Microwave-assisted fast synthesis and red-emitting properties of a borotellurate-based phosphor with excellent thermostability

• Published in: Journal of rare earths 2024-06, Vol.42 (6), p.1036-1045
• Main Authors: Xiang, Yuefei, Li, Hong, Zhang, Hongzhi, Yang, Lin, Liao, Canyuan, Yang, Tongsheng, Li, Junpeng, Guo, Zewen, Zhu, Jing
• Format: Article
• Language: English
• Subjects: Borotellurate; Microwave-assisted synthesis; Rare earths; Red-emitting; Samarium; Thermal stability
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/j.jre.2023.03.012

At present, with the increasing application needs of phosphor-converted white light-emitting diode (w-LED), the synthetic efficiency and thermal stability of phosphor become urgent problems. Herein, this research reports a microwave-assisted fast synthesis approach to obtain a Sm3+-activated borotellurate Na2Y2TeO4(BO3)2 (NYTB) red phosphor with high crystallinity, excellent thermostability, and low chromaticity shift. For the NYTB-based phosphor, in contrast to the conventional solid-state synthesis, the microwave-assisted synthesis method involves lower synthesis temperature and shorter processing time. Additionally, the concentration quenching mechanism was determined. The w-LED device packaged with the studied phosphor exhibits a near-standard white light with proper CCT and high Ra parameters. [Display omitted] A microwave-assisted fast synthesis approach was used to synthesize the borotellurate-based Na2Y2TeO4(BO3)2:Sm3+ red phosphor with high crystallinity, excellent thermostability, and low chromaticity shift. The red phosphor demonstrates potential solid-state lighting applications. •A microwave-assisted fast synthesis is used to construct a Na2Y2TeO4(BO3)2:Sm3+ phosphor.•Na2Y2TeO4(BO3)2:Sm3+ with high CP and suitable IQE exhibits high thermal stability.•The fabricated w-LED device exhibits proper CCT and high Ra.