What is the role of phosphor in cob led

The specific phosphor types used in COB LEDs can vary by manufacturer and application. Some commonly used phosphors in COB LEDs include yttrium aluminum garnet (YAG), cerium-doped yttrium aluminum garnet (Ce:YAG), and silicate-based phosphors.

YAG-based phosphors are widely used in white COB LEDs because they provide high luminous efficiency and stability under a wide range of operating conditions. Ce:YAG-based phosphors are more efficient and produce warmer white light, making them popular for indoor lighting applications.

Silicate-based phosphors, such as those based on europium-doped strontium silicate, are also used in COB LEDs to produce high brightness and high efficiency in specific colors such as green or blue.

In summary, the phosphors used in COB LEDs depend on the desired color temperature and specific application requirements.

There are several phosphor brands commonly used in COB (Chip-on-Board) LEDs, including:

Intematix: Intematix is a leading manufacturer of LED phosphors widely used in COB LEDs.

Dow: Dow is another major manufacturer of phosphors for LED applications, and their phosphors are also used in many COB LEDs.

Nichia: Nichia is a well-known LED manufacturer, and they also produce their own phosphors, which are used in their COB LEDs.

Lumileds: Lumileds is a company that specializes in LED lighting solutions, and they use their own proprietary phosphors in COB LEDs.

Samsung: Samsung is a major player in the LED lighting industry and they produce their own phosphors for their COB LEDs.

These are just a few of the many phosphor brands used in COB LEDs. The specific phosphor brand used will depend on the manufacturer and the specific application of the COB LED.

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