Luminescence and energy transfer of Eu2+/Mn2+ co-doped SiO2–Al2O3–ZnO–K2O glass ceramics for white LEDs
Luminescence and energy transfer of Eu2+/Mn2+ co-doped SiO2–Al2O3–ZnO–K2O glass ceramics for white LEDs
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DOI：
10.1016/j.jlumin.2010.07.023
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发表时间：
2010-12
影响因子：
3.6
通讯作者：
Renguang Ye;Shiqing Xu;Degang Deng;Youjie Hua;Huanping Wang;Chenxia Li;Shilong Zhao;Lihui Huang
中科院分区：
文献类型：
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作者：
Renguang Ye;Shiqing Xu;Degang Deng;Youjie Hua;Huanping Wang;Chenxia Li;Shilong Zhao;Lihui Huang
在还原气氛下制备了含β-Zn 2SiO 4纳米晶的Eu 2 +/Mn 2+共掺杂新型透明微晶玻璃（GC）。这些样品的光学性质进行了研究。在紫外光照射下，Eu 2 +/Mn 2+共掺微晶玻璃在458和560 nm处出现两个宽带发射峰，分别归属于Eu 2+的4f 65 d1 → 4f 7跃迁和Mn 2+的4 T1（4G）→ 6A 1（6S）跃迁。通过直接观察Mn ~（2+）的激发光谱和Eu ~（2+）的发射光谱的明显重叠，发现了Eu ~（2+）向Mn ~（2+）的能量转移。通过对具有各种激活剂（Mn 2+）浓度的样品进行荧光研究，进一步证实了玻璃陶瓷中从Eu 2+到Mn 2+的ET。最佳组合物产生具有色度坐标（0.291，0.344）的白色光。结果表明，Eu 2 +/Mn 2+共掺杂微晶玻璃是一种很有潜力的白色发光二极管（LED）材料。
Transparent Eu2+/Mn2+co-doped new glass ceramics (GC) containing β-Zn2SiO4nanocrystals were prepared under a reduced atmosphere. The optical properties of these samples have been investigated. The emission spectra of Eu2+/Mn2+co-doped glass ceramics show two broadband peakings at 458 and 560nm under ultraviolet radiation, which can be attributed to 4f65d1→4f7transition of Eu2+and4T1(4G)→6A1(6S) transition of Mn2+, respectively. Energy transfer (ET) from Eu2+to Mn2+is discovered by directly observing significant overlap of the excitation spectrum of Mn2+and the emission spectrum of Eu2+. ET from Eu2+to Mn2+in glass ceramics is further confirmed by fluorescence studies performed on the samples with various activator (Mn2+) concentrations. The optimal composition generates white light with chromaticity coordinates (0.291, 0.344). The results indicate that Eu2+/Mn2+co-doped glass ceramics is potential material for white light-emitting diodes (LEDs).