal 2015. The company expects that the LED will replace disinfectant mercury lamps used in the fields of medical care, water purification and food manufacturing.A Japanese research team has announced on January 10 that it developed a new efficiently deep ultraviolet sterilization LED lamp, featuring small volume, electricity saving, environmentally and long lasting ,compared to traditional low pressure mercury lamp.

Currently, low pressure mercury lamps are widely used in medical and food application. Because of the environmental harm caused by mercury, researchers are seeking for substitutes.Deep UV is an ultraviolet ray that has short wavelength with high efficient of killing bacteria. And the substrate crystallization has influence on brightness, luminous efficiency and lifetime for deep UV LED lamp of 260 nm wavelength. A research led by Tokyo University of Foreign Studies and Tokuyama chemical company have develop high technology which can make high performance Aluminium Nitride substrate crystallization, to overcome the problem.This new LED lamp can work with Led flood light dry battery, and be used in portable sterilization device and nutrient solution sterilization. The technology has received basic patents from Japan and United States, and is scheduled to be commercial in 2015.Panasonic President Kazuhiro Tsuga stressed the large size, vivid color and slimness of the display in a keynote speech, however, the company has not disclosed when to mass-produce the display or its expected price.

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