luminous paint afterglow luminescent properties

The electron trap level quantity, the long afterglow time ; absorb more energy , the electron is excited to overcome the trap level and energy gap between the energy levels (ET), and thus produce sustained luminescence . Photoluminescent pigment energy continues to increase it will make the afterglow time extension , if enough energy to the electron trap level all the time to return excited state level , is not conducive to the extension of time afterglow ; contrary, absorb very little energy , less so that the electron trap levels returned excited state level , but also long-lasting phenomenon was not observed . So long afterglow time depends on Phosphorescent Ceramic electrons in the trap level and the rate of return excited level , afterglow trap level depends on the intensity of the electron in the unit time to return excited level rate.