Green-Emitting Perovskite BaTiO3:Ho3+ Phosphors for Solid-State Lighting

IF 2.5 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electronic Materials Pub Date : 2024-06-11 DOI:10.1007/s11664-024-11183-w

Vijay Singh, Aadil Ahmad Bhat, Chaitali M. Mehare, S. J. Dhoble

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Abstract

This study investigates the potential of Ho³⁺ doped BaTiO₃ perovskite phosphor, synthesized via the sol–gel method. X-ray diffraction (XRD) analysis confirmed a hexagonal crystallographic structure (P63/mmc), consistent with JCPDS card no. 82-1175. The shifts in the XRD pattern suggest that the concentration of Ho³⁺ ions influence the structure. Fourier transform infrared (FT-IR) spectroscopy is used to study the vibrational behavior of the synthesized perovskite phosphor. The diffuse reflectance spectra (DRS) presented several bands in the UV–Vis regions due to Ho³⁺ ions. The bandgap for Ho³⁺-doped BaTiO₃ was calculated as 2.8 eV, which aligns with the literature values. This value was derived from fitting the Tauc equation to the absorption coefficient data. Extensive photoluminescence (PL) spectroscopy revealed sharp excitation and emission spectra. The PL spectrum, corresponding to an excitation wavelength of 456 nm, exhibited a dominant green emission at 540 nm that corresponds to the ⁵F₄/⁵S₂ → ⁵I₈ transition, suggesting its suitability for a green-emitting phosphor. Concentration quenching optimization occurred beyond 0.015 mol Ho³⁺ ions. The CIE color coordinates and color purity analysis confirmed the phosphor’s suitability for green-emitting applications. Preliminary results suggest that this research highlights the potential of the phosphor for green light generation and advancing solid-state lighting technology.

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用于固态照明的绿色发光 Perovskite BaTiO3:Ho3+ 荧光粉

本研究考察了溶胶-凝胶法制备的Ho3+掺杂BaTiO3钙钛矿荧光粉的性能。x射线衍射（XRD）分析证实为六方晶体结构（P63/mmc），与JCPDS证号一致。82 - 1175。XRD谱图的变化表明Ho3+离子的浓度对结构有影响。利用傅里叶变换红外光谱（FT-IR）研究了合成的钙钛矿荧光粉的振动行为。由于Ho3+离子的作用，在紫外-可见区出现了多波段的漫反射光谱。计算得到掺Ho3+的BaTiO3的带隙为2.8 eV，与文献值一致。该值是通过对吸收系数数据拟合Tauc方程得出的。广泛的光致发光（PL）光谱显示出尖锐的激发和发射光谱。激发波长为456nm的PL光谱在5F4/5S2→5I8跃迁的540nm处以绿色为主，适合作为绿色发光荧光粉。浓度猝灭优化发生在0.015 mol Ho3+离子以上。CIE颜色坐标和颜色纯度分析证实了该荧光粉适合绿色发光应用。初步结果表明，这项研究突出了荧光粉在绿光产生和推进固态照明技术方面的潜力。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.