Much attention has been paid to search for high-efficient phosphor since the plasma display panels (PDP) edged competitively in the market of large flat panel display. The commercial PDP blue phosphor BaMgAl

10

O

17

:Eu

2+

suffers from decreasing performance of brightness and color because of the serious processing thermal degradation and timing deterioration. New blue phosphor with stable activation ion may be a better way to solve this problem. In the lanthanide series

Tm

3+

may be a feasible candidate for the blue emissions originating from

1

D

2

3

H

4

(around 450nm)

1

G

4

3

H

6

(around 480nm) transitions. Conventionally

the phosphor production is prepared using solid-state reactions between oxide sources at high temperature. However

it is difficult to control over particles size and morphology

uniform dopant concentration. On the contrary to conventional methods

aerosol synthesis technique has been employed successfully to prepared phosphor particles with good morphology in recent years. By coprecipitation reaction

high quality Y(P

V)O

4

:Tm

3+

phosphor was prepared. The phosphor was characterized by XRD

SEM

and photoluminescence under VUV (147nm) or UV (254nm) excitation. The XRD patterns disclosed that the obtained Y(P

V)O

4

:Tm

3+

is not a mixture

but a compound. The SEM image showed that the size of the phosphor particles is uniform and submicron

and the morphology is regular and no agglomeration. Under VUV and UV excitation

there are two emission peaks for most phosphors observed

the narrow one at 475nm originates from the Tm

3+

ion transition

1

G

4

3

H

6

and the weak broad-band around 430nm belongs to VO

4

3-

group. With increasing Tm

3+

concentration

the narrow peak intensity enhanced while the Tm

3+

concentration is lower than 0.005 in mole. When the Tm

3+

concentration is higher than 0.005

the intensity of the transition

1

G

4

3

H

6

decreases with increasing Tm

3+

concentration. The intensity of broad-band de-creases with Tm

3+

concentration in full studied concentration region. It is expected that Y(P

V)O

4

:Tm

3+

would be a promising candidate for PDP phosphors.