Professor Wen invented new materials to make the white LED lamp longer life

Compared with incandescent lamp, fluorescent lamp, white LED lamp has the advantages of small size, long life, fast response, low power consumption, environmental protection, high luminous efficiency, the use of more and more widely used in life. But the white LED lamp with a long time is easy to deteriorate, lamp aging, resulting in light color deviation, color difference, affecting the quality of lighting and other issues, the general life of 2 to 3 years. In order to solve these problems, Xiang Weidong distinguished professor of Oujiang College of chemistry and materials engineering Wenzhou University invented new materials, can make the LED lamp lifespan of about 10 years, and long time exposure, the LED lamp is more widely used in high-end cars, high-speed rail, aircraft, submarines and other lighting. The day before, the reporter walked into the laboratory of Professor Weidong, to explore this new material in the end what magic.

2000 degrees Celsius to extract a single crystal of yellow light, so that the white LED lamp longer life

Professor Xiang Weidong, now the main technology market is the use of white LED lamps emit blue light chip and the phosphors emit yellow light, both with the combination of white light ab. But the main problem is the existence of this process, bonding phosphor AB is easy to aging, especially when the high temperature lamp fluorescent powder on the long time to let AB binding to lose the original effect, thus affecting the luminous effect of white LED lamps, such as lamp is not bright enough, light blue.

To break this problem, it is necessary to start from the Yellow phosphor. In this regard, Professor Weidong spent years of effort, the yellow light of single crystal materials, the material is in the high temperature of 2000 DEG C environment prepared for production, as long as each LED blue chip placed on a match (for example, 24 watt single light available 5.5mm * 5.5mm crystal, crystal yellow light) materials can emit stable white light. Because the crystal of high temperature resistance, good thermal conductivity and other characteristics, can make the LED lamp more durable, longer service life, especially at high temperature can make the bulb does not produce due to long time irradiation leads to damage, so it is very suitable for use in high-end car headlights, high-speed rail, aircraft or submarine lighting.

The day before, reporters saw in the high temperature furnace in the production of yellow light and yellow light crystal crystal Weidong laboratory, this study successfully for four or five years, is also currently Weidong and relevant enterprises to discuss cooperation. He said, in the production of light yellow crystal, crystal can be controlled by the composition, concentration and thickness, adjust different lighting and color strength, meet the various demands, can also be made into white LED lamps of various lengths and shapes. In addition, Weidong also developed a substitute yellow fluorescent glass another yellow powder, with yellow light yellow light glass crystal, though not so durable, but lower cost, shorter production cycle, these two alternative materials have reached the technical index of the market.

Scientific research cooperation to break through the traditional process, so that the production of LED lights more convenient

Professor Xiang Weidong not only invented the substitute materials, let the white LED lamp is more durable, he and school cooperation, to break through the traditional process, making LED more simple and efficient lamps. He said, now the process of white LED lamp to chip and yellow or yellow crystal powder combination, make two together need to use the glue is not as durable AB glue. So how do not glue, so that the production process is more simple, he came up with a new way, in the yellow light crystal "born" blue chip, that is, to integrate the two into one, no longer need glue. At present, the technology is still in further development.

In addition to trying to break through the traditional process, in order to make the white LED light more soft, he also developed a red crystal red. He said that only the combination of yellow and blue light emitted by the white light, mostly some glare, if the addition of red light, white light can be more soft and comfortable. Currently, he is in the development of how to make yellow crystal and red crystal fusion, just a piece of crystal will be able to achieve the effect of two crystals, the process needs to be further improved.

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