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    A highly efficient and suitable spectral profile Cr3+-doped garnet near-infrared emitting phosphor for regulating photomorphogenesis of plants / X. Zou, X. Wang, H. Zhang [et al.] // Chem. Eng. J. - 2022. - Vol. 428. - Ст. 132003, DOI 10.1016/j.cej.2021.132003. - Cited References: 46. - The work was supported from the National Natural Science Foundations of China (Nos. 21671070, 51802101), the Guangdong Basic and Applied Basic Research Foundation (No. 2021A1515012613), the Guangdong Provincial Science & Technology Project (Nos. 2020A1414010046, 2021A0505050006), the Guangzhou Science & Technology Project (No. 202007020005), the Natural Science Foundation of Guangdong Province (No. 2018A030310217), the Project of GDUPS (2018) for Prof. Bingfu LEI, and the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (Nos. 2021KJ131 , 2021KJ122) . - ISSN 1385-8947
   Перевод заглавия: Высокоэффективный и подходящий спектральный профиль гранатового люминофора ближнего инфракрасного диапазона, легированного Cr3+, для регулирования фотоморфогенеза растений
Кл.слова (ненормированные):
Cr3+-doped phosphor -- NIR pc-LED -- Photomorphogenesis -- Plant growth
Аннотация: Far-red/phytochrome (PFR) plays a key role in photomorphogenesis of plants. However, how to obtain a near-infrared (NIR) emitting phosphor with high external quantum efficiency (EQE), suitable spectral profile, and low thermal quenching remains a huge challenge. Herein, a NIR phosphor, Gd2.4Lu0.6Ga4AlO12:Cr3+,H3BO3 (GLGA:Cr3+) was developed via regulating the crystal field environment and adding fluxes, which exhibits a peak maximum at 728 nm with a relatively narrow full-width at half maximum (FWHM) of 107 nm, matching well with the absorption band of PFR. Upon 450 nm excitation, the internal quantum efficiency (IQE) and EQE of the optimal phosphor are 90.3% and 32.0%, respectively. At 423 K, the integrated emission intensity of the investigated phosphor is about 75% of that at room temperature. Benefiting from the excellent optical performance, a NIR phosphor-converted light-emitting diode (pc-LED) was fabricated, which shows a NIR output power of 505.99 mW and photoelectric conversion efficiency of 11.24% at 300 mA. Moreover, plant growth experiments demonstrate that the biomass of pea seedlings is increased by 67.72% under supplementary NIR light irradiation. The findings of this research will motivate further research on new Cr3+-doped NIR phosphors for regulating photomorphogenesis of plants.

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Держатели документа:
Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangdong, Guangzhou, 510642, China
Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong, Maoming 525100, China
Department of Physics, Georgia Southern University, Statesboro, GA 30460, United States
College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Zou, X.; Wang, X.; Zhang, H.; Kang, Y.; Yang, X.; Zhang, X.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lei, B.
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Highly-efficiency far-red emission in Cr3+ activated Ca1.8Mg1.2Al2Ge3O12 toward plant precise lighting / Ch. Yang, D. Zheng, X. Zou [et al.] // Adv. Opt. Mater. - 2024. - Ст. 2303235, DOI 10.1002/adom.202303235. - Cited References: 48. - The work was supported by the National Natural Science Foundations of China (No. 12274144), the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (No. 2023KJ122), the Key Realm R&D Program of Guangdong Province (No. 2021B0707010003), the Guangdong Provincial Science and Technology Project (No. 2022A1515010229), and the Project of GDUPS (2018) for Prof. Bingfu LEI . - Article in press. - ISSN 2195-1071
Кл.слова (ненормированные):
cationic substitution -- Cr3+-doped phosphor -- far-red emission -- plant lighting
Аннотация: Far-red (FR) region (beyond 700 nm) lighting sources possess special potential for plant lighting. However, it remains a challenge to obtain high-performance Cr3+-doped FR phosphors. This study developed a FR phosphor, Ca1.8Mg1.2Al2Ge3O12:Cr3+ (CMAGG: Cr3+), 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 (Pfr), 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 Cr3+-doped FR phosphors to meet the precise spectral requirements for plant growth.

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Держатели документа:
Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and Energy, South China Agricultural University Guangzhou, Guangdong 510642, P. R. China
SBRAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia
Maoming Branch Guangdong Laboratory for Lingnan Modern Agriculture Maoming, Guangdong 525100, P. R. China

Доп.точки доступа:
Yang, Ch.; Zheng, D.; Zou, X.; Dai, X.; Tang, B.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhang, X.; Zhang, H.; Liu, Y.; Lei, B.
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