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A novel efficient Mn4+-activated Ba2YTaO6 far-red emitting phosphor for plant cultivation LEDs: Preparation and photoluminescence properties
Journal of Luminescence ( IF 3.6 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jlumin.2020.117621
Wei Li , Nan Ma , Qi Sun , Shaoying Wang , Zongjie Zhang , Balaji Devakumar , Xiaoyong Huang

Abstract Novel efficient Ba2YTaO6:Mn4+ (BYT:Mn4+) far-red emitting double-perovskite phosphors for plant cultivation LEDs were reported in this article. These phosphors were successfully synthesized via a traditional high-temperature solid-state reaction method, and their crystal structure, luminescence properties, fluorescence decay lifetimes, Commission Internationale de l'Eclairage (CIE) chromaticity coordinates, internal quantum efficiency, and thermal stability have been systematically investigated. XRD Rietveld refinement demonstrated that the BYT:Mn4+ compound crystallized into cubic crystal system with Fm 3 ‾ m space group, and the lattice parameter were a = b = c = 8.445 (7) A, α = β = γ = 90°, and V = 602.231 (10) A3. Interestingly, the obtained samples showed an intense far-red emission band centered at 690 nm under excitation of 360 nm, which matched well with the absorption band of phytochrome PFR. In BYT:Mn4+ phosphors, the Mn4+ ions occupied the TaO6 octahedron by replacing the Ta5+ site, and the optimal doping concentration of Mn4+ ions was determined to be 0.4 mol%. The CIE chromaticity coordinates and internal quantum efficiency of BYT:0.4%Mn4+ phosphors were (0.7283, 0.2717) and 41.5%, respectively. In addition, when the temperature reached at 423 K, the emission intensity of BYT:0.4%Mn4+ phosphors remained 37% of that at 303 K. Therefore, all of these investigations demonstrated that BYT:Mn4+ phosphors could be used as potential far-red emitting phosphors for plants cultivation LEDs.

中文翻译:

一种用于植物栽培 LED 的新型高效 Mn4+ 激活 Ba2YTaO6 远红光荧光粉:制备和光致发光特性

摘要 本文报道了用于植物栽培 LED 的新型高效 Ba2YTaO6:Mn4+ (BYT:Mn4+) 远红光双钙钛矿荧光粉。这些荧光粉通过传统的高温固相反应方法成功合成,其晶体结构、发光特性、荧光衰变寿命、国际照明委员会(CIE)色度坐标、内量子效率和热稳定性均已得到验证。系统地调查。XRD Rietveld 精修表明 BYT:Mn4+ 化合物结晶成立方晶系,具有 Fm 3 ‾ m 空间群,晶格参数为 a = b = c = 8.445 (7) A,α = β = γ = 90°,和V = 602.231 (10) A3。有趣的是,所得样品在 360 nm 激发下显示出以 690 nm 为中心的强烈远红发射带,与光敏色素 PFR 的吸收带匹配良好。在 BYT:Mn4+ 荧光粉中,Mn4+ 离子通过取代 Ta5+ 位点占据 TaO6 八面体,Mn4+ 离子的最佳掺杂浓度确定为 0.4 mol%。BYT:0.4%Mn4+ 荧光粉的 CIE 色度坐标和内量子效率分别为 (0.7283, 0.2717) 和 41.5%。此外,当温度达到 423 K 时,BYT:0.4%Mn4+ 荧光粉的发射强度仍为 303 K 时的 37%。因此,所有这些研究都表明 BYT:Mn4+ 荧光粉可作为潜在的远红光用于植物栽培 LED 的荧光粉。Mn4+ 荧光粉,Mn4+ 离子通过取代Ta5+ 位点占据TaO6 八面体,Mn4+ 离子的最佳掺杂浓度确定为0.4 mol%。BYT:0.4%Mn4+ 荧光粉的 CIE 色度坐标和内量子效率分别为 (0.7283, 0.2717) 和 41.5%。此外,当温度达到 423 K 时,BYT:0.4%Mn4+ 荧光粉的发射强度仍为 303 K 时的 37%。因此,所有这些研究都表明 BYT:Mn4+ 荧光粉可作为潜在的远红光用于植物栽培 LED 的荧光粉。Mn4+ 荧光粉,Mn4+ 离子通过取代Ta5+ 位点占据TaO6 八面体,Mn4+ 离子的最佳掺杂浓度确定为0.4 mol%。BYT:0.4%Mn4+ 荧光粉的 CIE 色度坐标和内量子效率分别为 (0.7283, 0.2717) 和 41.5%。此外,当温度达到 423 K 时,BYT:0.4%Mn4+ 荧光粉的发射强度仍为 303 K 时的 37%。因此,所有这些研究都表明 BYT:Mn4+ 荧光粉可作为潜在的远红光用于植物栽培 LED 的荧光粉。0.2717) 和 41.5%。此外,当温度达到 423 K 时,BYT:0.4%Mn4+ 荧光粉的发射强度仍为 303 K 时的 37%。因此,所有这些研究都表明 BYT:Mn4+ 荧光粉可作为潜在的远红光用于植物栽培 LED 的荧光粉。0.2717) 和 41.5%。此外,当温度达到 423 K 时,BYT:0.4%Mn4+ 荧光粉的发射强度仍为 303 K 时的 37%。因此,所有这些研究都表明 BYT:Mn4+ 荧光粉可作为潜在的远红光用于植物栽培 LED 的荧光粉。
更新日期:2020-12-01
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