Thermal stable NaMgLaTeO6:Dy3+ double perovskite yellow phosphors for w-LEDs and latent fingerprint visualization

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-09-21 DOI:10.1016/j.materresbull.2024.113098

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Abstract

The novel Dy³⁺-doped NaMgLaTeO₆ (NaMgLaTeO₆:Dy³⁺) phosphors were produced through a high-temperature solid-state reaction. X-ray diffraction (XRD) analysis and Rietveld refinement manifest that the pure phosphor was committed to the space group (P2_1/m (11)) and features the double perovskite structure. The band gap (E_g) of the direct semiconductor NaMgLaTeO₆ is calculated to be 2.065 eV. Under 388 nm excitation, the ⁴F_9/2→⁶H_13/2 energy level transition contributes to the maximum emission peak at 572 nm. Other properties of the phosphor include optimal concentration (x = 5 mol %), high thermal stability, activation energy (E_a = 0.31 eV), and internal quantum efficiency (IQE = 31.44 %). The relevant color coordinate of the white light emitting diode (w-LED) prepared by the phosphor is (0.298, 0.311). The features of the latent fingerprint (LFP) created by NaMgLaTeO₆:Dy³⁺ can be clearly reflected on different surfaces. In summary, NaMgLaTeO₆:Dy³⁺ phosphor has proven high potential in w-LEDs production and LFP detection.

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热稳定 NaMgLaTeO6:Dy3+ 双包晶黄色荧光粉，用于 w-LED 和潜指纹可视化

新型掺杂 Dy3+ 的 NaMgLaTeO6（NaMgLaTeO6:Dy3+）荧光粉是通过高温固态反应制得的。X 射线衍射（XRD）分析和里特维尔德细化表明，纯荧光粉属于空间群（P21/m (11)），具有双包晶结构。经计算，直接半导体 NaMgLaTeO6 的带隙（Eg）为 2.065 eV。在 388 纳米的激发下，4F9/2→6H13/2 能级跃迁促成了 572 纳米处的最大发射峰。该荧光粉的其他特性包括最佳浓度（x = 5 mol %）、高热稳定性、活化能（Ea = 0.31 eV）和内部量子效率（IQE = 31.44 %）。该荧光粉制备的白光发光二极管（w-LED）的相关色坐标为（0.298，0.311）。由 NaMgLaTeO6:Dy3+ 生成的潜指纹（LFP）的特征可以在不同的表面上清晰地反映出来。总之，NaMgLaTeO6:Dy3+ 荧光粉在 w-LED 生产和 LFP 检测方面具有很大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.