College of Mechanical and Electronic Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China.
Dalton Trans. 2018 Nov 21;47(43):15574-15582. doi: 10.1039/c8dt03740j. Epub 2018 Oct 22.
To facilitate phosphor-converted light-emitting diodes (LEDs) for plant growth, the development of phosphor materials with efficient red or far-red emission is essential. Herein, we report a novel CaSrZnGaO:0.15Mn (CSZG:Mn) phosphor with far-red emission synthesized via the traditional solid-state reaction. The structure, morphology and the effect of dopant concentration on the photoluminescence properties of CSZG:Mn were systematically investigated. These phosphors can efficiently be excited by near-ultraviolet (NUV)/blue LED chips, and exhibit highly efficient red emission in the range of 650-760 nm, which matches well with the absorption band of phytochrome. The as-fabricated LED, comprising the CSZG:Mn phosphor and a 460 nm blue InGaN chip, emits bright blue and red light. Owing to their high quantum efficiency (QE) value (∼75.8%), excellent thermal stability (∼97.9% at 425 K relative to that at RT), non-rare earth materials and mild preparation conditions, the CSZG:Mn phosphors have great potential as far-red emission phosphors in high-power plant growth LEDs.
为了促进用于植物生长的磷光转换发光二极管（LED），开发具有高效红色或远红色发射的磷光材料至关重要。在此，我们通过传统的固态反应报告了一种具有远红色发射的新型 CaSrZnGaO:0.15Mn（CSZG:Mn）磷光体。系统研究了 CSZG:Mn 的结构、形态以及掺杂浓度对光致发光性能的影响。这些荧光粉可以被近紫外（NUV）/蓝色 LED 芯片有效激发，并在 650-760nm 范围内表现出高效的红色发射，与光敏色素的吸收带很好地匹配。所制备的 LED 由 CSZG:Mn 荧光粉和 460nm 蓝色 InGaN 芯片组成，发出明亮的蓝色和红色光。由于其高量子效率（QE）值（约为 75.8%）、优异的热稳定性（相对于室温时在 425K 下为 97.9%）、非稀土材料和温和的制备条件，CSZG:Mn 荧光粉在高功率植物生长 LED 中作为远红色发射荧光粉具有很大的潜力。
