Article
Chemistry, Physical
Bilel Charfi, Kamel Damak, Ramzi Maalej, Mohammed S. Alqahtani, Khalid Hussein, Ali M. Alshehri, Abdulrahman M. Hussain, Bozena Burtan-Gwizdala, Manuela Reben, El Sayed Yousef
Summary: Halide phosphate glasses with a composition of 40P(2)O(5)-30ZnO-20LiCl-10BaF(2) doped with 3.5 x 10(4) ppm Pr2O3 were synthesized and showed broadband emission photoluminescence, making them suitable for fabricating broadband near infrared optical amplifiers.
Article
Optics
Pankaj Gupta, Mohit Sahni, Sunil Chauhan
Summary: This study focuses on the synthesis of rare earth doped Y0.50Gd0.45RE0.05BO3 and their impact on photoluminescence properties, with results showing that doped samples exhibit a monophasic nature and lattice parameter increases with Gd content.
Article
Chemistry, Physical
Sushri Sangita Nanda, Priyanka Nayak, S. K. Mandal, D. Jana, U. K. Goutam, S. Dash
Summary: A series of Gd3+-Eu3+ doped microphosphors with minimal concentration of Gd3+ were successfully synthesized using modified hydrothermal techniques. The photoluminescence emissions of Gd3+ and Eu3+ were observed in the doped and codoped phosphors, and the Gd-doped phosphors showed potential in phototherapy applications. The emission peak intensity of Eu3+ varied with Eu3+ concentrations, and quenching occurred at higher doping level.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
Ram Gopal, Jairam Manam
Summary: The article investigates the photoluminescence properties of BaWO4: Eu3+ red phosphors excited by UV, near-UV, and blue light. The addition of Eu3+ ions leads to optical band gap narrowing. The most intense peaks for excitation occur at 255 nm (UV), 395 nm (near-UV), and 465 nm (blue), and the emission spectra at these excitation wavelengths are identical. The synthesized material shows potential as a red phosphor for white-LED, laser, and display devices.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Gohar Hovhannesyan, Vincent Boudon, Maxence Lepers
Summary: This study presents a modified version of the Judd-Ofelt theory, which describes the intensities of f-f transitions for trivalent lanthanide ions in solids. By applying this model to europium, the researchers were able to gain physical insight into all transitions within the ground electronic configuration and quantitatively reproduce experimental absorption oscillator strengths. This model opens up the possibility to interpret polarized-light transitions between individual levels of the ion-crystal system.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
M. A. Marzouk, F. H. ElBatal, Y. M. Hamdy, H. A. ElBatal
Summary: Undoped glass and Nd2O3-doped samples were prepared and investigated for lasing application. The undoped sample showed two UV absorption peaks, while Nd2O3-doped samples exhibited 10 distinct peaks in the UV-Visible range. Emission spectra revealed three different bands at 875 nm, 1056 nm, and 1326 nm. Judd-Ofelt theory was used to estimate Judd-Ofelt parameters and radiative properties. FTIR vibrational analysis suggested the presence of different chemical groups and structural transformations in the samples.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Optics
A. K. Varshney, Mainuddin, Sanjeev Kumar, Ashwani Kumar, Gaurav Singhal, Mohini Gupta, G. Vijaya Prakash
Summary: The optical and thermal properties of Nd3+ doped inorganic liquid medium were investigated for the development of a scalable laser source. The synthesized liquid medium showed good lasing potential and transparency, and the thermal studies showed a feasible laser configuration. This study is very helpful for the development of scalable laser sources.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Naziha Boudchicha, Mostepha Iezid, Faycal Goumeidane, Messaoud Legouera, P. Syam Prasad, P. Venkateswara Rao
Summary: In this study, a series of glasses based on the TeO2-BiCl3-RE2O3 system were prepared and characterized for their thermal stability, density, refractive index, and structure. The results demonstrate that these glasses are potential candidates for nonlinear optic fibers and solid laser materials.
Article
Materials Science, Multidisciplinary
A. Herrmann, A. A. Assadi, R. Lachheb, M. Zekri, A. Erlebach, K. Damak, R. Maalej, M. Sierka, C. Ruessel
Summary: Understanding the relationship between molecular structure and optical properties of rare earth doped luminescent materials is important for creating advanced active laser media. Rare earth ions can also be used to study the molecular structure of the host material. This study combines molecular dynamics simulations, Judd-Ofelt theory, and UV-vis-NIR absorption spectroscopy to investigate the local molecular structure surrounding doped rare earth ions in glasses with different compositions. The results show that the composition of the glass affects the absorption spectra and coordination numbers of the rare earth ions.
Article
Materials Science, Multidisciplinary
D. Said, M. F. Malek, H. Nurhafizah, E. S. Sazali, A. L. Anis, R. Hisam
Summary: Er3+/Ho3+ doped Al2O3-Na2O-TeO2 glasses containing different concentrations of V2O5 were prepared and their structural, optical, and photoluminescence properties were studied. The presence of non-bridging oxygen in the glass network was demonstrated by measuring the relative areas of TeO4 and TeO3. The optical absorption edge analysis showed a decrease in EiOpt due to the prevalence of non-bridging oxygen. The Judd-Ofelt oscillator strength increased with an anomalous drop at x = 1.0 mol% due to the competition between bridging and non-bridging oxygen. The photoluminescence spectra revealed dominant emissions in the green and red regions, with a decrease in intensity as vanadium increased.
Article
Optics
Dorsaf Bayoudhi, Chaker Bouzidi, Elena Matei, Mihail Secu, Aurelian Catalin Galca
Summary: Undoped and Sm3+doped 45P2O5-45Na2O-2Al2O3-8BaO glasses were synthesized and their structure and luminescence properties were investigated. The results showed that the doping of Sm3+ did not affect the overall structure of the glass and the glass exhibited a high color purity of 98%, making it a potential candidate for laser emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Michael R. George, Paul E. Critchley, George F. S. Whitehead, Andrew J. Bailey, Francesco Cuda, Benedict N. Murdin, Martin C. Grossel, Richard J. Curry
Summary: A study was conducted on the ability of pyridine-2,6-dicarboxylic acid and its analogues to sensitize emission from various rare earth ions, showing different sensitization effects. The 4-chloro-substituted complex demonstrated enhanced near-infrared emission for Nd3+ and Er3+, indicating potential applications in this area.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
N. Latha, D. Kavyashree, D. R. Lavanya, G. P. Darshan, J. Malleshappa, T. B. Nijalingappa, H. Nagabhushana
Summary: A series of Dy3+ doped BiOCl NPs were fabricated using Aloe Vera gel as a bio-surfactant via ultrasound assisted sonochemical route. The morphology of the nanophosphor was engineered by varying experimental parameters, showing potential applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Vijeta Tanwar, Sitender Singh, Isha Gupta, Pawan Kumar, Harish Kumar, Bernabe Mari, Devender Singh
Summary: Eu(III)-activated Forsterite nanophosphors were synthesized using sol-gel technique. The structural and phase purity of the materials were characterized by XRD and FT-IR studies. The nanophosphors exhibited aggregated particles with sizes ranging from 50 to 80 nm. The materials showed efficient excitation under UV light and emitted red fluorescence at 613 nm. The optical properties were analyzed using J-O analysis, which revealed the influence of covalent character and structural environment on the properties. The nanophosphors demonstrated bright red color, making them suitable for optoelectronic applications.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Optics
N. T. M. Thuy, V. T. K. Lien, P. Do, V. T. K. Oanh, N. X. Truong, N. X. Ca, N. T. Hien, P. M. Tan
Summary: ZnS semiconductor quantum dots (QDs) co-doped with Er3+ and Sm3+ ions were successfully prepared using a wet chemical method. The presence of Er3+ and Sm3+ in the ZnS host was confirmed by XRD and XPS. The QDs showed a zinc blende (ZB) structure with a spherical shape and a particle size of about 4 nm. The optical properties were studied by varying the Er3+ ion concentration while keeping the Sm3+ ion concentration constant. The results revealed covalency between the ligands and rare-earth ions, and confirmed the energy transfer processes between the ZnS host and Er3+ ions, as well as between Er3+ and Sm3+ ions.
JOURNAL OF LUMINESCENCE
(2023)
Article
Nanoscience & Nanotechnology
N. Dhananjaya, S. R. Yashodha, C. Shivakumara
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2017)
Article
Nanoscience & Nanotechnology
S. R. Yashodha, N. Dhananjaya, C. Shivakumara
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2017)
Article
Chemistry, Physical
R. Venkatesh, N. Dhananjaya, M. K. Sateesh, J. P. Shabaaz Begum, S. R. Yashodha, H. Nagabhushana, C. Shivakumara
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Materials Science, Multidisciplinary
N. P. Ambujakshi, H. R. Raveesha, S. R. Manohara, N. Dhananjaya, S. Pratibha, C. Shivakumara
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
R. Venkatesh, S. Pratibha, N. Dhananjaya, S. R. Manohara, G. Nagaraju
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
R. Lokesh, S. Pratibha, N. Dhananjaya, S. R. Manohara, K. H. Sudheer Kumar
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
H. R. Raveesha, M. S. Sudhakar, S. Pratibha, C. R. Ravikumara, H. P. Nagaswarupa, N. Dhananjaya
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
S. Pratibha, N. Dhananjaya, R. Lokesh
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
N. Dhananjaya, S. R. Yashodha, C. Shivakumara
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
S. Pratibha, N. Dhananjaya, C. R. Manjunatha, Anjana Narayana
MATERIALS RESEARCH EXPRESS
(2019)
Article
Engineering, Electrical & Electronic
S. R. Yashodha, N. Dhananjaya, S. R. Manohara, H. S. Yogananda
Summary: The study presents the synthesis, crystal structure, photoluminescence properties, electrical properties, and color coordinates of La1-xEuxOCl phosphor. Results indicate the potential application prospects of the phosphor in terms of radiative properties and color coordinates.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)