Abstract We report narrow-band green-red emitting Mg2SiO4 phosphors successfully synthesized through solid-state reaction method, and the cathodoluminescence (CL) and photoluminescence (PL) properties of the samples were investigated in detail. Under electron beam and 275 nm excitation, Mg2SiO4 phosphors doped with various Eu3+ and Tb3+ concentrations in the range of 1 mol % up to 10 mol % exhibit typical green and red emissions, respectively. Tb doped samples were efficiently excited by a low voltage electron beam and UV light, yielding several emission peaks between 370 and 760 nm, and produced a bright green light peaking at 541 nm due to the 5D4 →7F5 transition. Eu3+ doped samples exhibited CL and PL emission spectra from 5D0 to 7Fj manifold transitions of Eu3+. A strong red-light emission peaking at 610 nm also supports the incorporation of Eu3+ ions. A concentration quenching effect was observed and discussed for both phosphors. The optimal doping concentration of Eu3+ and Tb3+ doped phosphors was 7 mol %. In view of the outstanding performance in the PL and CL, the Mg2SiO4:Eu3+, Tb3+ can be considered as a promising green and red phosphor in solid-state lighting applications.

中文翻译：

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固态反应制备Eu和Tb掺杂Mg2SiO4的光致发光和阴极发光综合研究

摘要 我们报道了通过固态反应法成功合成的窄带绿红光Mg2SiO4 荧光粉，并详细研究了样品的阴极发光（CL）和光致发光（PL）特性。在电子束和 275 nm 激发下，掺杂 1 mol% 至 10 mol% 的各种 Eu3+ 和 Tb3+ 浓度的 Mg2SiO4 磷光体分别表现出典型的绿色和红色发射。Tb 掺杂的样品被低压电子束和紫外光有效激发，在 370 和 760 nm 之间产生几个发射峰，并由于 5D4 →7F5 跃迁而产生在 541 nm 处达到峰值的亮绿色光。Eu3+ 掺杂的样品表现出从 Eu3+ 的 5D0 到 7Fj 流形跃迁的 CL 和 PL 发射光谱。峰值为 610 nm 的强红光发射也支持 Eu3+ 离子的掺入。观察并讨论了两种磷光体的浓度猝灭效应。Eu3+ 和 Tb3+ 掺杂磷光体的最佳掺杂浓度为 7 mol%。鉴于在 PL 和 CL 方面的出色表现，Mg2SiO4:Eu3+、Tb3+ 可以被认为是固态照明应用中很有前途的绿色和红色荧光粉。