[Text|High-tech LED reporter Gan Qin] As one of the most competitive enterprises in the domestic LED phosphor market, Rare Earth is mainly engaged in research, development and production of rare earth and related materials, from rare earth mines to rare earth functional materials. The complete industrial chain. Its LED phosphors rank among the top in the domestic market, especially in the mid-to-high-end market, and the higher cost performance is recognized by downstream customers.
At the 2014 High-tech LED Exhibition, Rare Earth will bring high-efficiency, small-grain, high-stability Ga-containing green phosphors and high-color, high-efficiency nitride series red powder products.
"Phosphor is the key factor determining the color rendering performance of white LED light source. Without a good phosphor, there will be no high-color white LED light source." Liu Ronghui, director of the Rare Earth Luminescent Materials Division, said, "To improve the color rendering index, It is best to add red and green powder."
Liu Ronghui introduced that the Ga-YAG green phosphor brought by this time has the following advantages: the particle size of Ga-containing green powder is D50: 13~16μm±1; the accelerated aging (121°C, 2atm, humidity 100%, 48h) has no drift of color drift. The brightness is reduced by <1%, and the overall performance is close to the Lu-YAG green powder level.
In addition, the high stability nitride red powder has the following advantages: accelerated aging (121 ° C, 2 atm, humidity 100%, 48 h), color drift without drift, brightness attenuation <1%; color rendering index Ra > 80 (R9 > 10).
Ga-YAG green phosphor parameters:
Nitride red powder product parameters:
Liu Ronghui said that when the above two products are matched, the range of Ra of the packaged device is 80-90, and the R9 value can reach up to 90, and has the advantages of low powder consumption and high light efficiency, and solves the Lu-YAG green powder on the market. The price is high, and the narrowing of the nitride half-peak guarantees the light effect and sacrifices the commonality of color rendering (especially the lack of R9). “The two products are currently widely available on the market.â€
At the 2014 High-tech LED Exhibition, Rare Earth will bring high-efficiency, small-grain, high-stability Ga-containing green phosphors and high-color, high-efficiency nitride series red powder products.
"Phosphor is the key factor determining the color rendering performance of white LED light source. Without a good phosphor, there will be no high-color white LED light source." Liu Ronghui, director of the Rare Earth Luminescent Materials Division, said, "To improve the color rendering index, It is best to add red and green powder."
Liu Ronghui introduced that the Ga-YAG green phosphor brought by this time has the following advantages: the particle size of Ga-containing green powder is D50: 13~16μm±1; the accelerated aging (121°C, 2atm, humidity 100%, 48h) has no drift of color drift. The brightness is reduced by <1%, and the overall performance is close to the Lu-YAG green powder level.
In addition, the high stability nitride red powder has the following advantages: accelerated aging (121 ° C, 2 atm, humidity 100%, 48 h), color drift without drift, brightness attenuation <1%; color rendering index Ra > 80 (R9 > 10).
Research rare earth Ga-YAG green phosphor
Rare earth nitride red powder
Ga-YAG green phosphor parameters:
| product name | x | y | Peak wavelength (nm) | Half width (nm) | D50 (μm) |
| GaY-35H | 0.356 | 0.569 | 529 | 106 | 15.9 |
| GaY-37LM(x) | 0.370 | 0.565 | 533 | 108 | 13.5 |
| GaY-37LM | 0.373 | 0.565 | 533 | 108 | 13.5 |
| GaY-38L | 0.379 | 0.565 | 533 | 108 | 15.2 |
| GaY-38H | 0.386 | 0.565 | 534 | 108 | 15.6 |
Nitride red powder product parameters:
| product name | x | y | Peak wavelength (nm) | Half width (nm) | D50 (μm) |
| GPR-6401 | 0.644 | 0.355 | 630 | 89 | 12.5 |
| GPR-6402(x) | 0.642 | 0.357 | 628 | 86 | 12.5 |
| GPR-6403 | 0.641 | 0.358 | 625 | 85 | 12.5 |
| 0763PH | 0.6400 | 0.360 | 623 | 76 | 12.5 |
Liu Ronghui said that when the above two products are matched, the range of Ra of the packaged device is 80-90, and the R9 value can reach up to 90, and has the advantages of low powder consumption and high light efficiency, and solves the Lu-YAG green powder on the market. The price is high, and the narrowing of the nitride half-peak guarantees the light effect and sacrifices the commonality of color rendering (especially the lack of R9). “The two products are currently widely available on the market.â€
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