In this work, Ca₃MgSi₂O₈:Bi³⁺, Ca₃MgSi₂O₈:xEu³⁺ (x = 0, 2, 4, 6, 8, and 10 mol%), and Ca₃MgSi₂O₈:6%Eu³⁺, yBi³⁺ (y = 2, 4, 6, 8, and 10 mol%) phosphors are prepared via the high-temperature solid-state reaction method in air. Their crystal structure and luminescence properties are studied. The excitation spectrum with two peaks at ~ 250 and 320 nm of Ca₃MgSi₂O₈:Bi³⁺ phosphor can be observed in the range of 225–380 nm because of the ¹S₀ → ¹P₁ and ³P₁ transitions, and its emission spectrum peaking at ~ 410 nm is in the region from 340 to 650 nm owing to the ³P_1,0 → ¹S₀ transition of Bi³⁺ ion. The excitation spectrum of Ca₃MgSi₂O₈:Eu³⁺ phosphor in the range of 220–550 nm is found owing to the f–f transition of Eu³⁺ ion, and its emission spectrum under excitation at 394 nm includes five emission spectral bands in the region from 575 to 720 nm due to the ⁵D₀ → ⁷F₀, ⁷F₁, ⁷F₂, ⁷F₃, and ⁷F₄ transitions of Eu³⁺ ion. The luminous performance improvement of Ca₃MgSi₂O₈:Eu³⁺ phosphor via co-doping Bi³⁺ ions is investigated. The emission spectra of Ca₃MgSi₂O₈:Eu³⁺, Bi³⁺ phosphor under excitation at 320 and 394 nm mainly come from the ⁵D₀ → ⁷F₀, ⁷F₁, ⁷F₂, ⁷F₃, and ⁷F₄ transitions of Eu³⁺ ion due to energy transfer from Bi³⁺ to Eu³⁺ ions. We observe the tunable emission properties of Ca₃MgSi₂O₈:Eu³⁺, Bi³⁺ phosphor and use the energy level diagrams of Bi³⁺ and Eu³⁺ ions to explain the luminous mechanism. The results infer that Ca₃MgSi₂O₈:Eu³⁺, Bi³⁺ phosphor has application prospect in white light-emitting diode excited by near ultraviolet light.

在这项工作中，Ca ₃ MgSi ₂ O ₈ :Bi ³⁺、Ca ₃ MgSi ₂ O ₈ : x Eu ³⁺ ( x  = 0、2、4、6、8和10 mol%)和Ca ₃ MgSi ₂ O ₈ :6%Eu ³⁺ , yBi ³⁺ ( y  = 2, 4, 6, 8, 10 mol%)荧光粉是通过空气中的高温固相反应法制备的。研究了它们的晶体结构和发光特性。Ca ₃ MgSi ₂ O ₈的激发光谱在 ~ 250 和 320 nm 处具有两个峰由于¹ S ₀ → ¹ P ₁和³ P ₁跃迁，可以在 225–380 nm 范围内观察到：Bi ³⁺磷光体，其发射光谱在 410 nm 处达到峰值，在 340 到 650 nm 范围内由于Bi ³⁺离子的³ P _1,0 → ¹ S ₀跃迁。Ca ₃ MgSi ₂ O ₈ :Eu ³⁺荧光粉的激发光谱在 220–550 nm 范围内是由于Eu ³⁺的f – f跃迁由于⁵ D ₀ → ⁷ F ₀、⁷ F ₁、⁷ F ₂、⁷ F ₃和⁷ F ，其在 394 nm 激发下的发射光谱包括 575 至 720 nm 区域的五个发射光谱带Eu ³⁺离子的_{4 个}跃迁。研究了通过共掺杂Bi ³⁺离子提高Ca ₃ MgSi ₂ O ₈ :Eu ³⁺荧光粉的发光性能。Ca ₃ MgSi ₂的发射光谱ø ₈：Eu的³⁺，铋³⁺激发下荧光体在320和394纳米的主要来自于⁵ d ₀ → ⁷ ˚F ₀，⁷ ˚F ₁，⁷ ˚F ₂，⁷ ˚F ₃，和^7个˚F _4个的Eu跃迁^{3 +}离子由于能量从 Bi ³⁺转移到 Eu ³⁺离子。我们观察到 Ca ₃ MgSi ₂ O ₈ :Eu ³⁺ , Bi ³⁺的可调发射特性荧光粉并使用Bi ³⁺和Eu ³⁺离子的能级图来解释发光机制。结果表明Ca ₃ MgSi ₂ O ₈ :Eu ³⁺ , Bi ³⁺荧光粉在近紫外光激发的白光发光二极管中具有应用前景。