Orange-Red-Emitting Ba2YAlO5:Sm3+ Phosphors with High Thermal Stability for Preparation of w-LEDs

IF 2.2 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Leilei Wang, Haiyan Jiang
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引用次数: 0

Abstract

A series of orange-red-emitting phosphors, Ba2Y1−xSmxAlO5 (x = 1 mol.%, 2 mol.%, 5 mol.%, 10 mol.%, 15 mol.%, 20 mol.%, 25 mol.%, and 30 mol.%), were successfully synthesized using a high-temperature solid-state method at 1400°C, with Sm3+ serving as the activator. The crystallinity of the samples was confirmed in the space group P21/c (14). Efficient excitation was observed in the Ba2YAlO5:xSm3+ phosphors when exposed to 405 nm irradiation. Upon excitation at 405 nm, the synthesized Ba2YAlO5:xSm3+ phosphors displayed three distinctive peaks, which corresponded to the transitions of Sm3+ at 4G5/26HJ (J = 5/2, 7/2, and 9/2). Optimal luminescence properties were achieved at a Sm3+ concentration of 2 mol.%. The phenomenon of concentration quenching was elucidated through the application of dipole–dipole interaction theory. The quenching temperature of Ba2YAlO5:0.10Sm3+ exceeded 480 K. The CIE chromaticity coordinates of Ba2YAlO5:xSm3+ closely align with the recognized standard red defined by the National Television System Committee (NTSC). This conformity underscores the potential of Ba2YAlO5:xSm3+ phosphors for applications demanding precise color reproduction, as required in advanced display technologies and lighting systems.

Abstract Image

具有高热稳定性的橘红色发光 Ba2YAlO5:Sm3+ 磷光体用于制备 w-LED
以 Sm3+ 为活化剂,采用高温固态法在 1400°C 下成功合成了一系列橘红色发光荧光粉 Ba2Y1-xSmxAlO5(x = 1 mol.%、2 mol.%、5 mol.%、10 mol.%、15 mol.%、20 mol.%、25 mol.% 和 30 mol.%)。样品的结晶度被确认为空间群 P21/c (14)。当 Ba2YAlO5:xSm3+ 磷光体受到 405 纳米波长的照射时,可以观察到有效的激发。在 405 纳米波长下激发时,合成的 Ba2YAlO5:xSm3+ 磷光体显示出三个明显的峰值,分别对应于 Sm3+ 在 4G5/2-6HJ (J = 5/2、7/2 和 9/2)处的跃迁。当 Sm3+ 浓度为 2 摩尔%时,发光特性达到最佳。应用偶极-偶极相互作用理论阐明了浓度淬灭现象。Ba2YAlO5:0.10Sm3+ 的淬火温度超过 480 K。Ba2YAlO5:xSm3+ 的 CIE 色度坐标与美国国家电视系统委员会(NTSC)定义的公认标准红色非常一致。这种一致性凸显了 Ba2YAlO5:xSm3+ 荧光粉在要求精确色彩再现的应用中的潜力,而这正是先进显示技术和照明系统所需要的。
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来源期刊
Journal of Electronic Materials
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.
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