荧光粉
光致发光
远红色
热稳定性
光敏色素
材料科学
分析化学(期刊)
吸收光谱法
发射光谱
猝灭(荧光)
化学
红灯
光电子学
谱线
光学
荧光
植物
物理
有机化学
色谱法
天文
生物
作者
Zhongfa Li,Zihan Chen,Wenjun Zhang,Chengyue Xin,Xue Wen,Cong Ding
标识
DOI:10.1016/j.jallcom.2023.171333
摘要
Far-red phosphors with higher thermal stability and exhibit excellent spectral compatibility with the far-red light phytochrome (PFR) absorption spectrum. They are currently a research hotspot and widely applied in plant growth lamps. In this study, we have prepared a Mn4+-activated Sr2ScNbO6 far-red phosphor by using the high temperature solid phase method in air. The strongest excitation center of the Sr2ScNbO6: Mn4+ phosphor was located at 365 nm. Due to the 2Eg→4A2 g transition, this phosphor generates strong deep-red light at 703 nm, which significantly overlaps with the absorption spectrum of plant phytochrome PFR. The variable temperature photoluminescence (PL) emission spectra from 303 K to 503 K confirmed this phosphor possesses relatively good thermal stability. In addition, the concentration quenching effect and the thermal quenching mechanism are studied in detail. The results demonstrate that Sr2ScNbO6: 0.4 % Mn4+ phosphor provides a novel choice for the far-red phosphor required for short-day plant cultivation.
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