Article
Materials Science, Ceramics
L. Vijayalakshmi, K. Naveen Kumar, Jong Dae Baek
Summary: Multicolor emitting Dy3+/Eu3+ coactivated lithium zinc borate (LZB) glasses were prepared by the melt-quenching method. Dy3+ glasses exhibited blue, yellow, and red photoluminescence (PL) bands at various wavelengths. Eu3+ glasses exhibited strong orange and reddish-orange emissions. Efficient energy transfer from Dy3+ to Eu3+ was observed through dipole-dipole interaction. The glasses have potential applications in warm white light and multicolor emitting devices.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ulas Korkmaz, Beyza Ozlem, Erdinc Erol, Melis Ozge Alas, Rukan Genc Alturk, Miray Celikbilek Ersundu, Ali Ercin Ersundu
Summary: In this study, blue-emitting carbon dots (BCDs) were coupled with Eu3+/Tb3+ co-doped luminescent glasses to achieve adjustable light emission for solid-state white light-emitting diodes. The BCD-coated Eu3+/Tb3+ co-doped luminescent glasses exhibited outstanding luminescence performance and stability, indicating great potential as a substitute for traditional solid-state lighting sources.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Ceramics
Zhe Tang, Jianqi Qi, Zhangyi Huang, Lexing Liang, Ajiao Liu, Yucheng Ye, Yutong Zhang, Tiecheng Lu
Summary: In this study, a multicolor-tunable Eu3+/Bi3+:Y2Zr2O7 transparent ceramic was successfully fabricated for the first time using vacuum sintering technology. The obtained samples showed bright, white light emission by combining green and red emissions, and also exhibited strong red and orange emissions under different excitation wavelengths. With excellent high temperature performance and mechanical properties, these ceramics have promising potential as white-light-emitting materials.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
L. Vijayalakshmi, K. Naveen Kumar, Ch Tirupataiah, Jong Dae Baek, Pyung Hwang
Summary: The biocompatible lithium zinc borate glasses co-doped with Ce3+ and Eu3+ exhibit excellent optical properties, including broad blue and red emissions, as well as efficient energy transfer from Ce3+ to Eu3+. These glasses show promising potential for white light applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Optics
Shubham Srivastava, Shantanu K. Behera, Bibhuti B. Nayak
Summary: This study investigates the excitation wavelength dependent photoluminescence characteristics and white light generation in europium and terbium doped yttrium borate phosphors. Results show that adjusting the concentrations of europium and terbium can produce multi-color emissions, including white light. The optimal combination was found to be 3 mol% Eu and 5 mol% Tb co-doped YBO3 for white light emission.
Article
Materials Science, Ceramics
Yuhang Zhang, Baojiu Chen, Yongze Cao, Xizhen Zhang, Jinsu Zhang, Sai Xu, Xiangping Li, Lei Li, Hongquan Yu, Duan Gao, Xuezhu Sha, Li Wang, Desheng Li, Hai Lin
Summary: By studying the spectroscopic and chromatic properties of Ag-aggregates and Mn2+ doped germanate glasses, it was found that these materials exhibit broadband emission and optical gain, making them promising candidates for applications in white light-emitting-diodes and broadband tunable lasers.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Anu, A. Kumar, Ravina, N. Deopa, A. S. Rao
Summary: A series of Dy3+/Eu3+ co-doped oxyfluoride strontium zinc borosilicate (OFSZBS) glasses were prepared and characterized. The structural properties were analyzed using XRD and SEM with EDX. UV-Vis absorption spectroscopy was employed to determine the energy band gaps. Photoluminescence (PL) spectra were observed under different excitations, resulting in warm white light generation. The energy transfer mechanism between Dy3+ and Eu3+ ions was investigated, and the energy transfer efficiency in the co-doped glasses ranged from 8% to 50%. The color tunability of the OFSZBSDE2.0 glass was confirmed using CIE chromaticity color coordinates. These findings demonstrate the potential applications of Dy3+/Eu3+ co-doped OFSZBS glasses in warm white LEDs and tuned devices.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Jiayuan Chen, Yuan Gao, Junhao Li, Zhengxu He, Dacheng Zhou, Jianbei Qiu
Summary: In this study, Eu-doped oxy-fluoride glass-ceramics were successfully fabricated for synthesizing warm white light-emitting diodes (WLEDs) with adjustable warm white emission and high color stability.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Physics, Condensed Matter
Yu Han, Ce Li, Xu Zhang
Summary: This paper synthesized a new phosphor NaGdSb2O7 (NGSO) using the high-temperature solid-phase method. By studying the luminous intensity of Dy and Eu under different doping conditions and adjusting the doping ratio, the transition from cold white light to warm white fluorescence emission was achieved. Additionally, partial replacement of Sb with Nb changed the band gap and band structure, leading to enhanced light intensity. Experimental results using various methods showed that NGSO: Dy, Eu, Nb phosphors have potential applications in the field of white LEDs.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Inorganic & Nuclear
Nihel Hsouna, Chaker Bouzidi
Summary: Europium and Terbium co-doped phosphate glasses were successfully produced and their structural and optical properties were studied. The addition of Terbium enhanced the photoluminescence intensity and spectroscopic features of the material, acting as a sensitizer for Europium. Excitation transfer and energy transfer mechanisms were identified and explained experimentally and theoretically. The co-doped glass showed promise in field emission displays.
SOLID STATE SCIENCES
(2022)
Article
Optics
Qiang Ren, Yujing Zhao, Xiulan Wu, Ou Hai
Summary: The research successfully synthesized single-phase phosphor samples co-doped with Tb3+/Eu3+/Tm3+ in LaAl2.03(B4O10)O-0.54, demonstrating potential application value in the field of white-emitting phosphors.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Hansol Lee, Jinju Lee, Kenji Shinozaki, Woon Jin Chung
Summary: BaF2-Al2O3-B2O3-SiO2 glasses and glass-ceramics doped with Eu3+-Tb3+ were fabricated for white LEDs. The addition of SiO2 improved the thermal and mechanical stability while maintaining a high quantum yield. Excellent chromatic properties were achieved, including pure white color coordinates and a high color rendering index, for the white LED.
Article
Materials Science, Ceramics
R. Lisiecki
Summary: Germanatetellurite glasses doped with dysprosium at different concentrations were studied for their luminescence characteristics and temperature-dependent absorption using optical spectroscopy techniques. The findings revealed that the efficiency of dysprosium excitation decreases at higher temperatures and demonstrated the presence of effective dysprosium interactions in the studied glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Applied
Jingxi An, Shuang Zhang, Ruiwang Liu, Guangxu Hu, Zhiwei Zhang, Yiyu Qiu, Yanyan Zhou, Fanming Zeng, Zhongmin Su
Summary: The rare earth ion-doped fluorescent glass prepared in this study emits white light under ultraviolet excitation, with a higher yellow light/blue light value and the ability to reduce correlated color temperature. Energy transfer from Dy3+ to Eu3+ is demonstrated, achieving light emission conversion.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Inorganic & Nuclear
Santosh K. Gupta, Brindaban Modak, Pampa Modak, Yuanbing Mao
Summary: In this work, controlled energy transfer was achieved by suppressing the host to dopant energy transfer in La2Hf2O7:Eu3+ nanoparticles through co-doping with uranium ions. The co-doping creates negatively charged vacancies in the system to compensate for the excess charge in U and Eu co-doped La2Hf2O7 NPs, suppressing the formation of oxygen vacancies. This study demonstrates the potential for producing near perfect white light emission by utilizing the full color gamut in La2Hf2O7:Eu3+,U6+ nanoparticles.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Applied
Jiannan Jia, Mengting He, Jun Wan, Yuting Zhang, Hai Guo, Xianping Fan, Xusheng Qiao, Shiguo Chen
Summary: Tetravalent Mn4+ doped phosphors show great potential in expanding the color gamut of phosphor converted LED displays. By synthesizing regular cage-like micro spherical phosphors and optimizing doping and substitution strategies, the internal quantum efficiency and stability of the phosphors can be significantly improved. The use of these phosphors in high-performance LED displays can achieve a much broader color gamut compared to the NTSC standard.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Physical
Ghulam Abbas Ashraf, Raqiqa Tur Rasool, Muhammad Hassan, Lanting Zhang, Hai Guo
Summary: By synthesizing Gd-Tl substituted Ba0.75Cu0.25(GdxTl0.5-x)Fe11.5O19 nanoparticles, the study successfully explored their heterogeneous catalytic performance in the degradation of MB, achieving efficient degradation of MB. The nanoparticles demonstrated excellent degradation effects, with 99% and 98% degradation rates at pH 7 solution in the presence of 16mM H2O2, showing high catalytic behavior and stability.
MOLECULAR CATALYSIS
(2021)
Article
Materials Science, Ceramics
SunYueZi Chen, ZhuoXing Wen, XiuSha Peng, Ghulam Abbas Ashraf, RongFei Wei, Tao Pang, Hai Guo
Summary: The study investigated a novel efficient and transparent Eu3+-doped boroaluminate glass fabricated using the melt quenching technique, showing significantly enhanced optical responses to UV and X-ray. The optimal doping concentration of Eu3+ was found to be 8 mol%, with an internal quantum yield of 53.2% and high transparency. Additionally, the glass exhibited an X-ray excited luminescence integrated intensity of 18.4% of a commercial single crystal scintillator.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
LianJie Li, Ye Tong, Jing Chen, YiHang Chen, Ghulam Abbas Ashraf, LiPing Chen, Tao Pang, Hai Guo
Summary: In this study, Na2GdMg2(VO4)(3):Yb3+,Er3+ phosphors were synthesized and their crystal structures, luminescent characteristics, and temperature sensing properties were investigated. The results suggest that these phosphors could potentially serve as optical temperature sensing materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Jiaxuan Hu, Xing Zhang, Haihong Zheng, Fumin Lu, Xiusha Peng, Rongfei Wei, Fangfang Hu, Hai Guo
Summary: A novel sequence of Ba3-xSrxLu4O9: Er3+/Yb3+ phosphors was successfully prepared for investigating temperature sensing property. Energy transfer and lattice environment regulation significantly improved Er3+ up-conversion luminescence. Multi-mode optical thermometry exhibited superior temperature measurement performances in wide range, signal discriminability, sensitivity, and repeatability.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
HaiLin Gong, XiuSha Peng, Ghulam Abbas Ashraf, FangFang Hu, RongFei Wei, Hai Guo
Summary: NaY2F7:Er3+,Yb3+ glass-ceramics with high transmittance were successfully prepared using a melt-quenching technique and subsequent thermal treatment. The improved crystallinity led to significantly higher up-conversion emission intensity compared to the precursor glass. The Er3+ ions showed excellent optical thermometry performance with high sensitivity and temperature resolution for self-calibration temperature measurement.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yi Cheng, Yubin Wang, Denghao Li, Juan Bao, Degang Deng, Hai Guo, Lei Lei
Summary: Lanthanide doped Gd2Ti2O7 crystals prepared by a modified sol-gel method show enhanced luminescence intensity at higher temperatures, resulting in high relative temperature sensitivity and potential applications in temperature sensing and anti-counterfeiting.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ghulam Abbas Ashraf, Raqiqa Tur Rasool, Jing Chen, Lianjie Li, Muhammad Hassan, Jazib Ali, Lanting Zhang, Hai Guo
Summary: Element engineering in the Mhexaferrite system has been shown to boost catalytic activation effectively. This study used a novel LaCr substituted Mhexaferrite photocatalyst for degrading organic pollutants in water under LED irradiation, achieving more efficient results compared to conventional Mhexaferrite NPs.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Tao Pang, Ronghua Jian, Junwen Mao, Hai Guo
Summary: Realizing highly sensitive multi-color upconversion luminescence by adjusting the laser power remains a challenge. In this research, Er2Mo4O15 without concentration quenching of luminescence was used, and the incorporation of heterogeneous Tm3+ impurities significantly improved the response of luminescence color to laser power. By solving a set of rate equations, it was clarified that the power-dependent depletion of the I-4(11/2) level was responsible for the modulation of luminescence color. It was also proved that the enhancement of luminescence was in relation to the blocked energy migration and enhanced radiative transition probability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Tao Pang, Yanyan Wu, Yujian Zhang, Ronghua Jian, Junwen Mao, Hong Wang, Hai Guo
Summary: This study demonstrates that the temperature effect on UC luminescence in NaGdF4:Nd3+/Yb3+/Er3+ nanocrystals is strongly dependent on the exciting wavelength. The UC luminescence shows good resistance to thermal quenching when excited using 808 nm radiation. The research provides a novel strategy for anti-thermal quenching of upconversion luminescence with potential applications in dynamic UC anti-counterfeiting, NIR-I-responsive thermometers, and nanoheating.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
WenJun Huang, ZhuoXing Wen, LianJie Li, Ghulam Abbas Ashraf, LiPing Chen, Lei Lei, Hai Guo, XiaoMan Li
Summary: This study investigated the structural, luminescent, and scintillating properties of Tb3+-doped glass scintillators. The sample with a Tb3+ doping concentration of 10% showed the best scintillating performance and could be used as a potential scintillator.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Fangfang Hu, Gong Hailin, Ghulam Abbas Ashraf, Xiong Tao, Rongfei Wei, Hai Guo, Min Yin
Summary: In this study, transparent oxy-fluoride glass ceramics (GC) were successfully fabricated and applied as host materials for optical thermometers. The Na2GdF7:xTb3+ (x = 0.02, 0.03, 0.04, 0.05, and 0.06) GC samples exhibited high transparency and were researched for their structural, micro-topography, and fluorescence spectra properties. The Na2GdF7:0.3Tb3+ GC sample showed enhanced luminescence compared to the precursor glass and demonstrated excellent performance in low-lying state thermal coupling principle.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Jing Chen, JiaJia Guo, LiYuan Chen, ShuJun Xu, XiuSha Peng, Tao Xiong, Tao Pang, Ghulam Abbas Ashraf, HuiJun Li, Hai Guo
Summary: An experimental optimization design methodology was used to determine the optimal doping concentrations of a multi-doped luminescent material, and the results showed that this method effectively optimized the luminescent properties of the material.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
JianQuan Chen, JunYu Chen, WenNa Zhang, ShuJun Xu, LiPing Chen, Hai Guo
Summary: A series of CLMV:Sm3+ phosphors were synthesized as new optical temperature sensing materials, and their structures, morphologies, and luminescent properties were investigated. The energy transfer from VO(4)(3-)to Sm(3+) was demonstrated, and a three-mode optical temperature sensor was designed based on the temperature dependent emission and excitation characteristics of VO(4)(3-) and Sm(3+). The sensing modes included the fluorescence intensity ratio (FIR) of I(Sm3+) and I(VO43-), Commission International de L'Eclairage (CIE) coordinate, and the excitation intensity ratio (EIR) of I-383nm/I-405nm. The CLMV:Sm3+ phosphors showed high absolute and relative sensitivities in FIR and EIR modes, indicating their potential as self-referencing optical thermometers.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Rongfei Wei, Fumin Lu, Li Wang, Fangfang Hu, Xiangling Tian, Hai Guo
Summary: This study demonstrates quadruple luminescence thermometric techniques using Cs3GdGe3O9:Er3+ phosphors, which can achieve visual perception of temperature with different colors at different wavelengths. The thermometers show excellent sensitivity and resolution.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
