UVLED Double Breakthrough: Revolutionary Leap in Efficiency and Wavelength
With the continuous innovation of ultraviolet sterilization technology, the UVLED industry has ushered in two key technological breakthroughs. Nichia Chemical and BUV have respectively cut into quantum efficiency and core sterilization bands, pushing UVLED technology to new heights and injecting strong momentum into the development of the industry.
Nichia Chemical recently announced that its deep ultraviolet LED product NCSU434D has achieved a major breakthrough. At an input current of 350mA, the product's radiation flux reaches 135mW, and the external quantum efficiency (EQE) is increased to 7.4%, setting a record in the industry, and the efficiency is nearly 2.5 times higher than three years ago. The significant improvement in external quantum efficiency makes NCSU434D excellent in energy efficiency. It can not only greatly increase the ultraviolet radiation output at the same input power, but also reduce the input power while maintaining the same ultraviolet output. At the same time, by optimizing the ultraviolet radiation method and combining the advantages of LED miniaturization and radiation distribution, the utilization rate of ultraviolet rays is further improved. In terms of power parameters, NCSU434D increases the maximum forward current of the traditional 434 series from 500mA to 700mA, and the maximum output power of a single package from 191mW (at 500mA) to 263mW (at 700mA), which can meet the needs of medical, industrial and other fields for high-power deep ultraviolet light. Higher power output and energy efficiency are also in line with the global carbon neutrality goal, and are expected to reduce carbon emissions from equipment operation in large-scale sterilization and curing scenarios, and replace traditional mercury lamps in water and air disinfection, paint curing and other fields.
In terms of core sterilization band technology, the BUV R&D team has made important progress. Traditional mercury lamps are mainly based on 254nm or 313nm ultraviolet rays, which are not the best bands for microbial nucleic acid absorption; the current mainstream ultraviolet LEDs in the market mostly use a 275nm wavelength. Although the sterilization effect is slightly better than that of mercury lamps, the technical difficulty and yield limit the efficiency improvement. Based on the V1 version chip with excellent reliability and high light efficiency Pro packaging technology, BUV has successfully achieved mass production of 265nm core sterilization band devices through deep ultraviolet epitaxial technology optimization, chip process reconstruction and structural design improvement, and proposed the concept of "peak sterilization band". At a wavelength of 265nm, the absorption coefficient of pathogens to ultraviolet rays reaches a peak. Compared with other wavelength UV devices, under the same current, brightness and ultraviolet dose conditions, it can kill more types of pathogens, and achieve a qualitative breakthrough in sterilization efficiency. Relying on the Pro packaging technology of the V1Pro series, the light efficiency, reliability and stability of the device are improved simultaneously.
The technological breakthroughs of Nichia and BUV have not only surpassed traditional technologies in quantum efficiency and core sterilization bands, but also brought new possibilities for the development of the UVLED industry from multiple dimensions such as energy efficiency and expansion of application fields. They are expected to reshape the industry landscape and lead the continuous advancement of UVLED technology.
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