Photoluminescent Properties of ( La , Eu , Sm ) 2W3O12 Red Phosphor for Near-UV-LED-Based Solid-State Lighting
Photoluminescent Properties of ( La , Eu , Sm ) 2W3O12 Red Phosphor for Near-UV-LED-Based Solid-State Lighting
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DOI：
10.1149/1.2767003
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发表时间：
2007-10
影响因子：
--
通讯作者：
S. Okamoto;Hajime Yamamoto
中科院分区：
文献类型：
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作者：
S. Okamoto;Hajime Yamamoto
研究了Sm3+共掺杂（La，Eu）2W3O12在近紫外光激发下的发光性质。L0.5Eu1.5W3O12在616nm处有很好的红光发射，在395nm光激发下，其光致发光峰强度比Y2O2S：Eu3+高1.7倍。在405nm光激发下，0.1molSm3+共掺杂La0.5Eu1.5W3O12的发光峰强度比Y2O2S：Eu3+高5倍以上。这些结果表明，Sm3+共掺杂的（La，Eu）2W3O12是一种近紫外发光二极管（LED）用红色荧光粉的候选材料，但Sm3+共掺杂会增加发光的热猝灭。
Luminescent properties of Sm 3+ -co-doped (La,Eu) 2 W 3 O 12 under near-UV light excitation have been investigated. L 0.5 Eu 1.5 W 3 O 12 shows efficient red emission at 616 nm and is about 1.7 times higher than Y 2 O 2 S:Eu 3+ in photoluminescence (PL) peak intensity under 395 nm light excitation. Meanwhile, 0.1 mol Sm 3+ -co-doped La 0.5 Eu 1.5 W 3 O 12 is over 5 times higher than Y 2 O 2 S:Eu 3+ in PL peak intensity under 405 nm light excitation. These results imply that Sm 3+ -co-doped (La,Eu) 2 W 3 O 12 is a candidate of red phosphors for near-UV light-emitting diodes (LEDs), though the Sm 3+ co-doping causes an increase in thermal quenching of PL.