Investigations on photoluminescence properties, quantum and Judd-Ofelt analysis of novel NaSrY(BO3)2:Eu3+ phosphor for lighting applications

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-05-21 DOI:10.1016/j.materresbull.2025.113562

C.M. Nandanwar , A.N. Yerpude , M.A. Patwardhan , N.S. Kokode , R.L. Kohale

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Abstract

The Eu³⁺-doped NaSrY(BO₃)₂ phosphor was synthesized using a combustion technique, and its photoluminescence properties were systematically investigated through decay time measurements, color purity analysis, X-ray diffraction (XRD), quantum efficiency determination, Judd-Ofelt analysis, and near-ultraviolet (n-UV) excitation studies. Upon excitation at 395 nm, the phosphor exhibited intense emission peaks at 595 nm, 615 nm, and 654 nm, corresponding to the characteristic transitions of Eu³⁺ ions. Judd-Ofelt analysis of the emission spectra revealed the intensity parameter trend Ω₂ > Ω₄, indicating a strong electric dipole contribution and a highly asymmetric local environment around Eu³⁺ ions. The radiative properties, including radiative lifetime (τ_r), experimental lifetime (τ), and quantum efficiency (η_QE), were examined to assess the luminescence performance. The analysis of effective bandwidth (Δλ_eff), absorption cross-section (σ_e), and their associated parameters (σ_e × Δλ_eff and σ_e × τ) further provided insights into the optical behavior. The phosphor demonstrated a high quantum efficiency of 94 %, with a photoluminescence decay time of 2.0108 ms for the 1 mol % Eu³⁺-doped sample, confirming efficient energy transfer and emission stability.Furthermore, the CIE chromaticity coordinates confirmed the excellent color purity of the synthesized phosphor. The strong radiative characteristics associated with Ω₂ and Ω₄ intensity parameters reinforce the suitability of Eu³⁺-doped NaSrY(BO₃)₂ for applications in display technologies and solid-state lighting.

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新型照明用NaSrY(BO3)2:Eu3+荧光粉的光致发光特性、量子和Judd-Ofelt分析

采用燃烧技术合成了Eu³⁺掺杂NaSrY（BO₃）2荧光粉，并通过衰减时间测量、色纯度分析、x射线衍射（XRD）、量子效率测定、Judd-Ofelt分析和近紫外（n-UV）激发研究系统地研究了其光致发光性能。在395 nm处激发后，荧光粉在595 nm、615 nm和654nm处表现出强烈的发射峰，与Eu³⁺的特征跃迁相对应。发射光谱的Judd-Ofelt分析揭示了强度参数趋势Ω₂>；Ω₄，表明Eu³+离子周围有很强的电偶极子贡献和高度不对称的局部环境。研究了辐射寿命（τr）、实验寿命（τ）和量子效率（ηQE）等辐射特性来评价其发光性能。有效带宽（Δλeff）、吸收截面（σe）及其相关参数（σe × Δλeff和σe × τ）的分析进一步揭示了其光学特性。该荧光粉的量子效率高达94%，1 mol % Eu³+掺杂样品的光致发光衰减时间为2.0108 ms，证实了高效的能量转移和发射稳定性。此外，CIE色度坐标证实了合成的荧光粉具有优异的色纯度。与Ω₂和Ω₄强度参数相关的强辐射特性增强了Eu³⁺掺杂NaSrY（BO₃）₂在显示技术和固态照明中的适用性。

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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.