高效的红色/色-红色发射Eu3+和Sm3+/Eu3+联合化和它们的多功能应用
Priyadarshini Pradhan1, Sivakumar Vaidyanathan2
1Department of Chemistry, National Institute of Technology, Rourkela, Odisha - 769008, India.
Dalton transactions (Cambridge, England : 2003)
|February 25, 2025
概括
新的红色发射,Li2La4(MoO4)7:Eu3+,被合成用于增强的白色发光二极管 (WLED) 和安全应用. 这些材料具有高颜色纯度,优异的热稳定性,并有可能促进植物生长.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 在先进的照明和安全应用中,开发高效的红色发射极为重要.
- 欧 (Eu3+) 兴奋剂是一种在各种宿主材料中实现红色辐射的常见策略.
- 了解新型的合成-结构-性质关系对于优化其性能至关重要.
研究的目的:
- 为了合成和描述新型的窄带,红色发射Li2La4(MoO4) 7:Eu3+ (LLM:Eu) .
- 为了研究光物理性质,包括激发-发射光谱,颜色纯度和量子效率.
- 评估白色发光二极管 (WLED) 和安全技术的热稳定性和潜在应用.
主要方法:
- 使用高温常规固态合成来制备LLM:Eu.
- 使用X射线衍射 (XRD) 来确认晶体结构和空间组 (I41/a).
- 光发光谱学被用来分析激发和发射光谱,量子效率和温度依赖的发光.
主要成果:
- 四边形Li2LaMoO4光被成功合成,在近紫外线或蓝光激发后发射红光 (λ = 616 nm).
- 最优的组成,Li2La7:1.8Eu3+,呈现出高颜色纯度 (97.28%) 和89.6%的内部量子效率 (IQE).
- 固体溶液的IQE (92.54%) 和热稳定性 (86.12%在423K) 提高.
- 包含这些光素的WLED显示出更好的色彩染指数 (CRI) 和相关色彩温度 (CCT).
结论:
- 合成的Li2La4(MoO4)7:Eu3+光素是有前途的红色发射材料,具有出色的光物理性能和热稳定性.
- 这些可以有效地提高WLED的性能,提供可调节的白光发射.
- 突出了安全功能 (防伪,隐藏指纹检测) 和促进植物生长的LED的潜在应用.
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