Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 32
·12451-12457
·
IF 5.7
Chaowei Yang,Xikun Zou,Mengqi Lyu,Mingkai Wei,Ziyi Wang,Xiaoyu Shuang,Xuejie Zhang,Bin Dong,Xinming Li,Yan Cong,Mingtao Zheng,Maxim S. Molokeev,Bingfu Lei
Far-red light plays a crucial role in plant growth, development, and flowering as a light signal. However, efficiently obtaining far-red light that well-matches the plant-photosensitive pigment Pfr remains a significant challenge in indoor agriculture. In this study, a far-red phosphor, BaGd2Al2Ga2GeO12:Cr3+(BGAGG:Cr3+), was successfully synthesized, using a high-temperature solid-phase method. Under 450 nm excitation, its emission maximum is at 712 nm with a full width at half maximum (FWHM) of 92 nm, which well-matches with Pfr. Combined with a blue LED chip, this phosphor was used to create a pc-LED device for bok choy and Micro-Tom cultivation experiments. Under the irradiation of far-red light, the biomass of bok choy increased by 39%, and the flowering and fruiting of Micro-Tom was promoted, demonstrating its potential in plant lighting applications.
研究领域:
植物学
·
材料科学
·
农业科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 9
·3272-3279
·
IF 5.7
Sha Ouyang,Jiamai Yin,Liujuan Su,Maohai Yao,Guichao Wang,Jiayi Yang,Maxim S. Molokeev,Zhi Zhou,Sijin Zhang,Mao Xia
Phytochrome PFR plays a key role in plant photomorphogenesis, and its perception of far-red light is essential, but how to obtain an efficient far-red phosphor to achieve accurate light filling remains a huge challenge. In this study, Gd1−y−zAl3−x(BO3)4:xCr3+,yLu3+,zSm3+ (GAB:xCr3+,yLu3+,zSm3+) series phosphors were synthesized by a high-temperature solid-state method. By doping Lu3+, the emission intensity of Cr3+ could increase as high as 20%. With the introduction of Sm3+, the emission intensity of Cr3+ was further increased by 29%. Particularly, the emission spectra can be tuned by varying the concentration ratio of Sm3+ and Cr3+, more suitable for the absorption spectrum of PFR. Moreover, the internal quantum yield and external quantum yield of GL0.1AB:0.03Cr3+ and GL0.1AB:0.03Cr3+,0.003Sm3+ were 83.1% and 24.7% and 78.1% and 26.3%, respectively. There were high anti-thermal quenching properties in the prepared phosphors at 423 K, with 107.6% (GAB:0.03Cr3+), 103.1% (GL0.1AB:0.03Cr3+), and 102.7% (GL0.1AB:0.003Sm3+,0.03Cr3+). Finally, the phosphors were made into pc-LED devices, which can realize the adjustable orange-red and far-red luminescence and meet the needs of plant lighting applications. In the light-regulated plant growth experiment, compared with the control group, far-red light promoted root growth in plants, confirming the application potential of the prepared phosphors in indoor plant cultivation.
研究领域:
植物学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Chaowei Yang,Dongwei Zheng,Xikun Zou,Xiangyi Dai,Baoling Tang,Maxim S. Molokeev,Xuejie Zhang,Haoran Zhang,Yingliang Liu,Bingfu Lei
Far-red (FR) region (beyond 700 nm) lighting sources possess special potential for plant lighting. However, it remains a challenge to obtain high-performance Cr 3+ -doped FR phosphors. This study developed a FR phosphor, Ca 1.8 Mg 1.2 Al 2 Ge 3 O 12 :Cr 3+ (CMAGG: Cr 3+ ), using the cation substitution strategy. Under 438 nm blue light excitation, the phosphors display FR emission centered at 720 nm with a full width at half maximum (FWHM) of 91 nm. Benefit from the favorable match with the FR phytochrome (P fr ), the phosphor is combined with InGaN blue light chips to create a FR phosphor-converted light-emitting diode (pc-LED), which is used in Italian lettuce growth experiments and it results shown in a 15% increase in fresh weight and a 6.5% increase in dry weight. Notably, supplemental FR light modulated its growth morphology. The results of this study will be useful for further research on novel Cr 3+ -doped FR phosphors to meet the precise spectral requirements for plant growth.
研究领域:
植物学
·
材料科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Jiajie Pan,Youjie Hua,Zhanhao Fan,Hongping Ma
Far-red light plays a crucial role in the field of plant lighting. Herein, a novel far-red phosphor BaAl 2 Si 3 O 4 N 4 : Sm 2+ , which can be effectively excited by blue light, was successfully prepared by high-temperature solid-state reaction. The PL spectrum show a broadband emission range from 600 nm to 950 nm (FWHM = 120 nm), which is well matched with the absorption of P FR in plant. In BaAl 2 Si 3 O 4 N 4 : Sm 2+ , the Ba 2+ are coordinated with three N and six O atoms. When the rare earth ion of Sm 2+ was doped into the host lattice , Ba 2+ was partially replaced by Sm 2+ . The low temperature PL spectra at 8–80 K were studied in detail. It was found that the PL spectra at low temperature were composed of some sharp lines and broadband superposition, which corresponding to the 5 D 0 - 7 F J (J = 0–4) energy level transition of Sm 2+ . It is shown that the broadband emission of the phosphor was caused by the broadening of the 4f 5 5 d 1 energy level due to the strong crystal field effect. The thermal stability analysis showed that the luminescence intensity of BaAl 2 Si 3 O 4 N 4 : Sm 2+ at 150 °C still maintains 62.7 % of that at room temperature , showing excellent thermal stability. All results indicate that BaAl 2 Si 3 O 4 N 4 : Sm 2+ phosphor has important potential applications in the field of plant lighting.
研究领域:
材料科学
·
光电子学
·
农业光学
·
无机化学
·
发光材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）