{"title":"Orange-Red-Emitting Ba2YAlO5:Sm3+ Phosphors with High Thermal Stability for Preparation of w-LEDs","authors":"Leilei Wang, Haiyan Jiang","doi":"10.1007/s11664-024-11395-0","DOIUrl":null,"url":null,"abstract":"<p>A series of orange-red-emitting phosphors, Ba<sub>2</sub>Y<sub>1−<i>x</i></sub>Sm<sub><i>x</i></sub>AlO<sub>5</sub> (<i>x</i> = 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 Sm<sup>3+</sup> serving as the activator. The crystallinity of the samples was confirmed in the space group <i>P</i>2<sub>1</sub>/c (14). Efficient excitation was observed in the Ba<sub>2</sub>YAlO<sub>5</sub>:<i>x</i>Sm<sup>3+</sup> phosphors when exposed to 405 nm irradiation. Upon excitation at 405 nm, the synthesized Ba<sub>2</sub>YAlO<sub>5</sub>:<i>x</i>Sm<sup>3+</sup> phosphors displayed three distinctive peaks, which corresponded to the transitions of Sm<sup>3+</sup> at <sup>4</sup>G<sub>5/2</sub>–<sup>6</sup>H<sub><i>J</i></sub> (<i>J</i> = 5/2, 7/2, and 9/2). Optimal luminescence properties were achieved at a Sm<sup>3+</sup> concentration of 2 mol.%. The phenomenon of concentration quenching was elucidated through the application of dipole–dipole interaction theory. The quenching temperature of Ba<sub>2</sub>YAlO<sub>5</sub>:0.10Sm<sup>3+</sup> exceeded 480 K. The CIE chromaticity coordinates of Ba<sub>2</sub>YAlO<sub>5</sub>:<i>x</i>Sm<sup>3+</sup> closely align with the recognized standard red defined by the National Television System Committee (NTSC). This conformity underscores the potential of Ba<sub>2</sub>YAlO<sub>5</sub>:<i>x</i>Sm<sup>3+</sup> phosphors for applications demanding precise color reproduction, as required in advanced display technologies and lighting systems.</p>","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electronic Materials","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s11664-024-11395-0","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
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 4G5/2–6HJ (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.
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.