Novel reddish-orange emitting BaBPO5:Eu3+ phosphor for n-UV warm white-LEDs: Synthesis and study of structural and spectroscopic investigations

IF 3.1 3区 物理与天体物理 Q2 Engineering Optik Pub Date : 2024-10-30 DOI:10.1016/j.ijleo.2024.172103
T. Chandra Mohan , T. Raghu Raman , K. Venkata Rao , P. Sai Dinesh , Y.C. Ratnakaram
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Abstract

A novel reddish-orange emitting 2Ba2-xO-B2O3-P2O5:xEu3+ (x= 0.04, 0.06, 0.08, 0.10, 0.12 and 0.14 mol%) phosphor with different concentrations of Eu3+ ions were synthesized through high temperature solid-state reaction technique. The crystal structure has been studied by X-ray diffraction technique for all the concentrations of Eu3+ ions. The morphology and elemental analysis of the optimal ∼0.1 mol% concentration was examined by the SEM-EDS images. The functional groups were analysed by the FTIR characterization technique. The thermal properties were studied by the TGA-DSC analysis. The energy band gap of all the samples were analysed by using UV–VIS DRS technique. The photoluminescence properties of BaBPO5:Eu3+ phosphor with different concentrations of Eu3+ ions were investigated at λem = 611 nm and λex = 394 nm. Variation in emission intensity with Eu3+ ion concentrations, phonon side bands, multi-phonon relaxation rate and energy transfer mechanisms were studied. The BaBPO5:Eu3+ phosphors exhibit characteristic emission peaks corresponding to 5D07FJ (J = 0, 1, 2, 3, 4) transitions of Eu3+ ions under n-UV excitation. Among all the transitions, 5D07F1 (593 nm) transition shows higher intensity and asymmetric ratio (R21) for all concentrations of Eu3+ ions were calculated. The lifetimes of 5D0 level of Eu3+ ions in BaBPO5: Eu3+ phosphor were calculated by using fluorescent decay curve analysis. The CIE color coordinates reveal, reddish-orange emission in the low CCT range. These findings imply that BaBPO5: 0.1Eu3+ phosphor is a promising candidate for solid-state lighting applications as well as phosphor-converted warm w-LEDs.
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用于 n-UV 暖白光 LED 的新型橘红色发光 BaBPO5:Eu3+ 荧光粉:结构和光谱的合成与研究
通过高温固态反应技术合成了含有不同浓度 Eu3+ 离子的新型橘红色发光 2Ba2-xO-B2O3-P2O5:xEu3+(x= 0.04、0.06、0.08、0.10、0.12 和 0.14 mol%)荧光粉。通过 X 射线衍射技术研究了所有 Eu3+ 离子浓度的晶体结构。通过扫描电镜-电子显微镜(SEM-EDS)图像对最佳浓度 ∼0.1 mol% 的形貌和元素分析进行了研究。傅立叶变换红外特性技术分析了官能团。热性能通过 TGA-DSC 分析进行了研究。使用 UV-VIS DRS 技术分析了所有样品的能带间隙。在 λem = 611 纳米和 λex = 394 纳米波长下,研究了不同浓度 Eu3+ 离子的 BaBPO5:Eu3+ 荧光粉的光致发光特性。研究了发射强度随 Eu3+ 离子浓度、声子边带、多声子弛豫速率和能量传递机制的变化。在正紫外激发下,BaBPO5:Eu3+荧光粉显示出与 Eu3+ 离子的 5D0 → 7FJ (J = 0、1、2、3、4)跃迁相对应的特征发射峰。在所有跃迁中,5D0 → 7F1(593 nm)跃迁的强度较高,计算得出所有浓度 Eu3+ 离子的不对称比(R21)。通过荧光衰减曲线分析,计算了 BaBPO5: Eu3+ 荧光粉中 Eu3+ 离子 5D0 电平的寿命。CIE 色坐标显示,在低 CCT 范围内,荧光呈橘红色。这些研究结果表明,BaBPO5: 0.1Eu3+ 荧光粉是固态照明应用以及荧光粉转换暖色发光二极管的理想候选材料。
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来源期刊
Optik
Optik 物理-光学
CiteScore
6.90
自引率
12.90%
发文量
1471
审稿时长
46 days
期刊介绍: Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.
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