摘要
亚微米尺寸K_(2)SiF_(6)∶Mn^(4+)荧光粉被认为是Micro-LED显示领域的变革性技术,但是小粒径K_(2)SiF_(6)∶Mn^(4+)荧光粉的合成技术不成熟,难以实现亚微米尺度下的高效发光。因此,本文报道了一种亚微米级K_(2)SiF_(6)∶Mn^(4+)荧光粉的沉淀合成新方法。经荧光光谱分析,该荧光粉在450 nm蓝光激发下展现出典型的Mn^(4+)红色发光,其内量子效率高达94.9%。经扫描电子显微镜(SEM)观察,合成的荧光粉粒径分布在150~450 nm范围。该荧光粉具备良好的热猝灭性能,在443 K可保持室温发光强度的102%。将绿色荧光粉β-sialon∶Eu^(2+)和K_(2)SiF_(6)∶Mn^(4+)混合涂覆在蓝光芯片上制成白光LED,其色域覆盖范围达到133%NTSC,在驱动电流从10 mA增加到120 mA的情况下,色温波动~10%、显色指数波动~2%,总体性能保持稳定。本文将为亚微米尺寸K_(2)SiF_(6)∶Mn^(4+)荧光粉的合成提供新的方法,以促进Micro-LED显示技术的进一步发展。
Sub-micrometer-sized K_(2)SiF_(6)∶Mn^(4+)phosphors hold transformative potential in the Micro-LED display in-dustry.However,the synthesis of small-diameter K_(2)SiF_(6)∶Mn^(4+)phosphors remains a challenge due to immature tech-nology,hindering efficient luminescence at the sub-micrometer scale.This paper introduces a novel method for syn-thesizing sub-micrometer-sized K_(2)SiF_(6)∶Mn^(4+)phosphors via precipitation.Fluorescence spectroscopy analysis reveals that the phosphor displays typical Mn^(4+)red emission under 450 nm blue light excitation,with an internal quantum ef-ficiency reaching 94.9%.SEM observation indicates that the synthesized phosphor particles exhibit a size distribu-tion between 150 nm and 450 nm.The phosphor demonstrates excellent thermal quenching performance,maintain-ing 102% of the initial luminescence intensity at 443 K.A white LED was fabricated by combining green phosphorβ-sialon∶Eu^(2+)and K_(2)SiF_(6)∶Mn^(4+)and applying it to a blue chip.The color gamut coverage achieved 133%NTSC,and the color temperature and color rendering index fluctuated by approximately 10% and 2% respectively when the driv-ing current increased from 10 mA to 120 mA,indicating overall stable performance.This paper offers fresh insights into the synthesis of sub-micrometer-sized K_(2)SiF_(6)∶Mn^(4+)phosphors,contributing to the advancement of Micro-LED display technology.
作者
张鑫鑫
宋建宇
雷云龙
沈龙海
张亮亮
ZHANG Xinxin;SONG Jianyu;LEI Yunlong;SHEN Longhai;ZHANG Liangliang(School of Science,Shenyang Ligong University,Shenyang 110159,China;State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2024年第1期94-102,共9页
Chinese Journal of Luminescence
基金
国家自然科学基金(U22A20139,11974346,12074373,12074374,12274304,52072361,52102192)
国家重点研发计划(2021YFB3502701)
中国科学院青年创新促进会(2020222)
吉林省自然科学基金(SKL202302024,20220101208JC,20230101123JC)
吉林省重点研发项目(20210201024GX)
长春市科技规划项目(21ZGY05)
中国科学院透明光功能无机材料实验室开放课题基金资助项目
安徽省重点科技项目(2021e03020007)。
