Phosphor requirements for lighting applications
Release date: 2018-05-16 Source: Zhongzhao.com Share: 
Rare earth luminescent materials are one of the core materials for current illumination, display and information detectors, and are indispensable for the development of next-generation lighting and display technologies. in short:
1. Phosphors for illumination generally require a broad spectrum of spectra to improve the continuity of the spectrum of the illumination source.
2. The phosphor used for display is generally required to be a narrow spectrum to meet the high color purity RGB three colors required in high display light sources.
3. However, high efficiency, good stability, and weak mutual absorption between phosphors of various colors are common requirements in both the field of illumination and display.
Let's first take a look at the phosphor requirements for lighting applications.
About full spectrum illumination
In the field of lighting, with the accelerated penetration of white LEDs in the field of lighting, the market demand for quality of white LED light sources is also increasing, especially in indoor lighting, the focus of requirements for white LED light sources has been from the initial The pursuit of "high brightness" is simply converted into "high quality" that takes into account the color performance of color rendering index, color temperature, etc., and even pursues full-spectrum illumination similar to sunlight.
At present, the full spectrum LED implementation is mainly composed of blue chip technology (blue chip + multi-color emission phosphor) and ultraviolet / near ultraviolet chip (UV / near ultraviolet chip + multi-color emission phosphor) technology. However, the high color rendering illumination based on the blue chip is not a true full spectrum illumination, and the spectral "gutter" between blue and green light cannot be completely solved, and it is theoretically difficult to achieve the full spectrum requirement. The development of the violet chip technology has laid an important foundation for the full-spectrum illumination of multi-color phosphors excited by violet chips.
At present, the blue-excited phosphor technology has become more mature, but most of these phosphors cannot be excited by violet light. At present, ultraviolet/near-ultraviolet chip excitation is more studied with green, yellow and red phosphors. However, the common problem is The luminous efficiency is low and it is difficult to meet practical applications. The development of phosphors suitable for high-efficiency excitation of violet light, broad-band emission and low mutual absorption between phosphors has become the focus of research in the industry. It is also an important force for China to achieve intellectual property breakthroughs in the field of lighting in the future. Has a patent layout and material development basis. Moreover, the research rare earth is also one of the earliest units in the country to introduce high-performance red and green phosphors for high color rendering. At present, high-color illumination sources with Ra greater than 97 can be achieved.
About laser lighting
In addition, as an important development direction of future lighting, laser lighting has received more and more attention in recent years, and has been the first to be applied in automotive headlight lighting systems, which can obtain much higher than Xenon headlights or LED lights. Brightness and lower energy consumption. The development of new rare earth fluorescent materials with high stability and high conversion efficiency and their application technology will be a major challenge for laser illumination in the future, which will lead to the industrialization demand for new rare earth fluorescent materials and their ceramics and crystals.
About plant lighting
As an indispensable physical environment factor for plant growth and development, the light environment can be used as a global focus by regulating light quality, controlling plant morphology, promoting plant growth, reducing the time spent on plant flowering, and increasing plant yield and productivity. At present, the research of blue and deep red phosphors has been extensive, and the current technology is relatively mature and can be applied to plant illumination. However, the research on non-visible light used in plant phytochrome is still rare, and its luminous efficiency is still relatively high. Low level.
More lighting information is available at https:// .
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