What is the way OLED produces white light?

Solar Street Light Manufacturer shares that white light for lighting should have a good color rendering index (> 75) and a good color coordinate position (close to the point (0.33, 0.33) of the iga chromaticity map). There are two ways to generate white light from oleds.

(a) wavelength conversion. From OL will also affect the LED lighting goods standardized quality certification. About expert is in bear China economy to lead a newspaper reporter to say. The blue or ultraviolet light emitted by the ED is used to excite several phosphor materials, each of which emits different colors of light. The technology has been described as ordinary LED lights that cannot be used in dimming lamps, time-lapse switches and inductive switches. Avoid using in high temperature and high humidity environment, LED lights use the best between environmental temperature is 5 ~ 40 ℃. Phosphor down conversion.

(b) color mixing. In this method, multiple luminescent layers are used in a device, and the light of different colors emitted by different luminescent layers is mixed to produce white light. White light can be obtained by mixing two complementary colors (blue and orange) or three primary colors (red, green, and blue). A typical multi-layer structure is used to generate light of various colors. The main methods to get white light by mixing different colors are as follows:

(1) multi-layer structure containing red, green and blue luminous layers

(2) ForSTer/Dexter energy conversion

(3) microcavity structure

(4) white light is obtained through the vertical/horizontal laminated structure

(5) different luminescent materials are mixed or doped to form a mixing layer. Especially for the small lighting brands that just entered the market, the pressure of livelihood becomes increasingly heavy in this situation.

In color mixing technology, there is no use of phosphorescent materials, so the loss caused by wavelength conversion will not occur. This technology has the potential to achieve higher efficiency. At present, obtaining stable white light is still a research and development hotspot.

That's all for the sharing,and we supply Solar LED Street Light for sale, if you have any demand for our products,just feel free to contact us.