The research utilized a strategy of chemical unit co‐substitution, successfully developing a novel blue‐green to green excited, deep red‐emitting phosphor, Ca1‐zSrzLi1‐xMg2xAl3‐xN4:yEu2+ (CLA‐2xM‐zS:yEu, 0≤x≤0.8, 0.003≤y≤0.01, 0≤z≤1), through the replacement of [Li−Al]4+ by [Mg−Mg]4+. This phosphor uniquely converts unusable green light to growth‐enhancing deep red, optimizing it for outdoor agriculture. Doping with Sr creates traps, causing a redshift in emission peaks, as confirmed by 7Li nuclear magnetic resonance (NMR) spectra, indicating Li presence and lattice changes. Ca0.2Sr0.8Li0.5MgAl2.5N4:0.005Eu2+ (CLAM‐0.8S) phosphor maintained high luminescence intensity under extreme conditions of 85 °C/85% RH, demonstrating excellent photoluminescence performance and chemical stability, compared with conventional SrLi0.5MgAl2.5N4:0.005Eu2+ (SLMA) and SrLiAl3N4:0.005Eu2+(SLA). Experimental results surprised that the unique Ca0.2Sr0.8Li0.8Mg0.4Al2.8N4:0.005Eu2+ (CLA‐0.4M‐0.8S) prepared light‐converting film, which is mainly excited by green light, demonstrated a 20% increase in optical density of Chlorella compared to the PP film and a remarkable 97.5% increase compared to the control group without any film. These findings suggest that this film has significant potential for applications in outdoor agriculture and other fields.

中文翻译：

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通过共取代增强稳定性和亮度：用绿色激发的深红色荧光粉 Ca1‐zSrzLi1‐xMg2xAl3‐xN4：yEu2+ 促进植物生长


该研究利用化学单元共取代的策略，成功开发了一种新型的蓝绿到绿激发的深红色荧光粉Ca1‐zSrzLi1‐xMg2xAl3‐xN4：yEu2+ （CLA‐2xM‐zS：yEu， 0≤x≤0.8， 0.003≤y≤0.01， 0≤z≤1），通过将 [Li-Al]4+ 替换为 [Mg-Mg]4+。这种荧光粉以独特的方式将无法用的绿光转化为促进生长的深红光，从而优化了户外农业。掺杂 Sr 会产生陷阱，导致发射峰出现红移，7Li 核磁共振 （NMR） 光谱证实了这一点，表明 Li 的存在和晶格变化。Ca0.2Sr0.8Li0.5MgAl2.5N4：0.005Eu2+ （CLAM-0.8S） 荧光粉在85 °C/85% RH的极端条件下保持较高的发光强度，与常规的SrLi0.5MgAl2.5N4：0.005Eu2+ （SLMA） 和SrLiAl3N4：0.005Eu2+（SLA）相比，表现出优异的光致发光性能和化学稳定性。实验结果令人惊讶的是，独特的 Ca0.2Sr0.8Li0.8Mg0.4Al2.8N4：0.005Eu2+ （CLA-0.4M-0.8S） 制备的光转换膜，主要由绿光激发，与 PP 膜相比，小球藻的光密度增加了 20%，与没有任何薄膜的对照组相比，显着增加了 97.5%。这些发现表明，这种薄膜在户外农业和其他领域具有巨大的应用潜力。