下一代led通过Ca₂Ga₂GeO₇中Bi3+→Eu3+能量转移的镧系激活单荧光粉白光发射

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-09 DOI:10.1016/j.matlet.2026.140236

K.N. Chethana , Nitesh S. Kanojiya , Reshmi T.Parayil , S. Sreevalsa , Subrata Das , Manish Kumar Mishra , Santosh K. Gupta

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引用次数: 0

摘要

我们报道了用于高性能暖白光发光二极管（led）的Bi3+和Eu3+共掺杂Ca2Ga2GeO7 （CGGO）荧光粉的设计和制造。该荧光粉表现出高效的Bi3+→Eu3+能量传递，表现为光谱重叠，Eu3+发射增强，Bi3+发射随Eu3+含量的增加而猝灭。随着Eu3+的增加，发射颜色由蓝色向红色转变，在3% Eu3+ (x = 0.33, y = 0.28)时实现近白色发射，在10% Eu3+时最大能量转移效率为74%。结合到led中产生稳定的暖白色发射（CCT ~ 2100 K），具有良好的显色指数和色度，证明适合高温应用。这些结果表明，CGGO:Bi3++Eu3+荧光粉是下一代高性能暖白光led的有希望的候选材料，具有可调发射，优异的热稳定性和实用性。

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Lanthanide-activated single-phosphor white light emission via Bi3+ → Eu3+ energy transfer in Ca₂Ga₂GeO₇ for next-generation LEDs

We report the design and fabrication of Bi³⁺ and Eu³⁺ co-doped Ca₂Ga₂GeO₇ (CGGO) phosphors for high-performance warm-white light-emitting diodes (LEDs). The phosphor exhibits efficient Bi³⁺ → Eu³⁺ energy transfer, as evidenced by spectral overlap, enhanced Eu³⁺ emission, and quenching of Bi³⁺ emission with increasing Eu³⁺ content. The emission color shifts from blue to red with increasing Eu³⁺, achieving near-white emission at 3% Eu³⁺ (x = 0.33, y = 0.28) and a maximum energy transfer efficiency of 74% at 10% Eu³⁺. Incorporation into LEDs yields stable warm-white emission (CCT ∼2100 K) with good color rendering index and chromaticity, demonstrating suitability for high-temperature applications. These results establish CGGO:Bi³⁺+Eu³⁺ phosphors as promising candidates for next-generation high-performance warm-white LEDs with tunable emission, excellent thermal stability, and practical applicability.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive