Luminescence, energy transfer and thermal stability of LiBaB9O15:Sm3+, Eu3+ for white LEDs
Luminescence, energy transfer and thermal stability of LiBaB9O15:Sm3+, Eu3+ for white LEDs
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白光 LED 的 LiBaB9O15:Sm3 、 Eu3 的发光、能量传输和热稳定性
DOI:
10.1016/j.materresbull.2015.06.006
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发表时间:
2015-10
影响因子:
5.4
通讯作者:
Feng Teng
中科院分区:
文献类型:
--
作者:
Qinglin Guo;Zhiping Yang;Xu Li;Feng Teng
A series of Sm3+, Eu3+, and Sm3+/Eu3+doped LiBaB9O15are synthesized by a high temperature solid-state method. LiBaB9O15:Eu3+can produce red emission (λex= 395 nm), and the peak locates at 616 nm, which is attributed to5D0→7F2transition of Eu3+. LiBaB9O15:Sm3+can create orange–red emission (λex= 395 nm), and the peak locates at 599 nm, which is assigned to4G5/2→6H7/2transition of Sm3+. The energy transfer from Sm3+to Eu3+in LiBaB9O15is confirmed by decay times of Sm3+. When the temperature is 150 °C, the emission intensity of Eu3+in LiBaB9O15:0.05Sm3+, 0.1Eu3+is decreased to 76% of the initial intensity at room temperature, and the activation energy is calculated to be 0.268 eV, which prove good thermal stability of LiBaB9O15:Sm3+, Eu3+. The emission intensity of LiBaB9O15:Sm3+, Eu3+can be tuned by tuning Eu3+content, and Commission International de I’Eclairage (CIE) chromaticity coordinates of LiBaB9O15:Sm3+, Eu3+are located in the red region.
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通讯作者:
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