Article
Engineering, Electrical & Electronic
Poonam Devi, Priyanka Sehrawat, Monika Sheoran, Hina Dalal, Neeraj Sehrawat, R. K. Malik
Summary: Eu3+ activated Ca9Y(VO4)(7) nanomaterials radiating bright-red light were synthesized using a rapid, efficient, and ecological solution combustion technique. The XRD patterns confirmed the trigonal structure and the composition of the nanophosphors was determined by EDAX analysis. The nanophosphors exhibited non-uniform agglomerated particles in the nano-domain. The optical characteristics of the nanophosphor showed potential applications in various devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Ruby Priya, Piyush Sharma, Dinesh Kumar, Smriti, O. P. Pandey
Summary: The study reported the easy synthesis of phase pure and crystalline Eu doped BaTiO3 phosphors via solid-state method. The synthesized samples showed potential applications in optoelectronic and display devices, with characteristics including excitation by near UV and visible blue light, emission intensity at 617 nm under 465 nm excitation, and bi-exponential decay curves. The results were characterized using XRD, FESEM, UV-Visible, and photoluminescence techniques, along with Rietveld refinement and Dexter and Blasse's theory.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Multidisciplinary
Ikhlas Kachou, Kamel Saidi, Rached Salhi, Mohamed Dammak
Summary: A new NYVO:Eu3+ phosphor was prepared using the sol-gel method, and its optical properties and fluorescence thermometry were studied. The experimental results show that the phosphor exhibits high-brightness and thermally stable emission, making it suitable for LED applications and optical thermometry.
Article
Materials Science, Multidisciplinary
Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Mikhail A. Khodasevich, Vassily A. Medvedev, Evgenii Yu. Kolesnikov, Alina A. Manshina
Summary: Luminescence thermometry offers remote temperature sensing with high spatial and temporal resolution. Several strategies have been explored to maximize the performance of these thermal sensors, including the use of multiple temperature-sensitive parameters. In this study, luminescence thermometry based on single parameter monitoring (LIR, spectral line position, and bandwidth) was compared with multiparametric sensing based on principal component analysis. The results showed that multiparametric thermometry outperformed the classical single parameter approach, offering potential for further enhancement of the thermometric performances of luminescence thermometers through data calibration.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Umer Mushtaq, Vijay Kumar
Summary: This study reports on the synthesis and characterization of lithium gallate phosphors doped with varying concentrations of Eu3+ ions. The material exhibits a wide bandgap and stable fluorescence properties at room temperature, making it a potential candidate for red light-emitting components in LED applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Pavel O. Maksimchuk, Kateryna O. Hubenko, Vladyslav V. Seminko, Irina I. Bespalova, Oleksandr D. Opolonin, Alexander Sorokin, Ganna Grygorova, Svetlana L. Yefimova
Summary: This study investigates the radio-enhancing effects of nanoparticles containing high-Z elements on cancer cells. The research reveals that UV-light-pretreated nanoparticles generate hydroxyl radicals under X-ray irradiation, thereby enhancing the radiotherapy effect.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Inorganic & Nuclear
Peng Zhang, Wanying Xie, Zhenbin Wang, Zenggang Lin, Xiuxiang Huang, Zhenghua Ju, Weisheng Liu
Summary: This study demonstrates the time-dependent dynamic multicolor afterglow of LiGa5O8:Eu3+/Tb3+ phosphors, which can be applied in high-security anticounterfeiting and encryption applications.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Arup K. Kunti, Nirmalendu Patra, Richard A. Harris, Shailendra K. Sharma, Dibyendu Bhattacharyya, Sambhu N. Jha, Hendrik C. Swart
Summary: This study investigated the impact of Eu3+ doping concentration on the structural and luminescence properties of Eu3+ doped CaZrO3 red phosphors. Rietveld refinement method confirmed the occupancy of Eu3+ ions and explored the local structure around Eu3+ ions. Luminescence investigation showed the brightest red emission at 3 mol% Eu3+ doping concentration and revealed the energy transfer mechanism.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Yongping Huang, Zheng Liu, Yuexu Xiong, Wenlin Feng
Summary: The effect of charge compensation agent R+ on the luminescence properties of MgZn2(PO4)(2):Eu3+ phosphors was investigated, and the physical explanation for the improvement of Eu3+ emission intensity by R+ as a charge compensation was given. The fluorescence lifetime of MgZn2(PO4)2 phosphors co-doped 5% Eu3+ and 5% R+ (R = Na and K) was significantly improved, indicating high efficiency orange-red fluorescence under near ultraviolet excitation.
Article
Chemistry, Physical
Jose A. Jimenez, Mariana Sendova
Summary: This study investigates the relationship between the structure, thermal properties, and optical properties of phosphate glasses doped with large concentrations of Eu3+ ions and the Eu3+ content. The study finds the existence of a critical Eu2O3 concentration that divides the concentration range into two sections, with lower concentrations predominantly influenced by the long-range effects of the modifier electrostatic field and higher dopant concentrations predominantly influenced by the short-range effects of the modifier field. The authors propose that the long-range interactions lead to the shortening of P-tetrahedral chains, while the short-range interactions increase the covalent character of the bonds between nonbridging oxygens and Eu3+ ions. Concentration correlations between different macroscopic data sets further elucidate the microscopic LR-SR interplay between glass network formers and the cationic electrostatic field of the modifiers.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Ekta Rai, Ram Sagar Yadav, Dinesh Kumar, Akhilesh Kumar Singh, Vijay Janardhan Fulari, Shyam Bahadur Rai
Summary: Eu3+, Cr3+ doped and co-doped LaVO4 phosphors were prepared through a high temperature solid-state reaction method. The XRD patterns of the phosphors were sharp and intense, indicating a highly crystalline nature. The existence of La, Eu, Cr, V and O elements was confirmed by EDS spectra. The optical properties of the phosphors were influenced by the concentration of Cr3+ ion. The co-doped phosphors exhibited emission bands from both Eu3+ and Cr3+ ions. The energy transfer from Eu3+ to Cr3+ ions reduced the emission intensity of Eu3+ doped phosphor. The Eu3+, Cr3+ co-doped LaVO4 phosphor also exhibited heat generation upon excitation. These phosphors have potential applications in LEDs, solid state lighting and heat generating devices.
Article
Chemistry, Physical
Leonardo F. Saraiva, Airton G. Bispo-Jr, Sergio A. M. Lima, Ana M. Pires
Summary: A single-phase Eu3+-activated SrY2O4:Ce4+/3+ red-emitting phosphor was successfully synthesized through an adapted Pechini route at softer synthesis conditions. The structural study using Rietveld refinement and DFT calculations verified the presence of two hexa-coordinated Y3+ sites occupied by Eu3+. X-ray photoelectron spectroscopy (XPS) revealed the mixed oxidation state of cerium and its influence on phase stabilization. The photoluminescent analysis indicated that Eu3+ occupies at least two non-equivalent local sites, and the excited state dynamics were elucidated through theoretical band structure determination.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Donglei Wei, Hyo Jin Seo, Yushen Liu, Xifeng Yang
Summary: Eu3+-doped BaLa2WO7 and SrLa2WO7 phosphors were synthesized using solid-state reaction. The results showed that BaLa2WO7:Eu3+ exhibited stronger luminescence and higher thermal stability compared to SrLa2WO7:Eu3+. Laser site-selective excitation and luminescence technique revealed the presence of two distinct Eu3+ centers corresponding to La1 and La2 substitution. Energy transfer between Eu3+(A) and Eu3+(B) was observed in SrLa2WO7:Eu3+, but not in BaLa2WO7:Eu3+. The findings provide insights for the development of reddish-orange emitting materials by doping Eu3+ as a structural probe.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
C. M. Mehare, Girish Mishra, N. S. Dhoble, S. J. Dhoble
Summary: In this study, self-activated and co-doped Eu, Dy with CKZVO phosphors were synthesized and their structural and luminescent properties were investigated. The results showed that the phosphors exhibited emissions in multiple colors under UV excitation, making them potential materials for NUV-based white light-emitting diodes.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Engineering, Electrical & Electronic
Seungyong Shin, Sangmoon Park
Summary: Color-tunable and chromatic-stable Bi3+-Tb3+-Eu3+-doped barium-yttrium-orthogermanate phosphors were prepared under UV excitation. Orthogermanate phosphors with a trigonal unit cell structure (R3 ($) over barH) were synthesized using a LiCl flux in air. The photoluminescence excitation and emission spectra of the doped phosphors were studied, and the energy transfer processes between Bi3+-Tb3+, Bi3+-Eu3+, and Tb3+-Eu3+ were discussed.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Optics
Kai Han, Jianwei Qiao, Shuai Zhang, Binbin Su, Bibo Lou, Chong-Geng Ma, Zhiguo Xia
Summary: A design method is established by considering charge-transfer and recombination efficiencies in doped MHPs materials, improving the luminescence performance of MHP scintillators. Alloying Te4+ into Cs2ZrCl6 significantly enhances scintillation performance, including increased light yield and detection limit, as well as high-resolution X-ray imaging capabilities.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Binbin Su, Jiance Jin, Kai Han, Zhiguo Xia
Summary: This study successfully designs a new lead-free metal halide scintillator with high light yield, low detection limit, large X-ray attenuation efficiency, and stable and nontoxic compositions. It also develops a universal strategy for the preparation of large-sized scintillator screen in nondestructive X-ray imaging.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yingze Zhu, Xuesong Wang, Jianwei Qiao, Maxim S. Molokeev, Hendrik C. Swart, Lixin Ning, Zhiguo Xia
Summary: To promote the development of NIR light sources, the researchers discovered a novel Eu2+-activated broadband NIR-emitting phosphor and investigated its design principles and mechanism using density functional theory calculations. The results showed that with an increase in the Ba/Sr atomic ratio, the emission band of Eu2+ red-shifted and the FWHM enlarged. The application of NIR phosphor-converted LEDs was demonstrated, indicating their potential in night-vision technology.
CHEMISTRY OF MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Min Zhong, Lingqi Yue, Wei Liu, Hongyi Qin, Bingfu Lei, Riming Huang, Xian Yang, Yunyan Kang
Summary: In this study, eight Put genes were identified in tomato, which were distributed on four chromosomes and classified into three groups. The Put genes showed similarity in protein domains and gene structure. They were induced by various hormones and polyamines and expressed in all tomato tissues. Most of the Put genes were induced by abiotic stresses. Put2 was found to be responsive to salt stress and overexpression of Put2 in yeast and tomatoes conferred salinity tolerance by enhancing polyamine uptake and antioxidant capacity. The findings suggest that Put2 plays a crucial role in polyamine metabolism and antioxidant defense in tomatoes, providing a valuable gene for salinity tolerance in plants.
Article
Chemistry, Multidisciplinary
Zhiyu Yang, Tristan de Boer, Patrick M. Braun, Binbin Su, Qinyuan Zhang, Alexander Moewes, Zhiguo Xia
Summary: This study explores Eu2+-activated oxide-based double perovskites as red emitters with thermally stable photoluminescence for laser-driven lighting applications. The Sr3TaO5.5:Eu2+ ceramics demonstrate a red emission band and a constructed laser-driven white light wheel achieves a record luminous flux and excellent color rendering index.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xinquan Zhou, Kai Han, Yexin Wang, Jiance Jin, Shangda Jiang, Qinyuan Zhang, Zhiguo Xia
Summary: A new generation X-ray storage phosphor material, CsCdCl3:Mn2+, Zr4+, was designed and synthesized with improved performance by manipulating Mn2+ site occupation and heterovalent substitution. This material exhibited zero-thermal-quenching radioluminescence and anti-TQ X-ray-activated persistent luminescence, achieving high storage capacities and high-resolution X-ray imaging.
ADVANCED MATERIALS
(2023)
Article
Optics
Yuanyuan Li, Puxian Xiong, Bibo Lou, Hendrik C. Swart, Chonggeng Ma, Zhiguo Xia
Summary: Broadband NIR emission is achieved in Bi3+ activated perovskite oxides MZrO3 (M = Ba, Sr), and the luminescence mechanism is revealed through experimental and first-principles studies. The valence state of Bi3+ ions is confirmed to be trivalent, and the possibility of NIR emission from lower state bismuth is excluded. The selective occupancy of Bi3+ in different sites enables the emission discrepancy, where Bi3+ on M2+ sites accounts for visible emission while Bi3+ on Zr4+ sites shows NIR emission. The existence of Ba2+ vacancy has a significant influence on the emission spectra of Bi3+ visible emission.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Multidisciplinary
Jiance Jin, Kai Han, Yakun Hu, Zhiguo Xia
Summary: Metal halide scintillators with high light yield and sensitive detection are achieved by introducing Zn2+ into [TPPen](2)MnBr4. The introduction of Zn atoms enhances the light yield from 43,000 to 68,000 photons MeV-1 and decreases the detection limit from 696.9 nGy s(-1) to 204.1 nGy s(-1). X-ray imaging is realized using large-scale scintillator films made with TPPMZB or TPPMB, and the spatial resolution is improved from 4.6 to 11.2 lp mm(-1) after Zn2+ doping.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Lin Nie, Ting Wang, Xue Yu, Wei Gao, Qingpeng Peng, Zhiguo Xia, Jianbei Qiu, Siu Fung Yu, Xuhui Xu
Summary: Direct laser patterning allows precise tailoring of perovskites at the microscale, which is important for advanced optoelectronic devices. However, thermal ablation can lead to imprecise crystallization, limiting the resolution of the technique. This study demonstrates a method of crystallizing perovskite nanoparticles by photon effect, avoiding undesired crystallization and destruction. This technique enables the production of high-transparency, high-resolution, and stable multicolor perovskite PVDF films, potentially applicable in flexible displays.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Yu Chen, Zhiyu Yang, Jiance Jin, Jianwei Qiao, Yuzhen Wang, Maxim S. Molokeev, Hendrik C. Swart, Zhiguo Xia
Summary: Exploring oxide-based red-emitting phosphors is important for improving the color rendering index and reducing the correlated color temperature of white-light-emitting diode (LED) lighting sources. This study synthesized a red-emitting Sr2LaGaO5:Eu2+ oxide phosphor and successfully achieved tunable emission by substituting Sr with Ba atoms. By mixing different colored phosphors, a white LED device with high color rendering index and low color-dependent temperature was fabricated.
CHEMISTRY OF MATERIALS
(2023)
Article
Optics
Taoze Wang, Yuzhen Wang, Weibin Chen, Zhiguo Xia
Summary: In this study, Na2SrGe6O14:Cr3+ (NSGO:Cr) glass ceramics (GC) with ultra-broad emission band and high EQE were fabricated. Yb3+ co-doping significantly enhanced Cr3+ -> Yb3+ energy transfer, leading to improved thermal stability. Furthermore, the encapsulant-free NIR GC-converted LED exhibited high output power and photoelectric conversion efficiency.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yuzhen Wang, Gaochao Liu, Zhiguo Xia
Summary: This study successfully achieved near-infrared (NIR) II emission in a certain calcium gallium silicate crystal by designing and verifying the occupation of Cr4+ ions. The phosphor exhibited broadband NIR-II emission under red light excitation, with good temperature response and relative sensitivity.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Yakun Hu, Jiance Jin, Kai Han, Zhiguo Xia
Summary: Doping Cu+ in Rb2AgBr3 leads to cold-white light emission at room temperature without changing the spectral profiles. The Cu+ incorporation significantly enhances the photoluminescence quantum efficiency and scintillation performance. By mixing Cu+ doped Rb2AgBr3 scintillators with polydimethylsiloxane, a large scintillator film with high spatial resolution for X-ray imaging is achieved.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bohan Li, Jiance Jin, Meijuan Yin, Kai Han, Yuchi Zhang, Xinlei Zhang, Anran Zhang, Zhiguo Xia, Yan Xu
Summary: High-performance glass-ceramic (G-C) scintillators with improved light yields and lower detection limits are developed from 0D hybrid metal halide (HMH) glass through in situ recrystallization. This opens up possibilities for phase transformation engineering in 0D HMHs and enables their application in large-area scintillation screens.
Article
Chemistry, Multidisciplinary
Meijuan Yin, Bohan Li, Zishuo Yi, Yuchi Zhang, Zhiguo Xia, Yan Xu
Summary: This study reports four zero-dimensional Sb-based halide glasses that exhibit reversible phase transition and modulated luminescence properties. The findings offer potential applications in information encryption and anti-counterfeiting.
CHEMICAL COMMUNICATIONS
(2023)
