As a cyan-emitting oxonitridosilicate phosphor, BaSi₂O₂N₂:Eu²⁺ can be used as a competent cyan compensator to improve the color rendering index of white light-emitting diodes (WLEDs). However, low luminescence efficiency and poor thermal stability of this type of phosphor seriously suppress its actual application in full-spectrum lighting. The replacements of Ba²⁺ by Lu³⁺ and Ba²⁺-Si⁴⁺ by Lu³⁺-Al³⁺ can greatly increase the luminescence intensity and improve the thermal stability at the same time. With Lu³⁺ doping, the internal quantum efficiency η_IQE of Ba_0.925Si₂O₂N₂:0.03Eu²⁺,0.045Lu³⁺ is 24.08% higher than that of Ba_0.97Si₂O₂N₂:0.03Eu²⁺. After Al³⁺ co-doping, the η_IQE is further increased by 10.31% compared to Ba_0.925Si₂O₂N₂:0.03Eu²⁺,0.045Lu³⁺. When the temperature rises to 473 K, the luminescence intensity of Ba_0.925Si₂O₂N₂:0.03Eu²⁺,0.045Lu³⁺ maintains 62.32% of that at room temperature, which increases by 17.35% in relative to the Ba_0.97Si₂O₂N₂:0.03Eu²⁺, while the luminescence intensity of Ba_0.925Si_1.97O₂N₂:0.03Eu²⁺,0.045Lu³⁺,0.03Al³⁺ keeps 73.87% of the initial value, which increases by 18.52% compared to Ba_0.925Si₂O₂N₂:0.03Eu²⁺,0.045Lu³⁺. The mechanisms for luminescence and thermal stability improvement are proposed. The Ba_0.925Si_1.97O₂N₂:0.03Eu²⁺,0.045Lu³⁺,0.03Al³⁺ cyan phosphor, Y₃Al₅O₁₂:Ce³⁺ yellow phosphor and CaAlSiN₃:Eu²⁺ red phosphor are mixed thoroughly and coated on a blue LED (450 nm) to assemble a WLED. The WLED demonstrates a color rendering index (R_a) of 97.1 at 150 mA, and the R₁–R₁₅ values are all above 90. The results indicate that as an effective cyan compensator in WLED, the BaSi₂O₂N₂:Eu²⁺,Lu³⁺,Al³⁺ phosphor has great application prospect in the field of full-spectrum lighting.

BaSi ₂ O ₂ N ₂ :Eu ²⁺作为发青色的氧氮硅酸盐磷光体，可用作有效的青色补偿剂，以提高白光发光二极管（WLED）的显色指数。然而，该类荧光粉发光效率低、热稳定性差，严重制约了其在全光谱照明中的实际应用。Lu ³⁺替代Ba ²⁺和Lu ³⁺ -Al ³⁺替代Ba ²⁺ -Si ⁴⁺可以大大提高发光强度，同时提高热稳定性。Lu ³⁺掺杂，内量子效率Ba _0.925 Si ₂ O ₂ N ₂ :0.03Eu ²⁺ ,0.045Lu ^{3+ 的}η _IQE比Ba _0.97 Si ₂ O ₂ N ₂ :0.03Eu ²⁺高24.08% 。Al ³⁺共掺杂后，与Ba _0.925 Si ₂ O ₂ N ₂ :0.03Eu ²⁺ ,0.045Lu ³⁺相比，η _IQE进一步提高了10.31% 。当温度升至 473 K 时，Ba _0.925 Si的发光强度₂ O ₂ N ₂ :0.03Eu ²⁺ ,0.045Lu ³⁺保持室温的62.32%，相对于Ba _0.97 Si ₂ O ₂ N ₂ :0.03Eu ²⁺增加17.35% ，而发光Ba _0.925 Si _1.97 O ₂ N ₂ :0.03Eu ²⁺ ,0.045Lu ³⁺ ,0.03Al ^{3+ 的}强度保持初始值的73.87%，比Ba _0.925 Si ₂ O ₂ N ₂提高18.52%:0.03Eu ²⁺ ,0.045Lu ³⁺。提出了提高发光和热稳定性的机制。Ba _0.925 Si _1.97 O ₂ N ₂ :0.03Eu ²⁺ ,0.045Lu ³⁺ ,0.03Al ³⁺青色荧光粉、Y ₃ Al ₅ O ₁₂ :Ce ³⁺黄色荧光粉和CaAlSiN ₃ :Eu ²⁺红色荧光粉混合彻底并涂在蓝色 LED (450 nm) 上以组装 WLED。WLED在 150 mA 时的显色指数 ( R _a ) 为 97.1，而R ₁– R ₁₅值均在90以上。结果表明，BaSi ₂ O ₂ N ₂ :Eu ²⁺ ,Lu ³⁺ ,Al ³⁺荧光粉作为WLED中有效的青色补偿剂，在全光领域具有广阔的应用前景。 - 光谱照明。