According to reports, the Ohio State University is developing a new type of UV LED, it could bring us more and more portable lamps and low-cost technology .
Ohio State University

The LED whose patent is pending has created the UV wavelength that is more precise than commercial LED ultraviolet on the market and can operate at a lower voltage , which is more brevity than other experimental method that create an accurate ultraviolet wavelength. The LED is suitable for the chemical sensing applications , disinfection applications and UV curing applications . To be further developed, it maybe can provide UV laser eye surgery and computer chip manufacturing with source one day.

In the ” Applied Physics Letters “, the Ohio State University engineers describe how to create a LED. Coauthor from the semiconductor nanowires that mixed with the gadolinium (Gd) that is the rare earth elements, Roberto Myers, Associate Professor of Materials Science and Engineering of the Ohio State University, said: “The unique design allows engineers to give nanowires energized to activate the rare earth metals , and this is that our team previously has not thought, as far as we know, no one has drived the electronics through the gadolinium inside the LED , we just want to know what will happen next . ”
Gadolinium is not used to produce high-quality UV LED, but in order to carry out a simple experiment probing the basic properties of a new material they are studying , the material is called gallium nitride . In this experiment, the doctoral Thomas Kent noted that the intense emission lines of the gadolinium can control the current . Different elements that are excited emits fluorescence at different wavelengths , the fluorescence emitted by gadolinium is most intense . Engineers found that gadolinium doped nanowires shined ultraviolet light in some specific frequencies. What is not unusual that the different materials activated produce light, but the material is difficult to be activated under ultraviolet light-emitting. light emission that only other reported gadolinium can be electrically controlled takes more than 250V voltage. Ohio State University research team found that the same effect can be produced at low operating voltage that is about 10V in the structure of the nanowire LED. It is difficult to compact the high-voltage apparatus , because the voltage of nanowire LED is only 10V , which is helpful to the portable device .

As for the cost , Kent pointed out that their team made the LED grew on a silicon standard wafer, it is cheaper and easier to apply to large-scale industrial production .

The team is currently trying to maximize the efficiency of UV LED , Ohio State University ‘s technology commercialization and knowledge transfer office will issue a license to the design industry and the production of special gadolinium doped nanowire approach.

There are the United States National Science Foundation (NSF) and the Ohio State University ‘s new materials center sponsoring this study.

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