A novel green emitting long afterglow phosphor, Ca2SnO4:Er3+, was prepared.
An optimal doping concentration of Er3+ of 2% was determined.
After the UV source was turned off, the Ca2SnO4:Er3+ showed a typical triple-exponential afterglow decay behavior.
CIE chromaticity coordinates results confirmed a green light emitting of the Ca2SnO4:Er3+.
The persistent afterglow of the Ca2SnO4:Er3+ was attributed to suitable electron or hole traps.