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Zhang Y, Ye Y, Zhao G, Liu Y, Liu L, Qiao X, Wang Z, Li B, Sun HT, Li JG, Hou J, Wang F, Fang Y. Rational Design of Nitride Phosphor-In-Glass with Robust Stability and Photoluminescence Performance. Inorg Chem 2024; 63:8889-8898. [PMID: 38693871 DOI: 10.1021/acs.inorgchem.4c00850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Phosphor-in-glass represents a promising avenue for merging the luminous efficiency of high-quality phosphor and the thermal stability of a glass matrix. Undoubtedly, the glass matrix system and its preparation are pivotal factors in achieving high stability and preserving the original performance of embedded phosphor particles. In contrast to the well-established commercial Y3Al5O12:Ce3+ oxide phosphor, red nitride phosphor, which plays a critical role in high-quality lighting, exhibits greater structural instability during the high-temperature synthesis of inorganic glasses. A telluride glass with a refractive index (RI = 2.15@615 nm) akin to that of nitride phosphor (∼2.19) has been devised, demonstrating high efficiency in photon utilization. The lower glass-transition temperature plays a crucial role in safeguarding phosphor particles against erosion resulting from exposure to high-temperature melts. Phosphor-in-glass retains 93% of the quantum efficiency observed for pure phosphor. The assembled white light-emitting diodes module has precise color tuning capabilities, achieving an optimal color rendering index of 93.7, a luminous efficacy of 80.4 lm/W, and a correlated color temperature of 5850 K. These outcomes hold potential for advancing the realm of inorganic package and high-quality white light illumination.
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Affiliation(s)
- Yuting Zhang
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Yuting Ye
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Guoying Zhao
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Yufeng Liu
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Lili Liu
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Xin Qiao
- Baotou Research Institute of Rare Earths, Baotou 014030, China
| | - Zhongzhi Wang
- Baotou Research Institute of Rare Earths, Baotou 014030, China
| | - Bo Li
- Baotou Research Institute of Rare Earths, Baotou 014030, China
| | - Hong-Tao Sun
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - Ji-Guang Li
- Research Center for Functional Materials, National Institute for Materials Science, Ibaraki, Tsukuba 305-0044, Japan
| | - Jingshan Hou
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Feng Wang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon 999077, Hong Kong SAR, China
| | - Yongzheng Fang
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
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Effect of Photoconversion Coatings for Greenhouses on Electrical Signal-Induced Resistance to Heat Stress of Tomato Plants. PLANTS 2022; 11:plants11020229. [PMID: 35050117 PMCID: PMC8779642 DOI: 10.3390/plants11020229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 12/22/2021] [Accepted: 01/14/2022] [Indexed: 11/17/2022]
Abstract
The use of photoconversion coatings is a promising approach to improving the quality of light when growing plants in greenhouses in low light conditions. In this work, we studied the effect of fluoropolymer coatings, which produce photoconversion of UV-A radiation and violet light into blue and red light, on the growth and resistance to heat stress of tomato plants (Solanum lycopersicum L.). The stimulating effect of the spectrum obtained as a result of photoconversion on plant growth and the activity of the photosynthesis process are shown. At the same time, the ability to withstand heat stress is reduced in plants grown under a photoconversion coating. Stress electrical signals, which normally increase resistance, in such plants have a much weaker protective effect on the photosynthetic apparatus. The observed effects are apparently explained by a decrease in the concentration of H2O2 in plants grown using photoconversion technologies, which leads to a shift in the development program towards increased productivity to the detriment of the protective function. Thus, when using photoconversion technologies in agricultural practice, it is necessary to pay increased attention to maintaining stable conditions during plant cultivation.
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Effects of Light Spectral Quality on the Micropropagated Raspberry Plants during Ex Vitro Adaptation. PLANTS 2021; 10:plants10102071. [PMID: 34685878 PMCID: PMC8537843 DOI: 10.3390/plants10102071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/16/2021] [Accepted: 09/27/2021] [Indexed: 11/16/2022]
Abstract
This work focuses on developing light environments for the effective regulation of morphogenesis and ex vitro conditions adaptation in micropropagated raspberry plants on the basis of photomorphogenetic control of physiological processes using light-emitting diodes (LEDs). In experiments with cloned plants growing ex vitro in stressful conditions during acclimation, the effects of optical radiation of various spectral combinations from different photosynthetically active radiation (PAR) spectral regions were studied. The data on the plant development and state of the photosynthetic apparatus, features of photosynthetic gas exchange and transpiration, accumulation of photosynthetic pigments, light curves of photosynthesis, and data on growth processes in light modes using combined quasimonochromatic radiation (either mixture of red, green, and blue light or red, far-red, and blue light) with various ratio of the distinct spectral regions were obtained. Photosynthetic apparatus functional activity under different light conditions was studied with chlorophyll fluorescence determination, and plant stress responses to growing under artificial spectral light conditions were characterized. The experiments were accompanied by detailed plant phenotyping at the structural and functional levels. Plant acclimation and photosynthetic improvements in response to added far-red and green light wavelengths to the main red-blue spectrum have been elucidated.
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