Enhanced Stability and Brightness through Co‐Substitution: Promoting Plant Growth with Green‐Excited Deep Red Phosphor Ca1‐zSrzLi1‐xMg2xAl3‐xN4:yEu2+

IF 27.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2024-11-16 DOI:10.1002/adma.202414578

Pengpeng Wang, Yuhua Wang, Zebin Li, Haoyang Wang, Takatoshi Seto

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Abstract

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.

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通过共替代增强稳定性和亮度：利用绿激发深红荧光粉 Ca1-zSrzLi1-xMg2xAl3-xN4:yEu2+ 促进植物生长

该研究利用化学单元共置换策略，通过用[Mg-Mg]4+置换[Li-Al]4+，成功开发出一种新型蓝绿到绿色激发的深红色发光荧光粉--Ca1-zSrzLi1-xMg2xAl3-xN4:yEu2+（CLA-2xM-zS:yEu，0≤x≤0.8，0.003≤y≤0.01，0≤z≤1）。这种荧光粉能独特地将不可用的绿光转化为促进生长的深红色，是户外农业的最佳选择。7Li 核磁共振 (NMR) 光谱证实，掺入 Sr 会产生陷阱，导致发射峰红移，表明锂的存在和晶格的变化。与传统的 SrLi0.5MgAl2.5N4:0.005Eu2+ (SLMA) 和 SrLiAl3N4:0.005Eu2+ (SLA)相比，Ca0.2Sr0.8Li0.5MgAl2.5N4:0.005Eu2+（CLAM-0.8S）荧光粉在 85 °C/85% RH 的极端条件下仍能保持较高的发光强度，表现出优异的光致发光性能和化学稳定性。实验结果表明，Ca0.2Sr0.8Li0.8Mg0.4Al2.8N4:0.005Eu2+（CLA-0.4M-0.8S）制备的独特光转换薄膜主要由绿光激发，与 PP 薄膜相比，小球藻的光密度提高了 20%，与不使用任何薄膜的对照组相比，光密度显著提高了 97.5%。这些研究结果表明，这种薄膜在户外农业和其他领域的应用潜力巨大。

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.