Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, Guizhou, China.
Luminescence. 2023 Jun;38(6):692-701. doi: 10.1002/bio.4497. Epub 2023 Apr 25.
A novel far-red emitting phosphor Sr MgWO : Mn was fabricated using high-temperature solid-state reaction. X-ray diffraction patterns, scanning electron microscopy images, and photoluminescence excitation and photoluminescence spectra for this phosphor were analyzed in detail. The analysis revealed that its emission ranged from 600 to 800 nm and peaked at 699 nm, which was attributed to the E → A transition of Mn under 314 nm excitation. Moreover, we introduced rare-earth Yb ions into the Sr MgWO :Mn to improve its far-red emitting intensity. The photoluminescence (PL) intensity of the Yb co-doped phosphor was three times higher than that of the single-doped phosphor. Therefore charge compensation is an efficient approach to improving PL intensity. The phosphor emitted a far-red light that resembled the pigments essential for plant growth in terms of the absorption spectrum. Therefore, the obtained phosphor, Sr MgWO :0.006Mn ,0.2Yb , had the potential to be a new type of far-red luminescent powder for indoor plant growth LEDs.
采用高温固相法制备了一种新型的远红色发射荧光粉 SrMgWO:Mn。详细分析了该荧光粉的 X 射线衍射图谱、扫描电子显微镜图像以及光致发光激发和光致发光光谱。分析表明，其发射范围为 600 至 800nm，峰值位于 699nm，这归因于 314nm 激发下 Mn 的 E→A 跃迁。此外，我们将稀土 Yb 离子引入 SrMgWO:Mn 中以提高其远红色发射强度。Yb 共掺杂荧光粉的光致发光（PL）强度是单掺杂荧光粉的三倍。因此，电荷补偿是提高 PL 强度的有效方法。该荧光粉发射的远红光在吸收光谱上与植物生长所必需的色素相似。因此，所获得的 SrMgWO:0.006Mn,0.2Yb 荧光粉有可能成为一种新型的用于室内植物生长 LED 的远红色发光粉末。
