1. The effect of wafer on optical fading
From the results of the present experiment, the effect of the wafer's optical decay is divided into two categories: the first is the different material of the wafer causes the attenuation difference, the current commonly used Blu-ray wafer substrate material is sic and sapphire, the general structure of silicon carbide is designed as single electrode, its thermal conductivity is better, the sapphire is generally designed as a double electrode, the heat is difficult to export, the heat conduction effect is poor; the second is the size of the chip, in the wafer material phase, the size of different attenuation gap is also different.
2. Phosphor white LED light attenuation
There are many ways to achieve white light led, the most popular one is to apply a layer of yellow fluorescent powder on the Blu-ray Wafer, so that the blue and yellow light are blended into white, so the phosphor's material has great influence on the attenuation of the LED. The most mainstream fluorescent powder of the market is YAG yttrium aluminum garnet fluorescent powder, silicate fluorescent powder, nitride fluorescent powder, compared with Blu-ray LED chip has accelerated aging white led effect, and the different manufacturers of phosphors of the impact of light failure is not the same, which is closely related to the raw material components of phosphors. Lehman Photoelectric selection of the best material white fluorescent powder, make the white led compared to the same peers in the attenuation control has greatly improved.
With the application of white led in lighting, customer demand is constantly improving, we must continue to innovate, improve our product performance improvement of our process, as far as possible to meet customer demand.Shenzhen LightS Technology Co,.Ltd is trying to play its own advantages, and constantly strive to increase research and development, to develop more suitable for customer requirements for the National semiconductor lighting energy-saving industry to contribute.