The composition, function and classification of LED chips
1. The role of LED chip:
LED chips are the main raw materials of LEDs. LEDs mainly rely on chips to emit light.
Second, the composition of the LED chip is mainly composed of arsenic (AS) aluminum (AL) gallium (Ga) indium (IN) phosphorus (P) nitrogen (N) strontium (Si) several kinds of elements.
3. Classification of LED chips
1. According to the luminous brightness:
A. General brightness: R, H, G, Y, E, etc. B. High brightness: VG, VY, SR, etc. C. Super high brightness: UG, UY, UR, UYS, URF, UE, etc. D. Invisible light (infrared ): R, SIR, VIR, HIR
E. Infrared receiver tube: PT
F. Photocell: PD
2. According to the constituent elements:
A. Binary wafers (phosphorus, gallium): H, G, etc. B, ternary wafers (phosphorus, gallium, arsenic): SR, HR, UR, etc. C, quaternary wafers (phosphorus, aluminum, gallium, indium): SRF ﹑ HRF, URF, VY, HY, UY, UYS, UE, HE, UG
4. LED chip characteristics table
LED chip model luminous color component wavelength (nm) chip model luminous color component wavelength (nm)
SBI blue lnGaN / sic 430 HY super bright yellow AlGalnP 595
SBK brighter blue lnGaN / sic 468 SE highlight orange GaAsP / GaP 610
DBK brighter blue GaunN / Gan 470 HE super bright orange AlGalnP 620
SGL cyan lnGaN / sic 502 UE brightest orange AlGalnP 620
DGL is brighter turquoise LnGaN / GaN 505 URF brightest red AlGalnP 630
DGM is brighter turquoise lnGaN 523 E orange GaAsP / GaP635
PG Pure Green GaP 555 R Red GAaAsP 655
SG Standard Green GaP 560 SR Brighter Red GaA / AS 660
G green GaP 565 HR super bright red GaAlAs 660
VG brighter green GaP 565 UR brightest red GaAlAs 660
UG brightest green AIGalnP 574 H high red GaP 697
Y yellow GaAsP / GaP585 HIR infrared GaAlAs 850
VY brighter yellow GaAsP / GaP 585 SIR infrared GaAlAs 880
UYS brightest yellow AlGalnP 587 VIR infrared GaAlAs 940
UY brightest yellow AlGalnP 595 IR infrared GaAs 940
The obvious advantages of LED
LED (Light-EmiTTIng-Diode in Chinese means light-emitting diode) is a semiconductor that can convert electrical energy into visible light. It changes the principle of incandescent lamp tungsten filament light emission and energy-saving lamp three-color toner light emission, and uses electric field light emission. According to analysis, the characteristics of LED are very obvious, with long life, high light efficiency, no radiation and low power consumption. The LED spectrum is almost entirely concentrated in the visible light band, and its luminous efficiency can reach 80-90%. The reporter also compared the LED with ordinary incandescent lamps, spiral energy-saving lamps and T5 three-color fluorescent lamps. The results show that the general luminous efficacy of the incandescent lamp is 12lm / W, the life span is less than 2000 hours, and the luminous efficiency of the spiral energy-saving lamp is 60lm / W, lifespan is less than 8000 hours, T5 fluorescent lamp is 96lm / W, lifespan is about 10000 hours, and white LED with a diameter of 5mm is 20 ~ 28lm / W, lifespan can be more than 10000 hours. Some people also predict that the future upper limit of LED life will be infinite.
Most people think that energy-saving lamps can save energy by 4/5, which is a great initiative, but LEDs also save energy by 1/4 compared to energy-saving lamps. This is a greater reform of solid-state light sources. In addition, LED has other advantages, high light quality, basically no radiation, is a typical green lighting source; reliable and durable, extremely low maintenance costs and so on. Because LED has the above characteristics that other solid light sources can not match, LED will be the mainstream light source in the lighting industry in 10 years.
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