German prolong life LED new technology development

It is reported that the use of LED is more and more widely, but the production of white leds two methods is not high cost, short service life of the product is, limits the development of the industry.Recently, in nuremberg, Germany -- researchers at the university of erlangen using fluorescent protein materials, developed a new production technology, made the production of white leds is both simple and cheap, and safe environmental protection, but also make the product significantly extend the service life.

Compared with incandescent lamps, halogen lamps and other lighting material, white leds have long service life, high efficiency, environmental protection and the advantages of easy maintenance, but the disadvantage is that the price on the high side, this is mainly caused by the production process is relatively complex.White leds production there are usually two ways: one is on the surface of blue LED coated with phosphor or rare earth inorganic material, this production of white LED long service life, the brightness is good, but the process is more complex, and the high cost;Another is the use of organic leds, between the two electrodes embedded like a sandwich of multiple organic semiconductor layer, this process is relatively simple, but the product brightness and life to poor.

An ideal approach is to combine these two processes, Nuremberg - Erlangen University researchers is based on this idea to conduct research. Professor 绍内瓦尔德 synthetic biology professor Dr. Costa and advanced materials engineering at the University of cooperation, invented a simple and inexpensive production process. They fluorescent protein coated onto a rubber material, and then embedded into the LED. Costa said fluorescent protein both environmentally friendly and inexpensive, but also easy to color, color or white can be controlled. The only flaw is a fluorescent protein only in a buffered aqueous solution was stable, so can not be applied in a conventional coating process. In addition, the researchers also have to solve the problem fluorescent protein stability at high temperatures, humidity and other different environments.

To this end, the researchers developed a new coating technology.They will fluorescent protein coated on a gelatinous material, the gel by protein solution and a blend of polymer composition, polymer's role is to make the protein solution to connect to the net on the gel, and maintain the necessary humidity.They make through vacuum drying gel into a kind of rubber material, and then the multi-layer coating for white leds.Ke starr said they used this method made the long life, high efficiency, environmental protection and cheap white leds.He said it was a production process is expected to be applied to the next generation of leds in the industrialized production.