What's the reason for the darkening of LED power phosphors?
Because of the large diffusion, the powder may not be pure silica, the true silica chemical properties are relatively stable, chemical reactions will not occur, and good products must be matched with materials before they can be made.
Problems caused by the diffusion of powder! I also found this phenomenon in the experiment, and the use of this kind of diffusion powder did not happen in the back
It may be related to mixing powder, glue and phosphor, as well as current and temperature. Can only provide you with the direction of analysis. First determine whether the phosphor and glue are problems, and then determine whether the heat is a problem.
