Article
Chemistry, Multidisciplinary
Kaiyuan Deng, Yahong Jin, Lifang Yuan, Bo Wang, Haoyi Wu, Yihua Hu
Summary: Artificial light-emitting diode (LED) light source, which is considered a leading technology for promoting plant growth, has gained attention for fertilizer-free indoor plant cultivation. A recent study has reported a far-red-emitting phosphor with high-thermal stability and demonstrated the potential of using far-red LED light sources to regulate plant growth.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Song Li, Wei Hu, Mikhail G. Brik, Shixun Lian, Zhongxian Qiu
Summary: Non-rare earth doped red phosphors are attracting attention for warm-white lighting and indoor plant cultivation. This study successfully synthesized two kinds of Mn2+-doped red-emitting phosphors with good thermal stability, and their emission wavelengths and spectral properties are well-matched with application requirements.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Multidisciplinary
Yingbin Meng, Peican Chen, Hua Fan, Zuizhi Lu, Xiaoying Zhong, Jiangying Lu, Yingjun Ou, Liya Zhou
Summary: In this study, the crystal structure, surface morphology, optical properties, and thermal properties of LCZ: Mn4+ phosphors were investigated. The possible site of Mn4+ ions was discussed based on density functional theory. The doped phosphor showed enhanced light absorption capacity and a wider absorption range, and emitted deep-red light with potential application value in plant growing LEDs.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Ceramics
Yajun Jia, Chengdong Peng, Meng Gao, Keqin Yang, Aiying Wang, Yuexiao Pan
Summary: A new type of Mn4+ doped phosphor KRGF:Mn has been synthesized and its moisture stability has been improved through surface modification, maintaining bright red light even after long-term immersion. The luminescence efficiency and thermal stability of KRGF:Mn have been optimized for LED lighting applications in indoor plant growth.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Sheng Wu, Shanshan Hu, Quan Liu, Shuai Zhang, Dongliang Jiang, Guoxing Zhang, Yakun Le, Yao Xiao, Binli Xiao, Puxian Xiong, Yan Chen, Yinzhen Wang
Summary: The self-reduction of Mn4+ -> Mn2+ and excellent thermal stability of NaY9Si6O26:Mn2+ red phosphors were achieved. The effect of defects on luminescence properties was highlighted, stimulating further research on defect control.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Guna Doke, Guna Krieke, Andris Antuzevics, Anatolijs Sarakovskis, Baiba Berzina
Summary: Materials with persistent luminescence (PersL) have attracted significant interest, especially in the blue and green spectral regions. However, there is limited research on the afterglow in the red spectral range. In this study, manganese doped Mg2SiO4, Mg2GeO4, and their solid solutions were prepared and analyzed comprehensively. The materials exhibited bright red persistent luminescence, with the best phosphor showing an afterglow for more than 16 hours. The analysis revealed the presence of multiple trap centers and charge traps associated with trapped hole and trapped electron centers, contributing to the PersL processes.
Article
Materials Science, Ceramics
Xianju Zhou, Shouchun Zhao, Jie Zhang, Guotao Xiang, Sha Jiang, Li Li, Yongjie Wang, Yanhong Li, Chuan Jing, Lu Yao, Hongmei Yang, Zhen Wang
Summary: In this study, methamidine acetate and manganese divalent cation codoped CsPbCl3 quantum dots were synthesized. The results showed that these quantum dots exhibited improved optical performance, thermal stability, and thermal cyclability at high temperature. Additionally, their UV light and water stability were enhanced. Furthermore, the quantum dots were successfully applied in white LEDs with good color rendering index and correlated color temperature.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yifeng Yan, Chaolian Luo, Shaokun Ling, Jie Liang, Sen Liao, Yingheng Huang
Summary: A series of Gd2SrAl2O7:Mn4+/Bi3+/Na+ phosphors were synthesized by sol-gel method. Experimental results show energy transfer from Bi3+ to Mn4+. By introducing Bi3+ and Na+ ions, the emission intensity of the optimal phosphor is increased to 2.5 times that of Gd2SrAl2O7:Mn4+ with a high internal quantum yield of 79.9%. The optimal phosphor also exhibits good luminescence thermal stability and its PL intensity at 423 K retains 80.2% of that at room temperature, with an activation energy of 0.45 eV. The enhanced photoluminescence is attributed to efficient energy transfer, charge compensation, and enhanced crystal rigidity. The performance indexes support the potential application of the optimal phosphor in plant growth lighting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Chenyang Zhan, Haomiao Zhu, Sisi Liang, Yingping Huang, Zihao Wang, Maochun Hong
Summary: A strategy to improve the absorption of Mn2+-activated phosphors is proposed by selecting a suitable host, resulting in a high doping concentration of Mn2+. The prepared LAO:0.30Mn(2+) phosphor exhibits intense narrowband green emission, high color purity, and high efficiency, making it suitable for wide-color gamut LCD backlight applications.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Materials Science, Ceramics
Lin-Ying Shi, Dan Zhao, Rui-Juan Zhang, Qing-Xia Yao, Wen Liu
Summary: In this study, a new phosphor Ba3MgSb2O9:Mn was successfully prepared by a high-temperature solid-state synthesis method. The Mn-n(+) ions can replace different sites in the structure, exhibiting different emitting intensities at specific temperature ranges. This phosphor can be used as an optical temperature sensor based on the fluorescence intensity ratio of Mn2+ and Mn4+.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Zixin Wang, Hui Lin, Dawei Zhang, Yiming Shen, Yang Li, Ruijin Hong, Chunxian Tao, Zhaoxia Han, Lei Chen, Shengming Zhou
Summary: Deep-red emitting Mg2TiO4:Mn4+ phosphor ceramics were synthesized and showed narrow emission suitable for photosynthesis. The ceramics had a high thermal conductivity compared to traditional packaging methods and when combined with blue LED chips, the color and brightness of the resulting LEDs could be adjusted for plant lighting.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Chemistry, Physical
Yuee Ke, Yu Wang, Yuanyuan Liu, Shanshan Chen, Junmeng Luo, Jianxu Wang, Tao Wang, Jin Zhao, Bin Deng, Ruijin Yu
Summary: By optimizing the reaction temperature, deep-red emitting CaY0.5Ta0.5O3:Mn4+ phosphors were synthesized with a strong luminescence intensity. The photoluminescence spectra exhibited a deep-red broadband luminescence, with a dominant peak at 680 nm due to the transition of Mn4+ in TaO6 octahedral structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Aixia Deng, Zilong Wang, Xufeng Zhou, Wanying Geng
Summary: A novel apatite-based phosphor MgGd4Si3O13:Ce3+, Mn2+ was successfully synthesized and its potential application as a dual-excitation luminescent ratiometric thermometer was studied. The experiment showed that the fluorescent intensity ratio of Ce3+ and Mn2+ was linearly correlated with temperature in a specific range, indicating its high sensitivity as a thermometer.
Article
Materials Science, Ceramics
Zhanglin Chen, Zhaobo Tian, Jie Zhang, Fei Li, Songmo Du, Wei Cui, Xuanyi Yuan, Kexin Chen, Guanghua Liu
Summary: Mn4+-activated double-perovskite type Ca2ScSbO6 (CSS) phosphors were successfully synthesized using high-temperature solid-state reaction, with Mn4+ ions confirmed to be incorporated into the CSS lattice. The optimized CSS:0.3%Mn4+ phosphor exhibited bright deep-red emission under 310nm excitation, maintaining a relatively high emission intensity even at elevated temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Li Zhang, Zhijun Wang, Danjie Dai, Zhenhua Xing, Jinxin Zhao, Xiaotong Li, Chunjiao Liu, Dawei Wang, Zhiping Yang, Panlai Li
Summary: A series of phosphors with different compositions were synthesized in this study to investigate the influence of partially substituting Ca2+ with Sr2+ and Ba2+. The shift of emission peaks of Ce3+, Mn2+, and Tb3+ were explained, with the significant impact of the Ca-1 lattice on the shift of the Ce3+ emission peak being discovered.
NEW JOURNAL OF CHEMISTRY
(2021)