Four Major UV LED Chips-Quickly Understand The UV market

As a manufacturer of UV LED chips, our company will continue to develop products, concentrate its efforts, and be a "hero behind the scenes".

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Chapter 1  Four Major UV LED Chips

Chapter 2 UV LED Chip Structure Selection

Chapter 3 The Feature of UV LED

With the “Minamata Treaty” gradually approaching the elimination of mercury pollution and the raging global epidemic this year, UV LED chips has received unprecedented attention. 

At present, the list of UV LED chip applications continues to grow, and it has broad market prospects in many fields such as industrial curing, air purification, health lighting, sterilization, medical and health, biological detection, and security communications.

Compared with the current traditional UV light source mercury lamp, UV LED does not have the environmental problem of mercury pollution. Therefore, it is more in line with the current industrial development trend of green environmental protection, and it also has the advantages of small size, lightweight, low voltage and low consumption, and easy adjustment. 

According to LEDinside survey data, from 2018 to 2023, the compound annual growth rate of the global UV LED market scale is as high as 27%.

The application of UVA UVB UVC

As a company specializing in the research and development, manufacturing, and sales of high-end LED epitaxial chips, our company’s products cover high-performance RGB display chips, UV chips, flip-chip high-power chips, and Mini/Microchips, etc. At present, our company’s UV LED series products mainly include special chips for industrial curing, nail art, mosquito trapping, photocatalyst air purification, sterilization, and other fields. All those chip products and technologies that are “invisible” to the human eye have been highly recognized by the market and have achieved rapid growth since the beginning of this year.

1.The Series of Industrial Curing UV LED Chip





















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The Series of Industrial Curing UV Chip

In 2020, the United Nations “Minamata Treaty” officially entered into force. The most important one of the convention is that starting from 2020, the production, import, and export of mercury-containing products will be banned globally, which means that the mercury lamp curing market will be replaced by LEDs. The current commercial curing wavelengths mainly include 365nm, 395nm, and 405nm. For most ink applications, 395nm is the preferred wavelength, and in adhesives, 365nm or 405nm is usually the first choice.

Therefore, for the curing application market, we have developed two series of near-ultraviolet UV LED chips of 365nm and 395nm.

In the development of 395nm series LED chips, on the one hand, through the research and development of the key technologies such as the quality of the underlying crystal, superlattice structure, and quantum wells in the violet light band obtained an epitaxial layer structure with high light extraction efficiency. On the other hand, a special reflection and light-emitting structure are designed for the special light-emitting band of violet light, and the special chip structure for violet light is designed in combination with the characteristics of the current injection of violet light products. The brightness of near-violet light-curing series products has reached the domestic first-class level, and two series of application products of 0.2W (1113, 1020) and 0.5W (1030) have been developed.

In terms of 365nm chip development, based on the breakthrough in AlN buffer substrate stripping technology, vertical 2020 and vertical 1515 series chips have been launched. By means of substrate transfer, the absorption effect of GaN material and sapphire on the ultraviolet band is reduced, thereby greatly enhancing the external quantum efficiency of the chip. In order to meet the needs of different customers, different curing matching solutions such as formal 365nm + formal 395nm and vertical 365nm + formal 395nm have been introduced to provide customers with different options.

The Series of Industrial Curing UV Chip and application

2.The Series of Photocatalyst UV Chip

What is Photocatalyst Technology

Nanomaterials convert light energy into chemical energy under the irradiation of light. Then the process of promoting the synthesis of organic matter or degrading organic matter is photocatalyst technology.

This process is also called photocatalysis, so photocatalyst technology is also called photocatalysis technology.

Under the irradiation of light, the electrons in the valence band of the nano-photocatalyst are excited to the conduction band, forming electrons and holes, which interact with O2 and H2O adsorbed on its surface to generate superoxide anion radicals, O2- and hydroxyl radicals -OH, its free radicals have strong oxidative decomposition ability, can destroy C-C bonds, C-H bonds, C-N bonds, C-O bonds, O-H bonds, N-H bonds in organic matter, and decompose organic matter into carbon dioxide and water; Proteins change the living environment of bacteria and viruses to kill bacteria and viruses.


Size (mil)

Current (mA)







With the continuous fermentation of the epidemic, people are paying more and more attention to the sterilization and purification of the surrounding environment and air. At present, the common air purifiers on the market basically use activated carbon filter elements or HEPA filters, which can only simply filter large particles of dust in the air but cannot remove odors and viruses in the air.

To this end, a high-power 4545 photocatalyst LED chip has been developed. This series of chips has the advantages of high current injection efficiency, good wavelength concentration, good reliability, and strong anti-static ability. In the application of UV photocatalyst air purifiers, it can pass ultraviolet Light irradiation catalyzes water molecules in the air to generate active ions and react with organic compounds, completely killing bacteria and viruses in the air and fully protecting the health of users.

Compared with the traditional air purification system, the UV photocatalyst air purification system has the characteristics of persistence, broad-spectrum, and no drug resistance, and also has the characteristics of non-toxic, odorless, and pollution-free, and has a wide range of application prospects.

Principle of photocatalyst purification and sterilization

3.The Series of Healthy Lighting UV Chip





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The Series of Healthy Lighting UV Chip

The Series of Healthy Lighting UV In recent years, the incidence of myopia in children and adolescents has been increasing year by year. According to the results of the National Children and Adolescent Myopia Survey in 2018, the myopia rate of primary school students in our country is 36.0%, junior high school students 71.6%, and high school students 81.0%. Myopia has become a serious threat to China and one of the problems of social public health in the world.

An important factor affecting the visual health of young people is the unqualified classroom lighting environment. Problems such as illuminance and its uniformity, CRI, stroboscopic, and glare are common. And household lamps are only based on “brightness” and there is no light quality at all. Teenagers have been in a bad lighting environment for a long time, which is the cause of myopia. one of the main reasons.

The 405-415nm short-band purple light chip is used to excite the RGB mixed phosphor which to realize the full spectrum, which has the advantages of good spectral continuity, low blue light radiation power, and high similarity to the solar spectrum, and high CRI. It is the first choice for healthy lighting solutions, the most critical of which is the development of healthy lighting violet chips with high light extraction efficiency.

For full-spectrum health lighting applications, through the special epitaxial layer structure design, the internal resistance of the chip can be minimized, the droop effect can be reduced, and the light extraction efficiency can be improved. At the same time, according to the characteristics of full-spectrum phosphors, a healthy lighting epitaxial structure with high color purity and high consistency is designed and developed. With the further improvement of chip light extraction efficiency and current injection efficiency, three high-efficiency healthy lighting LED chip products are formed, 1030, 1735, and 2235. Provide customers with different options in high light quality application fields such as classroom lighting, eye protection table lamps, and supermarket lighting.

4.The Series of Sterilization and Disinfection UV Chip


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By insisting on independent innovation, three series of UVA near-ultraviolet 365nm, 395nm, and 410nm products have been formed, and the development of deep ultraviolet UVB and UVC epitaxial chips for sterilization and disinfection applications has begun. Shortly, a series of UVC chips such as 10202020 will be launched.

The UV LED chip structure has different technical routes such as formal, vertical, and flip-chip. The three chip structures have their own advantages. Based on factors such as light extraction efficiency and cost, different chip structures will be selected under different conditions. So what are the advantages and disadvantages of the three structures of UV LED chips?

UV LED Chip Structure Selection

UV LED is an electroluminescent diode. Compared with the traditional UV mercury lamp, it is more environmentally friendly, efficient, and has low energy consumption. It is a green industrial technology that is truly oriented to sustainable development.

1.Face-up chip structure

Need to control costs

Dressing process has matured

Sacrificing product performance for price

2.Vertical chip structure

Flip-chip to GaN layer absorbs light

Lift off GaN layers with vertical structures

Good heat dissipation and light output

3.Flip-chip structure

The difficulty of vertical structures lies in substrate lift-off

The high aluminum component AIN grows on the sapphire, and the laser lift-off damages the epitaxial layer greatly.

UVA LED chip – vertical chip structure

UVB LED chip – flip-chip structure

The Features of UV LED

Single wavelength, high luminous efficiency, low energy consumption.

UV LED can directly convert electrical energy into UV light, and it emits single-band ultraviolet light. The light energy is highly concentrated in a specific ultraviolet light band. Now the mature applications in the market are UV LED chip 356nm, 385nm, 395nm, and 405nm. However, the emission spectrum of the traditional UV mercury lamp is very wide, and the ultraviolet spectrum that really plays an effective curing role only accounts for a part of it. At the same time, the photoelectric conversion efficiency is low and the energy consumption is large.

Does not generate infrared rays and ozone

Traditional mercury lamps generate infrared rays and emit a lot of heat, which can easily damage heat-sensitive substrates. The UV LED is a cold light source, which can effectively avoid the shrinkage and deformation of the substrate due to overheating, and has wider adaptability to the material. At the same time, UV LEDs used for UV curing are usually UV light with a longer wavelength, so no ozone is generated during the curing process, and a good working environment can be maintained. Compared with traditional mercury lamps, it is safer and more environmentally friendly.

Electronic control

UV LEDs do not need to preheat like mercury lamps, nor do they need to be constantly on to maintain lamp life and work efficiency. The UV LED can turn on (off) the light instantly, and the output energy can also be freely set and can adjust according to the speed of the machine automatically, which is very energy-saving and easy to control.

Long service life and low maintenance costs

The service life of UV LED lamps can reach more than 10,000-50,000 hours, which is more than 10 times that of traditional mercury lamps. And the light decay is very slow, and the service life is not affected by the number of switches. At the same time, the LED light source has no mercury and no accessories such as a lampshade, so almost no maintenance is required, which reduces the maintenance cost.

High flexibility of use and small system size

LED light sources can be divided into point light sources, line light sources, and surface light sources, and the effective irradiation area can be customized. The light source equipment is small in size, and the irradiation device and related supporting devices are very compact, eliminating the need for large mechanical installation space and pipeline construction in the past. This feature makes it adaptable to various production processes and the production process is more efficient.

Under COVID-19, the importance of human health has once again increased. As a manufacturer of core chips for UV LED products, the company will continue to develop products, concentrate its efforts, be a “hero behind the scenes”, become the “invisible wings” of the UV LED chip market, and work with downstream enterprises to contribute to the century-old plan for human health.

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