Phosphor for lighting

Lighting phosphors play a pivotal role in lighting. When 253.7nm ultraviolet rays are radiated to the phosphor coating on the inner wall of the lighting tube, some formed in the phosphors of the lighting. The 'luminous center' will absorb this energy during the ultraviolet radiation process. , Make the electrons in the ground state transition to a certain excited state energy level higher than the ground state, and then these electrons transition to a certain sub-high energy level, and radiate a photon at the same time. The wavelength of the photon is determined by the energy level difference of the transition process . Determined by the material of the phosphor luminescence center, most of these wavelengths are visible light. Because the vibration energy level of the luminescence center of the material is different when excited, and the energy level of the radiation termination is different, so even if the same is absorbed The luminescent center of the external light with wavelength will also radiate visible photons of different wavelengths, that is, the 253.7nm external light radiates to the fluorescent material to emit fluorescence spectra of different wavelengths. The energy of the radiant light (longer wavelength) of the lighting is more energy than the absorbed light ( Short-wavelength) energy is small, called Stokes (Stokes splashing). In this light-emitting process, the energy difference between the two is converted into heat. And it is lost in the phosphor coating. Therefore, the lighting is emitted The visible light consists of two parts: the first is the visible light emitted by ultraviolet radiation in the fluorescent coating, and the second is the visible light directly generated during the discharge process. The sum of the two is about 28% of the energy input into the fluorescent lamp. In addition, The light color of the lighting source is an important indicator to evaluate the quality of the light source. It is divided into two categories: comfort and color rendering, which are related to human long-term lighting habits. The lighting produced by our company uses pure three primary color rare earth phosphors. The mild color rendering is very good!