supported by the National Natural Science Young Foundation of China(51202099);the Gansu Provincial Department of Finance Project(BH2012-017);the Gansu Province University Research Foundation(2013B-059)
A novel phosphor of un-doped Sr Zr Si2O7 material with blue long lasting phosphorescence which could be recorded for about 5400 s(0.32 mcd/m^2) was developed. It revealed that both the emission centers and traps lev...