The effect of preparation conditions such as sintering temperature on the luminescence properties of SrTiO

3

:Pr

3+

phosphors doped by compensation ions with various valences were studied to obtain best luminescence property. The doping ions with various valences were selected to verify the charge compensation effect on the luminescence intensity as K and Al seem to have similar charge compensation effect. PL spectra were measured to analyze the effect of preparation parameters

such as doping ions of K

Ca

Al and sintering (temperature

) on the luminescence properties of SrTiO

3

:Pr

3+

phosphors. And XRD measurements were carried out to verify the crystal structure of prepared SrTiO

3

:Pr

3+

phosphors. The results revealed that all samples emit red light at 610 nm originating from

1

D

2

3

H

4

transition of Pr

3+

(ions.) The luminescence intensity varies with sintering temperature

while the samples sintered at 1 150℃ have the best luminescence intensity. Among K

Ca and Al doped samples

only the Al-doped samples have the (obvious) enhanced luminescence intensity

the strongest luminescence intensity was about 10 times as that of pure SrTiO

3

:Pr

3+

phosphor without compensation doping. On the other hand

phosphor doped with K ions

which likely has similar charge compensation effect as that doped with Al ions

has little effect on the improvement of luminescence intensity. Contrary

it has similar intensity as that of either pure SrTiO

3

:Pr

3+

phosphors or Ca-doped phosphors which are believed to have not such charge compensation effect. Above result about the effect of various ions doping on luminescence properties could be explained by combination of charge compensation effect and substitution structure effect. The charge compensation effect is effective only when the doping ions Al

3+

is substitute for the Ti ions which is the nearest neighbor ion to the (luminescence) ions of Pr

+

Sr

. Present study shows an optimal preparation condition and proposes a method to choose effective charge compensation ion for SrTiO

3

:Pr

3+

phosphors with best luminescence intensity.