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Focus on new hotspots in market segments
With the reshuffle of the general lighting field in 2016, the focus of major companies in 2017 began to shift to the sub-segment. It is estimated that the market value of UVC LED sterilization and purification applications in 2016 will reach 28 million US dollars, and will reach 257 million US dollars in 2021, with a compound annual growth rate of 56%. However, UV-CLED product technology With the reshuffle of the general lighting field in 2016, the focus of major companies in 2017 began to shift to the sub-segment. It is estimated that the market value of UVC LED sterilization and purification applications in 2016 will reach 28 million US dollars, and will reach 257 million US dollars in 2021, with a compound annual growth rate of 56%. However, the technical threshold of UV-CLED products is quite high, and there are many challenges in terms of epitaxial wafer, wafer technology, packaging and market acceptance. However, research reports show that deep ultraviolet LEDs featuring high-tech innovation are widely used. It will become a new hot spot for global LED research and investment. This article will try to explore the development of research and development results in recent years around the world. Europe and the United States RayVio In 2015, RayVio, a global provider of deep-UV LED devices and disinfection systems, announced the achievement of optical power performance records for deep-UV LEDs. According to reports, RayVio Corporation of the United States is a high-tech company founded in 2012 by Dr. Yitao Liao and Dr. Robert Walker. Headquartered in Silicon Valley, California, RayVio Technologies is dedicated to the development and commercial production of UV LEDs and LED-based application modules and systems. RayVio uses a unique deep-UV LED epitaxial technology to achieve a DC output of 550 to 280 nm at 45 mW in a single-chip 0.15 mm2 illuminating area, creating a record of 30 W/cm2 continuous wave optical power density. The company uses a new epitaxial approach that enables it to deliver higher optical power and lower cost than existing products on the market. In July 2016, RayVio's test results for the deep UV UVC LED sterilization solution showed that RayVio deep UV UVC LEDs can kill bacteria in hospitals and home environments faster and more efficiently than the most common sterilization products available today. Further eliminate the risk of mutual infection in the public and family environment. A RayVio deep UV UVC LED kills 99.9999% of methicillin-resistant Staphylococcus aureus (MRSA), Listeria and Salmonella bacteria samples in 60 seconds, while using multiple deep UV UVCLEDs Kill bacteria or kill more bacteria samples. It is reported that using the 285 nm emission wavelength of the RayVio deep UV UVC LED, the researchers irradiated the bacterial sample at a distance of 10 mm and measured the change in the number of bacteria at intervals between 5 and 80 seconds. At 5 seconds, 99.99% of the bacteria were killed. At 60 seconds, 99.9999% of the bacteria were killed. RayVio's deep UV UVC LED technology has the highest bactericidal efficacy per square millimeter in all similar deep UV LEDs. In addition to being small, it can be quickly combined with other applications such as disinfection catheters, doctor's mobile phones and hospital door handles. Contour risk area. Related studies have shown that deep UV UVC LED illumination can kill bacteria more efficiently and more thoroughly than current disinfection solutions. Hospitals often use chemical disinfectants and take several minutes to effectively kill bacteria such as MRSA and Salmonella. Common alcohol hand sanitizers take a minute or more to fully take effect, but the performance can only reach 99.99%. Longer exposure times increase the risk of human error and the inability to fully disinfect. Although the deep ultraviolet light source produced by conventional mercury lamps can be sterilized, they are too bulky, fragile, and contain mercury, a hazardous substance that is restricted in use. In November of the same year, RayVio introduced a portable baby sterilizer, which is said to be small, lightweight and powerful, killing 99.9% of harmful bacteria in 60 seconds, from bottle to pacifier. The molar ring to the small toy can quickly eliminate the surface bacteria, and only 0.9 kg, can be used for one week per charge, can become a portable disinfection cabinet. According to reports, Ellie is the world's first C-end baby sterilizer with TRUVIOLET deep-UV technology, which uses RayVio's latest LED digital chip, which is the first consumer scene product launched by RayVio. The LED chip emits light at deep ultraviolet (UVC) wavelengths and is sterilized in any environment that is fast and does not produce any chemicals. Since the deep-UV LED chip itself is the best for disinfection, RayVio's first product selection portable sterilizer for baby products is also a matter of course. In addition, RayVio is also interested in working with manufacturers in the field of health and health to introduce more deep-UV LED civilian products such as water cups and water purifiers that can be disinfected, forming a true industrial ecology. Cornell University in the United States In early 2017, Cornell University research team developed a small and more environmentally friendly deep ultraviolet LED light source, and set a record for the lowest wavelength of the industry's deep-UV LED. It is reported that UV-C ultraviolet light has a wavelength of only 200 to 280 nm and high energy. It can penetrate the membranes of viruses, bacteria, fungi and dust mites, attack DNA and destroy these harmful organisms. The researchers used a single-layer film of gallium nitride (GaN) and aluminum nitride (AlN) as the reaction area at the atomic-level control interface to successfully emit deep-UV LEDs with wavelengths ranging from 232 to 270 nm. This 232 nm deep ultraviolet light broke the record of 239 nm set by the Japanese team. At present, the biggest bottleneck of UV LEDs is luminous efficiency, which can be measured by three aspects: injection efficiency, internal quantum efficiency (IQE), and light extraction efficiency. For example, the efficiency of the three aspects is 50%, multiplied by only one-eighth, which is equivalent to the luminous efficiency has dropped to 12%. In the deep ultraviolet range, the efficiency of these three aspects is very low, but the research team found that the use of gallium nitride instead of the traditional aluminum gallium nitride can improve the internal quantum efficiency and light extraction efficiency. In order to improve the injection efficiency, the research team used the previously developed technology to implement the polarization induction doping method in the positive (electron) and negative (hole) carrier regions. The application fields of deep ultraviolet light include food preservation, counterfeit banknote discrimination, photocatalyst, and water purification and sterilization. After successfully improving the luminous efficiency of deep-UV LEDs, the research team will integrate the light source into the device and move toward the goal of going public. In addition, OSRAM has reported that OSRAM has developed a strategy to expand the invisible optoelectronics portfolio to the UV-C wavelength range in the field of UV LEDs. On February 15, 2017, it signed two agreements with AlN single crystal substrate supplier HexaTech. Strategic agreement. These agreements include long-term supply agreements and several HexaTech intellectual property (IP) licenses, the former involving aluminum nitride (AlN) substrates that are directly supported by HexaTech's 2-inch (diameter) substrate development project. According to reports, this move will help OSRAM accelerate the development of its UV-CLED devices based on HexaTech materials, making it a leading provider of high-performance optoelectronic technology, offering products ranging from deep ultraviolet wavelengths to infrared wavelengths. China Yuanrong Technology On October 16, 2015, Yuanrong Technology announced that it had acquired 9 shareholders of Zhang Guohua and Shanghai Jiuba, respectively, in cash and share swaps, holding 85.61% equity of Qingdao Jiesheng Electric, deep ultraviolet LED chip. It became the exclusive technology owned by Yuanrong Technology after the acquisition of Qingdao Jiesheng Electric. Deep ultraviolet LED is mainly used in four aspects: air, such as air purification, air conditioning sterilization function; food, such as refrigerator food preservation; water, including tap water, drinking water in the wild rivers, lakes and seas; The direction of people is in the medical system. According to reports, as early as 2013, the global UV LED market has reached 800 million US dollars, and the amplification effect of the entire industry chain is expected to be between 8 billion and 10 billion US dollars. Some analysts pointed out that if this market matures further, the application will expand. On the evening of January 26, 2016, Yuanrong Technology announced that it had passed the test of the state-level certification body of China Hangzhou Yuanfang Testing and Calibration Technology Co., Ltd., and its company's controlling subsidiary Qingdao Jiesheng Electric Co., Ltd. developed 280 nm high power deep. UV-emitting chips, the maximum optical output power of a single chip has set a new world record. This record once again established Yuanrong Technology's leading position in the global solid-state deep ultraviolet light-emitting chip field. It is reported that the 280 nm high-power deep-UV light-emitting chip developed by Qingdao Jiesheng Electric Co., Ltd. has a stable output of 176.6 mW and a voltage of only 5.8 under normal temperature and normal pressure and 1000 mA continuous current. Volt. These excellent electrical characteristics enable the high-power chip to be DC-powered to 1 amp, which is close to the output power saturation. The single chip's highest output power record has far exceeded the recent 100 mW reported by SETI in the United States, and the 90 mW record of Japan's ICT Research Institute and Tokuyama. On October 21, 2016, Yuanrong Technology announced that Qingdao Jiesheng Electric Co., Ltd. officially launched a 10 mW UVC (deep ultraviolet) LED product with a lifespan of 10,000 hours, which is the world leader. According to reports, the company's products include 2 mW, 5 mW and 10 mW of different power files, and products with a power of 30 mW or more will be launched later. Liang Xudong, chairman of Yuanrong Technology and Qingdao Jiesheng, once said that the company's goal is to provide the world with efficient, durable, cost-effective, and best deep-UV UVC LED devices. It is believed that the launch of its latest long-life products will further promote market applications and promise to work closely with customers to provide comprehensive solutions. In March 2017, following the launch of 10,000 hours of 10mW UVC LED products and static water and mobile water sterilization modules based on HeaChips health chip technology last year, Qingdao Jiesheng Electric Co., Ltd. once again achieved technological breakthroughs and independently developed UVC of 100mW level. LED products. The product is small in size, but emits 100mW of 275nm deep ultraviolet light. This will bring unlimited imagination and application space for the design of large-flow flowing water and air sterilization solutions. According to reports, 200-280nm ultraviolet light can destroy the bacteria and virus DNA, thereby preventing its reproduction, achieving excellent bactericidal effect, and is now widely used in various sterilization and disinfection fields. UVC LED is small in size, long in life, high in sterilization efficiency, green and environmentally friendly, and does not contain any toxic substances. It is considered to be a revolutionary invention and an ideal ultraviolet light source. However, the current UVC LEDs on the market are relatively low UV output power, which greatly limits the application scenarios of UVC LEDs. According to reports, Qingdao Jiesheng Electric Company has realized the HeaChips technology of independent intellectual property rights through years of accumulation, covering all aspects from epitaxial wafer, chip, package to application design. The product line covers UVC (275nm) LED for sterilization and disinfection. UVB (308 nm) LED for dermatological treatment and UVA (365 nm) LED for industrial curing. Based on Jason Electric's HeaChips health chip technology innovation, Jason Electric achieved breakthroughs in epitaxial growth technology, chip technology and heat dissipation technology, successfully achieved 275nm UVC LED 100mW output optical power, greatly expanding the application space of UVC LED. In the future, the company will also introduce 1000mW or watt-level products for high-flow water and air sterilization.