Realization of blue-red dual-emission via energy transfer in Na3KMg7(PO4)6: Eu2+, Mn2+ phosphor for plant growth application

IF 7.2 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2024-09-13 DOI:10.1016/j.jre.2024.09.012

Ruijie Ji, Takatoshi Seto, Yuhua Wang

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Abstract

A blue-red dual-emitting phosphor, Na₃KMg₇(PO₄)₆: Eu²⁺, Mn²⁺ was developed in this study. Eu²⁺ acts as a sensitizer ion in Na₃KMg₇(PO₄)₆: Mn²⁺, which significantly improves the undesirable luminous efficiency of Mn²⁺. The energy transfer between Eu²⁺ and Mn²⁺ significantly boosts both internal quantum efficiency (IQE) and external quantum efficiency (EQE) of the phosphor, achieving values of 72.5% and 42.6%, respectively. Additionally, the phosphor demonstrates exceptional thermal stability, at 150 °C, maintaining 71.49% of its initial emission intensity. The emission spectrum of the phosphor closely matches the chlorophyll's absorption spectra, with similarities of 75.06% and 94.52%, respectively. This was further confirmed through a fabricated LED with a n-UV chip (395 nm). To further assess the potential for agritech applications, a light-conversion film incorporating the developed phosphor in PDMS glue was prepared. An outdoor cultivation trial with Chlorella showed that the algae's growth rate improves by 27.3% relative to a control group. These results reveal the significant potential of the Na₃KMg₇(PO₄)₆: Eu²⁺, Mn²⁺ phosphor for enhancing plant growth in practical applications.

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Na3KMg7(PO4)6: Eu2+， Mn2+荧光粉中的能量转移实现蓝-红双发射，用于植物生长

本研究制备了蓝红色双发射荧光粉Na3KMg7(PO4)6: Eu2+, Mn2+。Eu2+在Na3KMg7(PO4)6: Mn2+中作为敏化剂离子，显著改善了Mn2+的发光效率。Eu2+和Mn2+之间的能量传递显著提高了荧光粉的内量子效率（IQE）和外量子效率（EQE），分别达到72.5%和42.6%。此外，该荧光粉表现出优异的热稳定性，在150°C时，保持其初始发射强度的71.49%。荧光体的发射光谱与叶绿素的吸收光谱非常接近，相似度分别为75.06%和94.52%。通过采用n-UV芯片（395 nm）制造的LED进一步证实了这一点。为了进一步评估其在农业技术上的应用潜力，我们在PDMS胶中制备了一种包含所开发的荧光粉的光转换膜。室外小球藻培养试验表明，与对照组相比，小球藻的生长速度提高了27.3%。这些结果揭示了Na3KMg7(PO4)6: Eu2+， Mn2+荧光粉在实际应用中促进植物生长的巨大潜力。

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.