About the luminous light-emitting basis

Luminous powder is common to us . So what luminous luminous basis of it, let's take a look .
1 , the light emitting luminous material is carried out according to the principle of photoluminescence , the excitation source is typically daylight and artificial light, it absorbs excitation light and stored , after the excitation light is stopped , then the decorative gravels in the form of slow- light slow release . absorbing light emitting → storage → → re-emitting , the process may be repeated indefinitely repeated , and the discharge cell phone battery charging → → → rechargeable discharge process was repeated using similar .
2 , the light-emitting material in the absence of external light source emits light in a dark environment , which is called the afterglow emission time period . Better performance of the long afterglow luminescent colors and diverse materials such as silicate system afterglow materials ,glow in the dark material activated afterglow characteristics of alkaline earth aluminate is the most superior, can achieve more than 20 hours afterglow - luminous .