2010 2851. 24 º 4 ¼ × ³ Vol.24 No.4
2010 «8¸ CHINESE JOURNAL OF MATERIALS RESEARCH August 2 0 1 0
Pr3+Ü · SrAl2O4 : Eu2+ ¢ 3+
Dy § §
° ß ´ ∗
»· ¡ Ð ØÎ Ð 710021)
ÈÐ Á
Ü
¸²
(
Ç Ç Pr ¿Ú SrAl O : Eu £Dy
3+
À± , Ø´ Pr ¿ À ªÚ Æ ¥ È
2+ 3+ 3+
Ú Â SrAl O ¸ Ï
2 4
, ¯À ÌÀ Ì , ´ ¹ 515 nm, Û À ´ 320 nm
¤
, 2 4
Ï 360 nm ÚÌ ¥ ¿ Pr ÆÄ ½¼Ú 3+
££Ú Æ ¬µ· ¿ Ú 3 ¥
¢© ¹©
,
Ý Ø ×½ , Ç , SrAl O , Ö ¿, À½ 2 4
O482, O614 Ø 1005-3093(2010)04-0343-05
Effect of Pr3+ on Luminescent Properties of SrAl2 O4 : Eu2+ ,
Dy3+ Phosphor Prepared by Combustion Synthesis
FAN Guodong∗∗ XIAO Guoping
(Key laboratory of Auxiliary Chemistry & technology for Chemical Industry,
Ministry of Education, Shaanxi university of Science & technology, Xi an Shanxi 710021)
* Supported by Scientific and technological project in Shaanxi Province No.2008K07-32.
Manuscript received May 5, 2010; in revised form May 26, 2010.
** To whom correspondence should be addressed, Tel:(029)86168933, E–mail: fangd@sust.edu.cn
¨
ABSTRACT Pr3+ doped SrAl2 O4 Eu2+ , Dy3+ phosphor was synthesized by combustion method.
The modification of optical properties of the sample has been investigated. X-ray diffraction pattern
indicates that the samples possess a monoclinic crystal structure. The emission spectra shows a continuous
luminescence band with a peak at 515nm and excitation spectra shows two peaks at 320 and 360 nm. The
decay curves show that the initial intensity is three times before doping praseodymium. The morphology
shows praseodymium has a great role in formating uniform grain size solid solution in SrAl2 O4 : Eu2+ ,
Dy3+ , Pr3+ phosphor.
KEY WORDS inorganic non-metallic materials, combustion, SrAl2 O4 , Pr3+ doping, luminous materials
À Þ Î °ÛØ §
¼ , È¿¢ µÊ ÝÆ ¤ §Æ ¼ Æ
Ê Á ¨ §§Á ؼ , ¬ ±È Î
[1] [2] [3,4]
¤
¼ , ´ ¤ ¼ ¤² » º Á Æ Æ ¨ Ð ¢Ô
´Î : ¢ Ö ÙÒØ Ö ¼ ¤Ð ÆÎ Ø º », Ä © ¶,
, § ZnS : Cu, Co ´ © ¢ ÙÒ ¹ © Ë Ä² Ø , ¨
ب Ð¢Ô , § SrAl2O4 : Eu, Dy ´ ¤ [5]
¤ Æ [6−12]
, Ʋ½ Æ Æ
¼ Ø ´«Î § Ì °¤ Æ ¬Ê, ¬ Ô ¬Ø
¼ Ø 10 §Å, ¶· Ï Ì Ò» Ôº« , ÇØ Ï ¶ Á ¬¤¸ ¬¿
Î ¨, Ü Ø¬ ² ¤ ¢ Ý ,
 ǥ 2008K07-32 Ï ÑØ´ Í × Â ½¨¹ÃÐ¢Ó §Ý Æ [13] ¤
Ç¥¥
*
– Æ Æ Sr3Al2O6 : Eu2+ Pr3+
¬ 5 ¹ 5 ÓÕƼª2010 ¬ 5 ¹ 26 ÓÕ º¼¥ , Pr3+ Ø¥ » Sr3 Al2O6 : Eu2+ Ø
½Ê
2010
: ƨ, Ô
¨ [14] ¤ ¼ Æ Pr3+ ½Ø SrAl2 O4 :
2. 344 ¼ × ³ 24º
Eu2+ 3+ , × ³ Pr3+ ½Æ ¨Ø Ä ¤ c=0.516 nm, β=93.415◦ , Ø ´ SrAl2 O4
±¡
Dy
ÎÁ, ÍÍ, Ö Î ¤£ ¥ Pr3+ Ø ½
Ï, SrAl2O4 ¸ 28.4◦ Î 29.9◦ ËØÙʳ ß, È
1
¯ ¢Ï ¾ ÎØ Al(NO3)3·9H2O Ï SrAl4O7 ØÆ ÙÊ³Í Ç ¤
Sr(NO3 )2 H3 BO3 H2 NCONH2 Eu2 O3 (4N) Pr3+ Ø ½Ï x=0.17% 600 § ¬,
Dy2 O3 (4N) Î Pr4 O7 (4N), Ê H3 BO3 Ø¡ Ç ÃØ ¤ 1 § Ç, ½
ÌÏ´ 3%, É¢ÔØ¡ ´ 7 : 1, Pr3+ Ø ° Û ¹ ¼ Ø ¤ «,
½Ï x ´ 0 0.13% 0.17% 0.23% Î 0.30%¤ Æ Æ SrAl2 O4 : Eu2+ Dy3+ ¼ , ½
Æ ß Ï É¢ ¡, Æ É¢ Ó ÏØ Pr3+ SrAl2 O4 Î Á, ÈÏÕÉÏ
ɢРΠ¢Ñ ° 80 §ÏÇ 30 min ½¼Ç ½Á ¤
Æ ¢Ì ¡¤ÆÎÌ ¡Ñ 80 §ÏÇ 1 Ç SrAl2 O4 Ø 5 ¿ Ùʳ (011)
2 h, »¯« ¡, Æ ß Ð Ò (−211) (221) (211) (031) Ø ÄÂ Ý ¼ ¤
¡¤ 600 §Ö¶ ʤ ¤ ß Ø , ¡
Ø ¤ µ 3–4 min È
° ( ß ª ° «°), ¹ Ø ß ³ ¬
«, Æ Ø ¼ Ø Ä¼´¦Ü ¤
ª ¦ ³
Ç ÏØ 2.2 Pr3+ SrAl2 O4 : Eu2+ Dy3+ Ú
Þ
¦ ¬
Ç Ô Û, ° Ç ÏØ , ¿ ÆÉ ½ Pr3+ ² ØÙ ¤·
ߧ± ¤ Æ Ú ×ÔÑÓ
2
º Ø ½ Pr Ù
3+
´Þ³¶´«ÁÒ, ½ Pr3+
¢ , ¾Ç ° × ß× Pr3+ ¸ 360 nm س ´, ¸ 320 nm Ø
½Ø SrAl2 O4 : Eu2+ Dy3+ ° ¤ ³ ¦ , »º Á Æ Ø µ ¤Á
D/max2200PC X Ê Ù Ê¥ Matsuzawa Ý [15]
»º Á Ø SrAl2 O4 :
Ø , CuKα µÊ, Ó´ 40 kV, ´
20 mA ¤ FluoroMax–4 Æ «¢ (Ù
´´ÑÛ) Ñ ØÙ Ê Î Ü
©» , Quanta250 FEG Þ ² ±
ز ٤
ƨ¶
Æ£Þ
2
³
2.1 Pr3+
1 µ ¥ØÑ É Pr3+
SrAl2 O4 : Eu2+ Dy3+
Á
Ú
SrAl2 O4 , º SrAl4O7 ½Á ¤ Pr Ø¥ ,
¤ 3+
Ñ Ê SrAl4 O7 Á¸ 31.2 Ë ÝØÆ ÙʳÏ
◦
© , SrAl2 O4 Á Ø Ù Ê³ ´¤Ò Pr3+ Ø 1 ¶ Pr3+ ¾ Ù Ù XRD
½Ï x=0.17% , SrAl4O7 ØÆ ÙÊ³Ê , ÙÊ Fig.1 X–ray diffraction patterns of samples doped
SrAl2 O4 Ø PDF ¿ (34–0379) Æ¬Ø with different Pr3+ additive (a) 0; (b) 0.13%;
¾ , ½ Û´ a=0.84424 nm; b=0.8822 nm; (c) 0.17%; (d) 0.23%; (e) 0.30%
Ù1 ¶ Pr3+ ¾ Ù ÅÃ
Table 1 Crystallite size of samples doped with different Pr3+ additive
Crystallite size/nm the average crystallite
Number
D011 D−211 D220 D211 D031 size/nm
1 30.5 25.4 37.9 27.4 26.5 29.5
2 31.3 28.5 35.4 26.8 25.4 29.5
3 33.0 29.1 30.8 32.1 26.9 29.5
4 33.0 29.1 31.9 28.7 26.3 29.8
5 33.7 30.4 34.6 32.6 26.6 31.6
3. 4 ŧÞ:Pr 3+
¾¯ SrAl O2 4 ¡
: Eu2+ Dy3+ ©Ù Å 345
2 ÙÚ 4 ٠ݪ¼À
Fig.2 Exission spectra of samples (a) samples doped
Fig.4 Decay curves of samples (a) samples doped
without Pr3+ additive;
without Pr3+ additive; (b) amples doped with
Pr3+ additive
× Ø ´, 4f6 5d→4f7 © ¨ §¾Ï
Ë, Õ Eu2+ ° Ø 5d ÃÖÕÔ °Ø
ÄÜ´ÖÍ, ¥ÅÖÈ ½Øµº ¦ 4f65d Ñ
Âب ´Ë ب , Ù Î
Ê ØÆ ¤ Ø Ê·Ç
Eu Ø Æ
3+
³, ÆÉ Ê Eu ¦ ±
3+
¿ ³´ Eu
« ³
2.3 Pr
Þ
3+
2+[18,19]
¤
SrAl2 O4 : Eu2+ 3+
Dy Ú ¦ µ
4 § Ç, ½ Pr3+ Ø §
Ù Ë
µ ½ Pr Ø Á µ , Ð Ü©É Ê ½
3
3+
Fig.3 Emission spectra of samples (b) samples doped
3+
with Pr additive
Pr3+ Ø « µ ½ Pr3+ ØÍ ( µ
3 )¤ §¾» Ê ¨ ÊØ Û
2+
Eu , Dy ,3+
Ù ¢¿ ³ Ë , ÏÝ Ù ©¨ Ø¡Ò, ´«¾» ¨
³ ¸ 365 nm, ³ ¸ 270 330 nm¤ ÊØ ¸ §§ Ù ©¨ Ø¡Ò¤
Æ , ³Ø ¸ Å ¤ 5 ¿ nm, ¨ Æ Í© ¨ Ø ³ , « ½Ø µ
ص ¦Ã¤ ¨ Ø ³ ¦µ ¤ §Î ´«
3 ¦ ¾ 360 nm ³ Ù Ø Ê ÒØ¨Ï ¤¤ IJةË, ¦Ç¨Ø
¤ Ø Ê ³ ¸ 515 nm, · ¥ÓÃ Ø , « »Ø¨Ï Ù ¤×
Æ ¤ »º Á Ø SrAl2O4 : Eu2+, ¢¢ØÙ Ê Ø¨Ï, Ø «
Dy3+
Æ Ø
Ê (³ ¸ Å 520 nm) ,
§ , ÄÂ Ë, ² ¸
Ê »¤
¥ ³
³ ¸ Å È ³ È ¤¦¤ ³« ¨ , 2.4 Pr3+ SrAl2 O4 : Eu2+ Dy3+ Ú
Þ
¦
60–90 nm ¤Ë ÄØÏ Â Ì ¬Óè , µ ½ Pr3+ Ø , Æ ¢ Û
³Ø¸Å ¤¤ Ä ( 5a); ½ Pr Ø 3+
«ÍÍ,
ØÙ Î Ê , ´ ¢Á ( 5b) ¤ Í Ç XRD Ø
Ø Eu2+ Ê Ø 4f6 5d–4f7 ¶± [16] , ¢Ã¤Ð Ä Ëµ¼», ¨ Æ Ä
Ravichandran Ý [17] ² ³ SrAl2 O4 : Eu2+ ¶¤ ¶Ø , ¨ ÄØ Ý¨µ¼
Dy 3+
¼ Ø Ê ¾ ¤ ¤ 4f–5d » £Í È ÝŠت ¦Ã¤
4. 346 ¼ × ³ 24 º
5 Ù³ Ú
Fig.5 SEM morphologies of the samples (a) samples doped without Pr3+ additive; (b) samples doped
Æ
with Pr3+ additive
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