Introduction: Xinhua News Agency, Tokyo, May 18th, the newly developed light-emitting diode of Japan Telecom Telephone Company, Institute of Physical Science and Basic Research, uses aluminum nitride crystal as raw material to emit light with a wavelength of 210 nanometers, setting a world record for the shortest wavelength of diode light. .
Previously, the record of the shortest wavelength of light-emitting diodes was 365 nanometers held by GaN crystals, and the record created by scientists has greatly shortened it. And this wavelength of 210 nanometers has entered the ultraviolet rays with the shortest wavelength of ultraviolet rays. section.
The Institute’s Gu Baofang and others published an article in the journal Nature published on the 18th, saying that scientists have theoretically predicted that the wavelength of light emitted by diodes made of aluminum nitride is quite short, but due to the production of aluminum and nitrogen. In the case of crystallization, impurities are easily mixed, so that it is difficult to exhibit the characteristics of a semiconductor. The researchers increased the temperature at which the aluminum nitride crystals were produced, and supplied the raw materials at high speed by spraying to produce high-purity crystals. The square light-emitting diode formed by this crystal has a side length of 250 μm, and after applying an appropriate voltage thereto, it successfully emits a far ultraviolet ray having a wavelength of 210 nm.
Light-emitting diodes are currently widely used in information storage devices such as DVDs. The shorter the wavelength of light used by these devices to read and write information, the greater the amount of information that the device can store. Therefore, the newly developed diode is expected to bring about a renewed increase in the capacity of the storage device. At the same time, the shorter the wavelength of light, the higher the energy, so the light-emitting diode can also be used to decompose harmful substances such as dioxins and polychlorinated biphenyls, and can also be used in the field of nanotechnology.
However, the researchers have only observed that the diode emits far ultraviolet rays, which is still far from being practical. (Reporter Qian Wei)
Previously, the record of the shortest wavelength of light-emitting diodes was 365 nanometers held by GaN crystals, and the record created by scientists has greatly shortened it. And this wavelength of 210 nanometers has entered the ultraviolet rays with the shortest wavelength of ultraviolet rays. section.
The Institute’s Gu Baofang and others published an article in the journal Nature published on the 18th, saying that scientists have theoretically predicted that the wavelength of light emitted by diodes made of aluminum nitride is quite short, but due to the production of aluminum and nitrogen. In the case of crystallization, impurities are easily mixed, so that it is difficult to exhibit the characteristics of a semiconductor. The researchers increased the temperature at which the aluminum nitride crystals were produced, and supplied the raw materials at high speed by spraying to produce high-purity crystals. The square light-emitting diode formed by this crystal has a side length of 250 μm, and after applying an appropriate voltage thereto, it successfully emits a far ultraviolet ray having a wavelength of 210 nm.
Light-emitting diodes are currently widely used in information storage devices such as DVDs. The shorter the wavelength of light used by these devices to read and write information, the greater the amount of information that the device can store. Therefore, the newly developed diode is expected to bring about a renewed increase in the capacity of the storage device. At the same time, the shorter the wavelength of light, the higher the energy, so the light-emitting diode can also be used to decompose harmful substances such as dioxins and polychlorinated biphenyls, and can also be used in the field of nanotechnology.
However, the researchers have only observed that the diode emits far ultraviolet rays, which is still far from being practical. (Reporter Qian Wei)
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