YBO 3 :Eu 3+ x X ì Ät ] k ù° Ë Ñ= k8 ý ] k ù° Ë Ñ ¤V R Ë
T
) ç ¬ £ ∗
@ / < Æ § F « Ñ/ B N < Æõ , Â Òí ß 617-736 (2008¸ 12 Z 4 4{ 9 ~ Ã Î6 £ §)
Y
1−xBO
3:Eu
3+xì r ´ ú + þ AF g ^ \ ¦ è : r ¸\ ¦ 1000, 1100, Õ ªo ¦ 1200
◦C Ð or v ¦ Eu s : r < Ê Ä
»| ¾ Ó` ¦ or v 9 ¦ © ì ø Í6 £ xZ O (solid state reaction)` ¦ s 6 x # ] j ¸ % i . è : r ¸_ oü <
Eu
3+_ < Ê| ¾ Ó\ É r & ñ $ í , ³ ð + þ A © x 9 + þ AF g: £ ¤$ í ` ¦ ì r$ 3 % i . X- r] X z ´+ « >\ _ è : r
¸ 7 £ x ½ + ÉÃ º2 ¤ ì r ´ ú _ & ñ $ í s ¾ Ó © ÷ &% 3 Ü ¼ 9, Y
1−xBO
3:Eu
3+xì r ´ ú s (100) x 9 (102) ~ ½ Ó ¾ Ó_ Å Ò
& ñ ` ¦ t 9, (002), (110), Õ ªo ¦ (104) x ß ¼\ ¦ t H & ñ © Ü ¼ Ð $ í © % i 6 £ §` ¦ S X ½ + É Ã º e
% 3 . Å Ò & ³p â ` ¦ s 6 x ô Ç { 9 _ p [ j½ ¨ ¸ 8 £ ¤& ñ ` ¦ : x # è : r ¸ 7 £ x ½ + ÉÃ º2 ¤ { 9 _ ß ¼ l
& t ¦ ç H{ 9 > H d` ¦ S X % i . è : r ¸_ 7 £ x \ É r + þ AF g y © ¸_ 7 £ x H ì r ´ ú { 9 _
&
ñ $ í x 9 { 9 + þ AI _ ç H{ 9 $ í _ ¾ Ó © \ _ ô Ç כ e ` ¦ · ú Ã º e % 3 . Y
1−xBO
3:Eu
3+xì r ´ ú _ + þ AF g Û ¼& 7 à
Ô! 3 É r Eu
3+_ < Ê| ¾ Ós 0.15 mol\ " f © a % ~ É r : £ ¤$ í ` ¦ f ` ¦ · ú Ã º e % 3 Ü ¼ 9, 0.20 mol Ð 7 £ x ½ + É M : 0
l
x ¸ èY > & ³ © s µ 1 ÏÒ q t < Ê` ¦ · ú Ã º e % 3 .
PACS numbers: 78.55.-m, 78.20.-e
Keywords: YBO
3:Eu
3+, & h Ò o + þ AF g ^ , Photoluminescence
I. " e  ] Ø
þ
j H \ Ð Z } É r ´ òÖ ¦ _ n Û ¼e ¦ Y Us \ ¦ > hµ 1 Ï l 0 Aô Ç
½ ¨ ' × æ X < plasma display panel (PDP) ì r
\
¦ q 2 © # , f t H PDP ë ß p u © 6 x o÷ &t H 3 l wÙ þ ¡ t
ë ß # Q t © & h ` ¦ כ Ü ¼ Ð ¨ î ÷ & H electro- luminescence display (ELD) x 9 field emission display (FED), light emitting diode (LED) 1 p x s e . FEDü <
PDP ° ú É r @ /³ ð& h ¨ î ó ø Í n Û ¼e ¦ Y Us è \ H Á º% Á Ð
Z } É r ´ òÖ ¦` ¦ ° ú H + þ AF gÓ ü t| 9 [ þ t _ > hµ 1 Ïs כ ¹½ ¨ ) a [1–
5]. s Qô Ç ¦´ òÖ ¦ _ + þ AF g ^ > hµ 1 Ï` ¦ 0 AK Ð $ + þ AF g
^
_ µ 1 Ï F g B j& m 7 £ §` ¦ µ 1 ßy H כ s B Ä º × æ כ ¹ . + þ AF g
^
_ + þ AF g ´ òÖ ¦ \ % ò ¾ Ó` ¦ p u H & ñ $ í s ³ ð + þ A © õ
° ú É r à º[ þ t _ o\ ¦ u < ÊÜ ¼ Ð + þ AF g ^ _ 6 f ¸ ¾ Ó ©
\
@ /ô Ç ½ ¨\ ¦ e . ¢ ¸ô Ç + þ AF g ^ \ ¦ s À Ò H y $ í ì r _ F
g < Æ& h % i ½ + É` ¦ µ 1 ß) " f, Õ ª % i ½ + É_ F G @ / o\ ¦ : x K 6 f ¸\ ¦ 7
£
x r v H ½ ¨ ¸ Ö ¸ µ 1 Ïy ' ÷ &# Q M ® o [6].
þ
j H \ B ÐÀ Ó s : r s ' ) a orthoborate (REBO 3 ) _ ]
j ¸ü < + þ AF g : £ ¤$ í \ @ /ô Ç ½ ¨[ þ t s e ¦ Ý ¼ n Û ¼e ¦ Y Us J
V , 6 x _ (plasma display panel: PDP) / B N ü @ + þ AF g
^
Ð_ 6 £ x6 x` ¦ 0 A # Ö ¸ µ 1 Ïy ' ÷ &# Q M ® o [7–9]. PDP
∗
E-mail: ssyi@silla.ac.kr
6
x _ + þ AF g ^ Ð s 6 x l 0 AK " f H + þ AF g ´ òÖ ¦ _ ¾ Ó © ÷ r ë ß
m Ò o_ í H ¸\ ¦ ¾ Ó © r v H כ ¸ × æ כ ¹ô ÇX < s \ ¦ 0 A K
B ÐÀ Ó s : r s ' ) a orthoborate ¸ { 9 [ þ t \ @ / ô
Ç ½ ¨ õ [ þ t ¸ µ 1 ϳ ð ) a e [10]. : r ½ ¨\ " f H YBO 3 \ ¦ ¸^ (host) Ð # Eu 3+ \ ¦ Ö ¸$ í ^ (activator) Ð '
# & h Ò o + þ AF g ^ Ð 6 x l 0 A # Eu 3+ _ < Ê| ¾ Ó
\
ì r ´ ú ` ¦ ] j ¸ % i Ü ¼ 9, ì r ´ ú _ & ñ ½ ¨ ¸, ³ ð
½
¨ ¸ Õ ªo ¦ + þ AF g Û ¼& 7 à Ô! 3 ` ¦ 8 £ ¤& ñ ¦ ì r ´ ú _ & ñ $ í x 9
³ ð + þ A © õ + þ AF g ´ òÖ ¦ õ _ ' a > \ @ / # ½ ¨ % i
.
II. ÷ m Ç ] M ö
Y 1−x BO 3 :Eu 3+ x ì r ´ ú r « Ñ H Eu 3+ _ < Ê| ¾ Ó` ¦ 0.05, 0.1, 0.15, Õ ªo ¦ 0.20 mol Ð or v 9, Y 2 O 3 (99.99 %,Aldrich), H 3 BO 3 (99.9 %,Aldrich), Õ ªo ¦ Eu 2 O 3 (99.99 %,Aldrich) _ o < Æ& h | ¾ ÓÜ ¼ ÐÂ Ò' ï r q ÷ &% 3
. Y 1−x BO 3 :Eu 3+ x ì r ´ ú _ ] j ¸ H Ä º 1 ball mill` ¦
l 0 A # e ¦ Û ¼h Ë : ÐÖ ¦(Bowl) \ ï r q ô Ç r « Ñü < ZrO
^
¦` ¦ ° ú s V , # Q 460 rpmÜ ¼ Ð 20 r ç ß ball mill` ¦ ô Ç Ê ê
D ¥ ½ + Ëô Ç ì r ´ ú _ ^ ¦` ¦ Q? /# Q | ¸ % i . | ¸ ) a r « Ñ
\
¦ [ j b ¸m \ V , ¦ l Ð\ " f 3 ◦ C/min _ q Ö ¦
Ð 600 ◦ C t ` ¦ 2 ; 6 £ § 4 r ç ß 1 l x î ß è (calcining)/ B N
-73-
Fig. 1. XRD patterns of Y 0.85 BO 3 :Eu 3+ 0.15 phosphors syn- thesized at different temperatures (a) 1000 ◦ C, (b) 1100
◦ C, and (c) 1200 ◦ C.
&
ñ ` ¦ 2 ; Ê ê 2 ball mill` ¦ % i . 2 ball mills = å Q è
ß ì r ´ ú ` ¦ l Ð\ V , ¦ 1000, 1100 x 9 1200 ◦ C \ " f 4r ç
ß 1 l x î ß è % i .
Y 1−x BO 3 :Eu 3+ x ì r ´ ú _ & ñ ½ ¨ ¸ü < & ñ $ í ` ¦ ¸ l
0 AK X- r] X (XRD, X-ray diffraction)` ¦ 8 £ ¤& ñ % i Ü
¼ 9, X- _ í ß ê ø Íy (2θ É r 15 ◦ ∼ 70 ◦ % ò % i \ " f ì r { © 2 ◦ _ Û
¼ ± p 5 Å q ¸ Ð 8 £ ¤& ñ % i . ³ ð p [ j½ ¨ ¸ H Å Ò & ³p
â
(scanning electron microscope : SEM)` ¦ s 6 x # 8 £ ¤
&
ñ % i Ü ¼ 9, + þ AF g Û ¼& 7 à Ô! 3 É r Xenon Ï þ á Ô\ ¦ F g " é ¶ Ü ¼ Ð
H + þ AF g F g ¸> (Perkin-Elmer, LS50B)\ ¦ 6 x # 235 nm _ © Ü ¼ Ð # l r & z ´ : r \ " f 8 £ ¤& ñ % i .
III. ÷ m Ç] M ö+ s ÇÊ Ý õ m Í w ² o
Fig. 1 \ " f H ¦ © ì ø Í6 £ xZ O Ü ¼ Ð ½ + Ë$ í ô Ç Y 0.85 BO 3 :Eu 3+ 0.15 + þ
AF g ^ ì r ´ ú _ è : r ¸\ É r X- r] X © ` ¦ YBO 3 _ JCPDS(35-0591) õ ü < q § # ] jr % i . è
: r ¸ 7 £ x ½ + ÉÃ º2 ¤ ì r ´ ú _ & ñ $ í s ¾ Ó © ÷ &% 3 Ü ¼ 9, Y 1−x BO 3 :Eu 3+ x ì r ´ ú s (100) x 9 (102) ~ ½ Ó ¾ Ó_ Å Ò & ñ
` ¦ t 9, (002), (110), Õ ªo ¦ (104) x ß ¼\ ¦ t H
& ñ © Ü ¼ Ð $ í © % i 6 £ §` ¦ S X ½ + É Ã º e % 3 .
Fig. 2 H è : r ¸\ É r Y 0.85 BO 3 :Eu 3+ 0.15 ì r ´ ú [ þ t _ SEM s . è : r ¸ 1000 ◦ C \ " f 1200 ◦ C Ð 7 £ x
< Ê\ { 9 _ ß ¼l 7 £ x % i Ü ¼ 9, { 9 _ ß ¼l
¢
¸ô Ç ç H{ 9 K f ` ¦ · ú Ã º e . 7 £ ¤ è : r ¸ 7 £ x < Ê\
Y 0.85 BO 3 :Eu 3+ 0.15 + þ AF g ^ ì r ´ ú _ { 9 [ þ t _ ì ø Í6 £ x s Ö ¸ µ
1 Ï > { 9 # Qz ¤6 £ §` ¦ \ V © K ^ ¦ Ã º e .
Fig. 3(a) H É r : r ¸\ " f è ) a Y 0.85 BO 3 :Eu 3+ 0.15 + þ
AF g ^ ì r ´ ú [ þ t \ @ /K 611 nm _ + þ AF g \ @ /ô Ç # l + þ
AF g Û ¼& 7 à Ô! 3 ` ¦ · p כ s . è : r ¸\ ' a > \ O s
200 nm\ " f 260 nm_ V , É r % ò % i \ 5 g ¸^
Fig. 2. SEM images of Y 1−x BO 3 :Eu 3+ x phosphors syn- thesized at different temperatures (a) 1000 ◦ C, (b) 1100
◦ C, and (c) 1200 ◦ C.
&
ñ \ _ ô Ç # l Û ¼& 7 à Ô! 3 s > r F < Ê` ¦ · ú Ã º e . è
: r ¸ 7 £ x ½ + ÉÃ º2 ¤ # l Û ¼& 7 à Ô! 3 x ß ¼° ú כs 7 £ x % i Ü
¼ 9, s H & ñ $ í _ ¾ Ó © Ü ¼ Ð ô Ç { 9 _ ß ¼l 7 £ x
\
É r ³ ð & h _ 7 £ x \ l H כ Ü ¼ Ð ^ ¦ Ã º e .
Fig. 3(b) H Y 0.85 BO 3 :Eu 3+ 0.15 + þ AF g ^ ì r ´ ú [ þ t` ¦ 235 nm _
#
l © Ü ¼ Ð # l r & % 3 É r + þ AF g Û ¼& 7 à Ô! 3 õ s .
Y 0.85 BO 3 :Eu 3+ 0.15 + þ AF g ^ ì r ´ ú [ þ t _ + þ AF g Û ¼& 7 à Ô! 3 É r è
: r ¸\ ' a > \ O s Eu 3+ _ 5 D 0 → 7 F 1 ü < 5 D 0 → 7 F 2 s
\ _ ô Ç + þ AF g x ß ¼[ þ t s 593 x 9 611 nm % ò % i \ " f y y
z ¤Ü ¼ 9 [10,11], è : r ¸ 1000 ◦ C \ " f H ± ú É r + þ AF g
´
òÖ ¦ s z ¤Ü ¼ , : r ¸ 7 £ x ½ + Éà º2 ¤ % ò % i _ ©
\
5 g" f + þ AF g [ jl 7 £ x < Ê` ¦ · ú Ã º e % 3 . s Qô Ç s
Ä » H + þ AF g _ ´ òÖ ¦` ¦ & ñ H × æ כ ¹ô Ç כ ¹ Ü ¼ Ð ì r ´ ú _
& ñ $ í x 9 ³ ð + þ A © ` ¦ [ þ t à º e H X <, è : r ¸ 7 £ x
½ + ÉÃ º2 ¤ { 9 _ & ñ $ í s ¾ Ó © | ¨ c ÷ r ë ß m o < Æ& h
½
¨$ í , { 9 ß ¼l ü < C \ P Õ ªo ¦ { 9 ¸ ª s þ j& h o ÷ & H s
Ä » Ð K $ 3 ½ + É Ã º e [12]. " f è : r ¸ 1200 ◦ C s
© \ " f H ç H{ 9 9 ß ¼l H { 9 _ + þ AI H X
<, Õ ª â Ä º\ 8 Z } É r { 9 Ø æ x 9 ¸\ ¦ t 9 ³ ð
\
" f_ í ß ê ø Í ¢ ¸ô Ç y è H d Ü ¼ Ð + þ AF g ´ òÖ ¦ s 7 £ x > ) a
[13]. Õ ª QÙ ¼ Ð { 9 s _ â > x 9 ¸ ± ú t H X <, { 9
â > H \ ¦ í S \ ¦ Ò q t$ í ) a y n C` ¦ í ß ê ø Ír ( Ü ¼ Ð +
+ þ AF g Û ¼& 7 à Ô! 3 _ µ 1 ßl \ ¦ y èr v H " é ¶ s | ¨ c à º e l
M :ë H \ { 9 â > \ ¦ > ° ú H ì r ´ ú { 9 à º2 ¤ Ä ºÃ ºô Ç + þ A F
g : £ ¤$ í ` ¦ · p H כ ` ¦ · ú Ã º e .
Fig. 4(a) H Eu 3+ _ < Ê| ¾ Ó (0.05, 0.1, 0.15, Õ ªo ¦ 0.20 mol) \ É r 1200 ◦ C \ " f è ô Ç Y 1−x BO 3 :Eu 3+ x ì r ´ ú _
r] X © ` ¦ YBO 3 ì r ´ ú _ JCPDS (16-0277) õ ü < q § ô
Ç XRD õ s . Eu 3+ _ < Ê| ¾ Ó\ ' a > \ O s ¸ H ì r ´ ú [ þ t
É r JCPDS \ ] jr ) a r] X © õ ¸ ú { 9 u % i Ü ¼ 9, (102), (110), Õ ªo ¦ (104) x ß ¼\ ¦ t H & ñ © Ü ¼ Ð $ í ©
% i . Eu 3+ _ < Ê| ¾ Ós 0.10 mol â Ä º ^ & h Ü ¼ Ð
&
ñ $ í s ¾ Ó © H d` ¦ · ú Ã º e % 3 Ü ¼ 9, (100) x 9 (102) x ß ¼_
© @ /& h [ jl ¸ JCPDS_ õ ü < q 5 p w < Ê` ¦ · ú Ã º e .
Fig. 4(b) H (100) x 9 (102) x ß ¼ % ò % i ` ¦ S X @ /ô Ç כ X <
Eu 3+ _ < Ê| ¾ Ós 0.05 mol ì r ´ ú Â Ò' (100) x 9 (102) x
Fig. 3. a) PLE and (b) PL spectra of Y 1−x BO 3 :Eu 3+ x phosphors synthesized at different temperatures 1000 ◦ C, 1100 ◦ C, and 1200 ◦ C.
ß
¼_ ¢ , a¼ # \ EuBO 3 © \ _ ô Ç x ß ¼[ þ t s z ` ¦ · ú Ã º e
.
FIg. 5 H 1200 ◦ C \ " f è ô Ç Y 1−x BO 3 :Eu 3+ x ì r ´ ú _
Eu 3+ < Ê| ¾ Ó (a) 0.05, (b) 0.10, (c) 0.15, Õ ªo ¦ (d) 0.20 mol \ É r & ñ + þ AI \ ¦ · ú Ðl 0 Aô Ç SEM s
. Fig. 5(a)-(d)\ _ Y 1−x BO 3 :Eu 3+ x ì r ´ ú _ â Ä
º Eu 3+ < Ê| ¾ Ó\ ' a > \ O s { 9 _ ß ¼l 400 - 600 nm
#
3 0 A\ " f _ { 9 & ñ % i Ü ¼ 9 & ñ + þ AI ¢ ¸ô Ç _ ½ ©{ 9
% i .
Fig. 6(a) H Eu 3+ < Ê| ¾ Ó\ É r 1200 ◦ C \ " f è ô Ç YBO 3 :Eu 3+ ì r ´ ú _ # l + þ AF g (photo-luminescence exci- tation: PLE) Û ¼& 7 à Ô! 3 ` ¦ · p כ s . Eu 3+ _ < Ê| ¾ Ó
\
' a > \ O s 200 nm\ " f 260 nm_ V , É r % ò % i \ 5 g
¸^ & ñ \ _ ô Ç # l Û ¼& 7 à Ô! 3 s > r F < Ê` ¦ · ú Ã º e .
Eu 3+ _ < Ê| ¾ Ós 0\ " f 0.15 mol Ð 7 £ x < Ê\ # l Û
¼& 7 à Ô! 3 x ß ¼ ° ú כs 7 £ x Eu 3+ _ < Ê| ¾ Ós 0.15\
"
f 0.20 mol Ð 7 £ x < Ê\ r y è < Ê` ¦ · ú Ã º e .
Fig. 6(b) H Eu 3+ _ < Ê| ¾ Ó\ É r 1200 ◦ C \ " f è ô Ç YBO 3 :Eu 3+ ì r ´ ú _ + þ AF g (photo-luminescence: PL) Û ¼& 7 à
Ô! 3 ` ¦ · p כ X <, Eu 3+ _ < Ê| ¾ Ó\ ' a > \ O s Eu 3+ _
5 D 0 → 7 F 1 ü < 5 D 0 → 7 F 2 s \ _ ô Ç + þ AF g x ß ¼[ þ t s 593 x 9 611 nm % ò % i \ " f y y z ¤Ü ¼ 9, Eu 3+ _ < Ê| ¾ Ó s
0.15 mol â Ä º, © Ä ºÃ ºô Ç + þ AF g : £ ¤$ í ` ¦ Í Ç r` ¦ S X
% i . Eu 3+ _ < Ê| ¾ Ós 0.20 mol â Ä º + þ AF g _ [ j l
y è % i H X < s כ É r Eu 3+ _ < Ê| ¾ Ó 7 £ x \ É r
&
ñ $ í , { 9 _ ß ¼l x 9 ç H{ 9 $ í _ o\ _ ô Ç y èü < 0 l x
¸ èY > (quenching) & ³ © \ _ ô Ç כ Ü ¼ Ð Ò q ty ½ + É Ã º e [10].
IV. + s Ç Â ] Ø
: r ½ ¨\ " f H Y 1−x BO 3 :Eu 3+ x + þ AF g ^ ì r ´ ú ` ¦ ¦ © ì ø Í 6
£ xZ O Ü ¼ Ð ] j ¸ # è : r ¸ü < Eu 3+ _ < Ê| ¾ Ó\ É r
Fig. 4. (a) XRD patterns of Y 1−x BO 3 :Eu 3+ x phosphors synthesized at 1200 ◦ C with different Eu 3+ concentra- tions 0.05, 0.10, 0.15 and 0.20, (b) Magnified the (100) and (102) peaks of XRD patterns.
&
ñ ½ ¨ ¸ü < ³ ð + þ A © , Õ ªo ¦ + þ AF g: £ ¤$ í ` ¦ ì r$ 3 % i .
&
ñ ½ ¨ ¸\ ¦ · ú l 0 AK XRD\ ¦ 6 x # & ñ © ` ¦ ' a ¹ 1 Ï
%
i ¦, (100) x 9 (102) ~ ½ Ó ¾ Ó_ Å Ò & ñ Ü ¼ Ð ° ú H & ñ
© Ü ¼ Ð $ í © % i Ü ¼ 9, è : r ¸ 7 £ x ½ + ÉÃ º2 ¤ & ñ $ í s
¾ Ó © H d` ¦ · ú Ã º e % 3 . ¢ ¸ô Ç, è : r ¸ 1000 ◦ C \ " f 1200 ◦ C Ð 7 £ x < Ê\ { 9 _ ß ¼l 7 £ x % i Ü ¼ 9, { 9
_ ß ¼l ¢ ¸ô Ç ç H{ 9 K & . # l Û ¼& 7 à Ô! 3 _ â Ä º è
Fig. 5. SEM images of Y 1−x BO 3 :Eu 3+ x phosphors syn- thesized at 1200 ◦ C with different Eu 3+ concentrations (a) 0.05, (b) 0.10, (c) 0.15 and (d) 0.20.
Fig. 6. (a) PLE and (b) PL spectra of Y 1−x BO 3 :Eu 3+ x phosphors synthesized at 1200 ◦ C with different Eu 3+
concentrations 0.05, 0.10, 0.15 and 0.20 mol.
: r ¸\ ' a > \ O s ¸^ & ñ \ _ ô Ç 200 nm\ " f 260 nm _ V , É r % ò % i \ " f > r F % i Ü ¼ 9, è : r ¸ 7 £ x ½ + É Ã
º2 ¤ # l Û ¼& 7 à Ô! 3 x ß ¼° ú כs 7 £ x % i . 235nm_ # l
© Ü ¼ Ð # l r & % 3 É r + þ AF g Û ¼& 7 à Ô! 3 É r è : r ¸\
'
a > \ O s Eu 3+ _ 5 D 0 → 7 F 1 ü < 5 D 0 → 7 F 2 s \ _ ô Ç + þ
AF g x ß ¼[ þ t s 593 x 9 611 nm % ò % i \ " f y y z ¤Ü ¼ 9, è : r ¸ 7 £ x ½ + Éà º2 ¤ % ò % i _ © \ 5 g" f + þ A F
g [ jl 7 £ x < Ê` ¦ · ú Ã º e % 3 . s Qô Ç s Ä » H + þ AF g _
´ òÖ ¦` ¦ & ñ H × æ כ ¹ô Ç כ ¹ Ü ¼ Ð ì r ´ ú _ & ñ $ í x 9
³
ð + þ A © ` ¦ [ þ t à º e H X <, è : r ¸ 7 £ x ½ + Éà º2 ¤ { 9 _
& ñ $ í s ¾ Ó © | ¨ c ÷ r ë ß m o < Æ& h ½ ¨$ í , { 9 ß ¼l ü
< C \ P Õ ªo ¦ { 9 ¸ ª s þ j& h o ÷ & H s Ä » Ð K $ 3
½
+ É Ã º e . Eu 3+ _ < Ê| ¾ Ó\ É r Y 1−x BO 3 :Eu 3+ x ì r ´ ú _
ü
< s \ _ ô þ x ß ¼[ s 593 x 611 nm % ò % i \ " f y y z ¤Ü ¼ 9, Eu 3+ _ < Ê| ¾ Ós 0.15 mol â Ä º © Ä ºÃ ºô Ç + þ AF g : £ ¤$ í ` ¦ Í Ç r` ¦ S X
%
i Ü ¼ 9, 0.20 mol\ " f H Eu 3+ < Ê| ¾ Ó_ Æ Ò& h 7 £ x \
É r & ñ $ í , { 9 _ ß ¼l x 9 ç H{ 9 $ í _ o\ _ ô Ç y
èü < 0 l x ¸ èY > (quenching) & ³ © \ _ ô Ç כ Ü ¼ Ð Ò q ty ) a
.
Y
c p w à U Ø ô
[1] S. Okamoto and H. Yamamoto, J. Appl. Phys. 91, 5492 (2002).
[2] C. B. Samantaray, M. L. Nanda Goswami, D. Bhat- tacharya, S. K. Ray and H. N. Ackarya, Materials Lett. 58, 2299 (2004).
[3] P. T. Diallo, K. Jeanlouis, P. Bontinaud, R. Mahiou and J. C. Cousseins, J. Alloy. Compd. 323, 218 (2001).
[4] E. Pinel, P. Boutinaid and R. Mahiou, J. Alloy.
Compd. 380, 225 (2004).
[5] J. K. Park, h. Ryu, H. D. Park and S. Y. Choi, J.
European Ceram. Doc. 21, 535 (2001).
[6] C. C. Klick and J. H. Schulman, Soild State Physics, 5th ed, F. Seitz and D. Turnbull (Academic Press., New York, 1957).
[7] M. Ren, J. H. Lin, Y. Dong, L.Q. Yang, M. Z. Su and L. P. You, Chem. Mater. 11, 1576 (1999).
[8] Z. G. Wei, L. D. Sun, C. S. Liao, J. L. Yin, X. C.
Jiang, C. H. Yan and S. Z. Lu, J. Phys. Chem. B 106, 10610 (2002).
[9] G. Chadeyron, M. El-Ghozzi, R. Mahiou, A. Arbus and J. C. Cousseins, J. Solid State Chem. 128, 261 (1997).
[10] X.-C. Jiang, C.-H. Yan, L.-D. Sun, Z.-G. Wei and C.-S. Liao, J. Solid State Chem. 175, 245 (2003).
[11] L. Wang and Y. Wang, J. of Lumin. 122-123, 921 (2007).
[12] Y. C. Kang, S. B. Park, I. W. Lenggor and K.
Okuyama, J, Phys. Chem. Solids 60, 379 (1999).
[13] H. K. Yang, K. S. Shim, S. B. Kim, J. H. Jeong,
S. S. Yi and S. T. Chung, SEAMULLI (New Phys.)
50, 165 (2005).
Photoluminescence Characteristics of Y 1−x BO 3 :Eu 3+ x Phosphors
Soung Soo Yi ∗
Department of Electronic Materials Engineering, Silla University, Busan 617-736 (Received 4 December 2008)
Y
1−xBO
3:Eu
3+x(x=0.05, 0.10, 0.15, and 0.20) phosphors for display applications were synthe- sized at sintering temperatures of 1000, 1100, and 1200
◦C by using a solid-state reaction method.
The crystallinity, surface morphology, and photoluminescence characteristics of the phosphors were investigated by using X-ray diffraction, scanning electron microscopy, and luminescence spectropho- tometry as functions of the sintering temperature and the Eu
3+ion concentration. According to the of X-ray diffraction results, the (100) and the (102)directions were the preferred orientations, and the phosphors showed a polycrystalline structure with (002), (110), and (104) peaks. The scanning electron microscopy images show that, as the sintering temperature increased, the parti- cle size increased and uniform. The photoluminescence intensity of the Y
1−xBO
3:Eu
3+xphosphors increased as the sintering temperature increased because of not only the improved crystallinity but also the increased particle size. The photoluminescence intensity of the Y
1−xBO
3:Eu
3+xphosphors was highest at x = 0.15 and decreased as the concentration of Eu
3+ions increased to x = 0.20 due to the concentration quenching effect.
PACS numbers: 78.55.-m, 78.20.-e
Keywords: Y
1−xBO
3:Eu
3+x, Red phosphor, Photoluminescence
∗