荧光粉
显色指数
白光
LED灯
热稳定性
发光二极管
材料科学
二极管
色温
光电子学
渲染(计算机图形)
白炽灯
高颜色
光学
化学
矿物学
计算机图形学(图像)
计算机科学
物理
有机化学
图像(数学)
人工智能
彩色图像
图像处理
作者
Wei Cui,Jie Zhang,Zan Sun,Jingyu Ran,Shuo Li,S. H. Zhu,C. Jiang,Yan Wen,Xiangqian Ran
标识
DOI:10.1016/j.jallcom.2024.174428
摘要
To enhance the luminous efficiency of white LEDs and further advance the application of artificial light in controlling plant growth, it is imperative to develop a red phosphor with high luminescence intensity and excellent thermal stability. Our research team has successfully synthesized a Sm3+-activated, high-temperature-resistant Na5Y(MoO4)4 red phosphor through the solid-phase method. Utilizing X-ray diffraction and X-ray photoelectron spectroscopy, we confirmed the successful doping of Sm3+ ions into the Na5Y(MoO4)4 matrix. The synthesized phosphors demonstrate a robust red emission at 645 nm, characterized by an optimal doping concentration of 0.06 and a quantum efficiency of 38.14%. Remarkably, the emission peak intensity and integral area of the sample at 423 K retain 83.24% of their value at room temperature, showcasing exceptional thermal stability. The potential of the prepared phosphors in solid-state lighting and in promoting plant growth was confirmed by encapsulating them within LED devices. The emission spectrum of the encapsulated red LED closely aligns with the absorption spectra of plant chlorophyll a/b and the photosensitive pigment PR, indicating its suitability for enhancing photosynthesis. Additionally, the encapsulated white LED emits a brilliant white light, achieving a high color rendering index with values of Ra (91.7) and R9 (40), significantly outperforming the commercial phosphor standards of 80 (Ra) and 15 (R9). The test results demonstrate the synthesized red phosphor has a promising application in white LED illumination and plant growth enhancement.
科研通智能强力驱动
Strongly Powered by AbleSci AI