School of Information Technology and Digital Economics (SITDE), National Economics University (NEU), Hanoi, Vietnam.
Department of Chemistry, Hanoi Pedagogical University 2, Phuc Yen, Vinh Phuc, Vietnam.
Luminescence. 2024 Aug;39(8):e4851. doi: 10.1002/bio.4851.
Recently, deep-red-emitting phosphors that can be excited by ultraviolet (UV) and near-ultraviolet (NUV) light have been extensively investigated for plant growth LED applications. However, due to the harmful effects of these high-energy rays on plants, violet- or blue-excited deep-red-emitting phosphors are considered a more appropriate solution. In this work, SrAlO:Cr phosphors were synthesized using a simple solid-state reaction, revealing a strikingly sharp deep-red emission band centered at 694 nm and effective excitation by violet light. The optimal SrAlO:1.0%Cr phosphor, annealed at 1500°C, exhibits an extended lifetime of 0.549 ms, an energy activation level of 0.239 eV, a good quantum efficiency (QE) of 36.2%, and superior color purity at 100%. Further, an LED prototype with a precise absorption spectrum for far-red phytochrome (P) has been demonstrated. These results indicate that the synthesized SrAlO:1.0%Cr phosphors could be used as a promising deep-red-emitting phosphor for plant growth LED.
近年来，能被紫外（UV）和近紫外（NUV）光激发的深红光发射荧光粉在植物生长 LED 应用中得到了广泛的研究。然而，由于这些高能射线对植物的有害影响，人们认为使用紫光或蓝光激发的深红光发射荧光粉是更为合适的解决方案。在这项工作中，我们使用简单的固态反应合成了 SrAlO:Cr 荧光粉，其呈现出显著尖锐的深红光发射带，中心位于 694nm，并能有效被紫光激发。经过 1500°C 退火的最佳 SrAlO:1.0%Cr 荧光粉具有 0.549ms 的延长寿命、0.239eV 的能量激活水平、36.2%的良好量子效率（QE）和 100%的优异色纯度。此外，还展示了一种具有远红光敏色素（P）精确吸收光谱的 LED 原型。这些结果表明，合成的 SrAlO:1.0%Cr 荧光粉可用作植物生长 LED 的有前途的深红光发射荧光粉。
