Luminescence and energy transfer of Eu- and Mn-coactivated CaAl2Si2O8 as a potential phosphor for white-light UVLED

被引:500
作者
Yang, WJ
Luo, LY
Chen, TM [1 ]
Wang, NS
机构
[1] Natl Chiao Tung Univ, Phosphors Res LAb, Hsinchu 30050, Taiwan
[2] Natl Chiao Tung Univ, Inst Mol Sci, Dept Appl Chem, Hsinchu 30050, Taiwan
关键词
D O I
10.1021/cm050638f
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A series of Eu2+- and Mn2+-coactivated CaAl2Si2O8 phosphors have been synthesized at 1400 degrees C under a reduced atmosphere and their luminescence properties have been investigated as a function of activator and coactivator concentrations. We have discovered that energy transfers from Eu2+ to Mn2+ by directly observing significant overlap of the excitation spectrum of Mn2+ and the emission spectrum of Eu2+ as well as the systematic relative decline and growth of emission bands of Eu2+ and Mn2+, respectively. The critical distance and average separation of Eu2+ and Mn2+ have also been calculated. By utilizing the principle of energy transfer, we have also demonstrated that with appropriate tuning of activator content CaAl2Si2O8:Eu2+ Mn2+ phosphors exhibit great potential to act as a phosphor for white-light ultraviolet light-emitting diodes (UVLEDs).
引用
收藏
页码:3883 / 3888
页数:6
相关论文
共 20 条
[1]  
ALTERMATT UD, 1987, ACTA CRYSTALLOGR A, V34, P125
[2]  
ANGEL RJ, 1988, AM MINERAL, V73, P1114
[4]   Energy transfer in Sm3+:Eu3+ system in zinc sodium phosphate glasses [J].
Biju, PR ;
Jose, G ;
Thomas, V ;
Nampoori, VPN ;
Unnikrishnan, NV .
OPTICAL MATERIALS, 2004, 24 (04) :671-677
[5]  
BLASSE G, 1969, PHILIPS RES REP, V24, P131
[6]   LUMINESCENCE AND ENERGY-TRANSFER IN CAF2 SLIGHTLY DOPED WITH EUROPIUM AND MANGANESE [J].
CALDINO, U ;
MUNOZ, A ;
RUBIO, J .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (27) :6071-6078
[7]   ENERGY-TRANSFER IN CACL2-EU-MN CRYSTALS [J].
CALDINO, UG ;
MUNOZ, AF ;
RUBIO, JO .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1993, 5 (14) :2195-2202
[8]   A THEORY OF SENSITIZED LUMINESCENCE IN SOLIDS [J].
DEXTER, DL .
JOURNAL OF CHEMICAL PHYSICS, 1953, 21 (05) :836-850
[9]   THEORY OF CONCENTRATION QUENCHING IN INORGANIC PHOSPHORS [J].
DEXTER, DL ;
SCHULMAN, JH .
JOURNAL OF CHEMICAL PHYSICS, 1954, 22 (06) :1063-1070
[10]  
Grabmarier B. C., 1994, LUMINESCENT MAT, P96