强绿色发光Ho3+/Yb3+共掺杂Sr2LaF7上转换纳米晶体用于潜在指纹检测

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

Materials Research Bulletin Pub Date : 2025-05-01 DOI:10.1016/j.materresbull.2025.113536

Kapil S. Janbandhu , V.B. Pawade , J.B. Modak

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引用次数: 0

摘要

绿色上转换荧光粉具有强绿色发光、高灵敏度、易被人眼看到的特点，是一种很有前途的无创、高对比度的指纹检测工具。本文报道了用Na2-EDTA共沉淀法合成Ho3+ /Yb3+共掺杂Sr2LaF7 UC纳米晶体。成功地研究了晶相、晶型和粒度、红外光谱、紫外可见光谱、上转换发射性能。进一步研究了高温退火对合成荧光粉晶粒尺寸和UC性能的影响。研究了Sr2LaF7: Ho3+ /Yb3+在980 nm近红外激发下的上转换特性，发现在542 nm处，由于Ho3+离子的（5F4/5S2）→5I8跃迁，呈现出强烈的绿色发光。UC研究表明Yb3+向Ho3+的能量转移成功。基于观测到的发射，讨论了Ho3+和Yb3+离子之间的上转换过程和相应的能量传递机制。CIE显示位于绿色区域的颜色坐标，颜色纯度高。因此，Sr2LaF7: Ho3+ /Yb3+强绿色UC纳米晶体在潜在指纹检测中具有潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Intense green emitting Ho3+/Yb3+ Co-doped Sr2LaF7 upconversion nanocrystals for latent fingerprint detection

查看原文本刊更多论文

Intense green emitting Ho3+/Yb3+ Co-doped Sr2LaF7 upconversion nanocrystals for latent fingerprint detection

Green upconversion phosphor has emerged as a promising tool for non-invasive, high-contrast latent fingerprint detection, owing to its strong green emission, which is highly sensitive and easily visible to the human eye. This work reported the Series of Ho³⁺ /Yb³⁺ co-doped Sr₂LaF₇ UC nanocrystals were synthesized by the co-precipitation method using Na₂-EDTA. Crystalline phase, crystallite and particle size, FTIR, UV–visible spectroscopy, upconversion emission properties were successfully investigated. Further studied the effect of high temperature annealing on crystal size and UC properties of the synthesized phosphor. The upconversion properties of Sr₂LaF₇ : Ho³⁺ /Yb³⁺studied under 980 nm near infra-red (NIR) excitation, which exhibits the intense green emission at 542 nm due to (⁵F₄/⁵S₂) → ⁵I₈ transition of Ho³⁺ ions. UC study shows successful energy transfer from Yb³⁺ to Ho³⁺. Based on the observed emission, the upconversion process and corresponding energy transfer mechanism between Ho³⁺ and Yb³⁺ ions were also discussed. CIE reveals the color coordinates located in green region with high color purity. Hence, Sr₂LaF₇: Ho³⁺ /Yb³⁺ intense green UC nanocrystals find potential scope in latent fingerprint detection.

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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.