The local structure of rare-earth ions in solid host is of great research interest for designing new luminescence materials

and Eu

3+

ion is a good probe to reflect the local environment around rare-earth ions in different materials. In this paper

Eu

3+

-doped La

2

O

3

-3B

2

O

3

crystal and glass samples were prepared by solid-state reaction under different calcination temperatures. By controlling calcination temperatures at 960℃ and 1 200℃

respectively

the crystal and glass samples with the same composition were obtained. The Eu

3+

ions in the two samples present different flourescent properties. With the excitation of 394nm ultra-violet light

the glass sample presents an intense 618nm emission

while the crystal sample gives a dominant 696nm emission. The emission spectra

the phonon sideband spectra

the charge transfer bands and the lifetimes were measured to clarify the different luminescence of the two samples. In the emission spectra

both of the two figures (Fig.1

Fig.2) present the characteristic luminescence of Eu

3+

ion

including emission peaks at 590nm (

5

D

0

→

7

F

1

)

618nm (

5

D

0

→

7

F

2

)

650nm (

5

D

0

→

7

F

3

)

696nm (

5

D

0

→

7

F

4

). Among these transitions

the

5

D

0

→

7

F

1

transition is a magnetic dipole transition

and the

5

D

0

→

7

F

2

transition is an electric dipole transition. It was found that

with the transition from crystal phase to glass phase

the intensity ratio of

5

D

0

→

7

F

2

to

5

D

0

→

7

F

2

of Eu

3+

ion was enhanced

which indicates that the value of J-O parameter Ω

2

was increased. The local structures around Eu

3+

ion in the two different host were investigated by measuring the charge transfer bands and the phonon sideband spectra associated with the

5

D

2

←

7

F

0

transition. It was concluded that B-O vibrational mode inside the various borate rings and nonbridging B-O

-1

bonds stretching mode with phonon energy of 1 900

1 500cm

-1

respectively

exist in both of the two samples. The charge transfer bands confirmed that the near coordination ions of Eu

3+

are different in the two samples.