Article
Engineering, Electrical & Electronic
D. Shanmukha Sai, K. Swapna, K. Deepthi, J. V. Shanmukh Kumar, Sk Mahamuda, M. Venkateswarlu, P. Sruthi, D. Amer, A. S. Rao
Summary: Antimony-lead-oxyfluoroborate glasses doped with Eu3+ ions were studied for their luminescence properties, showing suitability for visible red light-emitting device applications.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yasha Tayal, A. S. Rao
Summary: A series of optically translucent borosilicate glasses activated with various concentrations of Dy3+ ions were fabricated and their radiative properties were calculated using Judd-Ofelt analysis, showing potential emission peaks in the visible region. These glasses exhibit potential applications as photonics devices, with emission peaks at visible wavelengths and good CIE coordinate proximity to white light.
Article
Materials Science, Multidisciplinary
Mohit Kumar, A. S. Rao
Summary: Lithium bismuth alumino borosilicate (LiBiAlBSi) glasses doped with various concentrations of trivalent terbium (Tb3+) ions were prepared and characterized for their physical, optical, and photoluminescence features. The study revealed the potential application of these glasses as green emitting components in photonic devices, with controlled and optimized photoluminescence characteristics.
Article
Chemistry, Physical
P. Sruthi, K. Swapna, J. V. Shanmukh Kumar, Sk. Mahamuda, M. Venkateswarulu, D. Amer, D. Shanmukha Sai, A. S. Rao
Summary: Dysprosium-doped antimony lead oxufluoroborate glasses with different concentrations were synthesized and studied for their utility in photonic device applications. The glasses showed promising optical properties and thermal stability, making them potential candidates for white Light Emitting Diodes (w-LEDs) and visible lasers.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Chen Wen-Tong
Summary: The novel holmium-mercury compound synthesized through a hydrothermal reaction exhibits unique characteristics such as crystal structure in monoclinic system, upconversion green emission in solid-state photoluminescence, and a wide optical band gap of 3.26 eV in solid-state UV-visible diffuse reflectance spectrum.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Rongqing Jiang, Hanwei Wu, Kai Li, Wenchao Zhang, Yunlan Guo, Jing Wang, Chao Liu
Summary: In this study, the influence of Na2O concentration on the precipitation of CdSe quantum dots (QDs) in glasses is investigated. It is found that higher Na2O concentration leads to decreased connectivity and solubility of Se in the glass, resulting in the formation of Se-related clusters and lower temperature for the precipitation of CdSe QDs. In glasses with lower Na2O concentration, defect-related photoluminescence (PL) is suppressed and the overall PL changes from dual band to narrow band with tunable wavelength in the visible range. Glasses with higher Na2O concentration only exhibit dual band PL due to phase separation during high temperature heat-treatment. These results demonstrate that the PL properties of QDs in glasses can be modulated by adjusting the glass composition and structure.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Ataullah, I. Khan, S. Khattak, M. Shoaib, J. Kaewkhao, I. Ullah, G. Rooh
Summary: This study reports the radiative, physical, optical, and luminescence properties of glasses with compositions TeO2-BaO-Li2O-GeO2:Sm2O3. The emission spectra showed four emission peaks at specific wavelengths, with the highest emission intensity observed at 1.0 mol% Sm3+ ion concentration. Non-radiative energy transfer was identified as the main cause of the decrease in emission intensity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Mengqi Lin, Xizhen Zhang, Lizhu Guo, Yuhang Zhang, Ruixin Song, Sai Xu, Huichao Zhu, Chuanhui Cheng, Yongze Cao, Yichao Wang, Baojiu Chen
Summary: Blue and green light emitting CsPbBr3 and CsPb(Cl/Br)(3) perovskite quantum dots glasses have been fabricated with adjustable emission wavelengths and high photoluminescence quantum yield. As the Cl/Br ratio increases, the emission lifetime decreases, the average lifetime decreases, and the photoluminescence quantum yield also significantly decreases. Temperature dependence of PL spectra shows a decrease in integrated intensity with increasing temperature, while emission peak wavelength and FWHM remain almost unchanged.
Article
Materials Science, Multidisciplinary
Kartika Maheshwari, A. S. Rao
Summary: This study prepared dysprosium-activated barium zinc lithium phosphate glasses and investigated their structural, optical, and radiative characteristics. The results showed that the doped glasses exhibited good optical properties and thermal stability, making them suitable for applications in photonic devices such as lasers and white-light emitting diodes.
Article
Materials Science, Multidisciplinary
Vidhi, Ankita, Anu, A. S. Rao
Summary: This study presents a detailed spectroscopic analysis of dysprosium ions doped ZnAlNaP glasses, demonstrating their potential for epoxy-free white-light emitting diodes (w-LEDs).
Article
Materials Science, Ceramics
A. S. Rao Ravita
Summary: Potassium Zinc Alumino Borosilicate (KZABS) glasses doped with Tm3+ ions were prepared and investigated for their optical properties. The glasses exhibited blue and red luminescence under different excitation wavelengths, indicating their potential for use in photonic devices.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Spectroscopy
M. Dhavamurthy, P. Vinothkumar, Manoj Mohapatra, Antony Suresh, Priya Murugasen
Summary: Ce3+/Dy3+ and Ce3+/Sm3+ co-doped alumino-borophosphate glasses were studied for their optical properties, luminescence behavior, and composition using FT-IR, FT-Raman, UV-Vis, and SEM/EDS techniques. The luminescence spectra showed emission peaks corresponding to Dy3+ and Sm3+ ions in the glasses, with CSABP glass emitting white light. The SHG efficiency of the glasses was determined and compared to reference samples without the need for a thermal polling mechanism.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Physical
Eluri Pavitra, Ganji Seeta Rama Raju, Ganji Lakshmi Varaprasad, Nilesh R. Chodankar, M. V. Basaveswara Rao, N. Madhusudhana Rao, Jin Young Park, Young-Kyu Han, Yun Suk Huh
Summary: In this study, highly photostable and novel Gd2TiO5(GT):Dy3+/Eu3+ nanophosphors were reported as single-component white emitting phosphors prepared by sol-gel route. Tunable white light emission was achieved by co-doping various concentrations of Eu3+ ions to the optimized GT:1.5Dy(3+) nanophosphors, showing an increased energy transfer efficiency with rising Eu(3+) ion content for co-doped GT nanophosphors. The results suggest that these GT:Dy3+/Eu3+ nanophosphors can serve as potential single-component white emitting phosphors for UV and/or NUV-based pc-WLEDs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
P. Evangelin Teresa, R. Divina, K. A. Naseer, K. Marimuthu
Summary: In this study, Dy3+-activated alkali borotellurite glasses with exclusive modifiers were fabricated and their structural, molecular, spectroscopic, and radiative characteristics were investigated. The results showed that the prepared glasses exhibited lasing capability, with the zinc-containing glass (BTZNKD) showing higher performance in white light LED applications for medical diagnosis.
Article
Materials Science, Multidisciplinary
Naresh Varnakavi, Kiran Gupta, Kyunghoon Lee, Jiwoong Yang, Pil-Ryung Cha, Nohyun Lee
Summary: Compositional engineering of CsPbBr3 perovskite nanocrystals (PNCs) through Zn(ii) doping is an effective strategy to enhance their stability, defect passivation, and photoluminescence (PL) efficiency. Doping ZnBr2 gradually transforms CsPbBr3 into Cs4PbBr6 and introduces additional Br- ions, leading to the inhibition of surface defects and improvement of PL quantum yield. Experimental characterization techniques reveal that ZnBr2 doping suppresses nonradiative carrier trapping centers and generates shallow energy states, facilitating radiative recombination. The temperature-dependent studies demonstrate that temperature changes can influence radiative recombination and de-trapping processes.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
P. Sruthi, K. Swapna, J. V. Shanmukh Kumar, Sk. Mahamuda, M. Venkateswarulu, D. Amer, D. Shanmukha Sai, A. S. Rao
Summary: Dysprosium-doped antimony lead oxufluoroborate glasses with different concentrations were synthesized and studied for their utility in photonic device applications. The glasses showed promising optical properties and thermal stability, making them potential candidates for white Light Emitting Diodes (w-LEDs) and visible lasers.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Materials Science, Ceramics
S. K. Mahamuda, P. Sailaja, K. Swapna, M. Venkateswarlu, A. S. Rao
Summary: Europium-doped Oxy-Fluoro-Borate glass samples were synthesized through the melt-quench mechanism, with Judd-Ofelt parameters evaluated from PL spectra. All glasses exhibited intense peaks in the reddish region at 612 nm, with OFBEu20 glass considered a good optical material for red color laser emission.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Engineering, Electrical & Electronic
D. Shanmukha Sai, K. Swapna, K. Deepthi, J. V. Shanmukh Kumar, Sk Mahamuda, M. Venkateswarlu, P. Sruthi, D. Amer, A. S. Rao
Summary: Antimony-lead-oxyfluoroborate glasses doped with Eu3+ ions were studied for their luminescence properties, showing suitability for visible red light-emitting device applications.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Optics
A. Kumar, M. K. Anu, M. K. Sahu, Nisha Ravita, S. Dahiya, Nisha Deopa, Anand Malik, R. Punia, A. S. Rao
Summary: In this study, Zinc Potassium Alumino fluoroborate (ZKAlFB) glasses doped with different concentrations of Terbium ions (Tb3+) were synthesized using the melt-quench technique. The spectroscopic properties of the glass samples were examined using various characterization techniques. It was found that 1 mol% Tb3+ ion concentration showed the highest photoluminescence intensity and demonstrated superiority in fabricating photonic devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
V. Murali Krishna, S. K. Mahamuda, P. Sailaja, K. Swapna, M. Venkateswarlu, Ch B. Annapurna Devi, A. S. Rao
Summary: In this study, Nd3+ ion-doped Oxy-Fluoro Boro Tellurite (OFBT) glasses were prepared and their luminescence characteristics were investigated. The results showed that OFBTNd10 glass had a high stimulated emission cross-section and could potentially function as a good optical gain material for producing laser at around 1064 nm.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Manjeet, A. Kumar, Anu, Ravina, Nisha Deopa, Anand Kumar, R. P. Chahal, S. Dahiya, R. Punia, A. S. Rao
Summary: This study evaluates and analyzes the physical, structural, thermal, and optical properties of Dy3+-doped glasses. The results show the potential application of these glasses in optoelectronic devices such as lasers and white light-emitting diodes (w-LEDs).
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
A. Heera Durga Prakash, Sk Mahamuda, Jamila S. Alzahrani, P. Sailaja, K. Swapna, M. Venkateswarlu, A. S. Rao, Z. A. Alrowaili, I. O. Olarinoye, M. S. Al-Buriahi
Summary: In this study, a series of glass samples with different compositions were prepared and investigated for their structural, physical, optical, and radiation properties. The addition of Dy2O3 was found to increase the mass attenuation coefficient and charged particles absorption capacity of the glasses. These synthesized glasses demonstrated key characteristics for optical and radiation protection applications.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Inorganic & Nuclear
V. R. L. Murty, M. Venkateswarlu, K. Swapna, Sk Mahamuda, P. Rekha Rani, A. S. Rao
Summary: In this study, alumino tungsten borate glasses doped with dysprosium ions were characterized using spectroscopic techniques. The results showed that these glasses have significant applications in photonic devices, visible solid state lasers, and other fields. The glasses exhibited white light emission, making them suitable for the fabrication of white LEDs and lasers.
Article
Optics
P. Sailaja, Sk Mahamuda, K. Swapna, M. Venkateswarlu, A. S. Rao
Summary: This paper reports on the preparation and characterization of Neodymium (Nd3+) ions doped Oxy Chloro Boro Tellurite (OCBT) glasses. The influence of Nd3+ ions concentration on the physical, absorption, emission, and decay properties of OCBT glasses were investigated. The study provides valuable information on the radiative properties and quantum efficiency of the glasses, demonstrating the potential applications in solid state lasers technology and other laser applications.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Ravina Lohan, A. Kumar, Mukesh K. Sahu, Anu Mor, V. Kumar, Nisha Deopa, A. S. Rao
Summary: A series of white-light-emitting strontium niobium oxide phosphors were synthesized and analyzed for their optical luminescence characteristics. The phosphors exhibited a cubic structure and heterogeneous microstructures were observed. Absorption and photoluminescence spectra were evaluated, revealing two peaks corresponding to specific transitions of the dopant ions. The phosphors showed excellent thermal stability and were considered promising for lighting and luminescent devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Manjeet, A. Kumar, Anu, Ravina Lohan, Nisha Deopa, Anand Kumar, R. P. Chahal, S. Dahiya, R. Punia, A. S. Rao
Summary: This work investigates the impact of trivalent samarium (Sm3+) ions concentrations on various characteristics in Zinc Sodium Lead Borate (ZnNaPbB) glasses. The synthesized glasses were characterized using spectroscopic methods and were found to have potential applications in photonics.
Article
Chemistry, Physical
C. Sumalatha, Ramachari Doddoji, M. Venkateswarlu, K. Swapna, S. K. Mahamuda, A. S. Rao
Summary: Borotellurite (ZnBiBaBFTe: ZnO + Bi2O3 + BaF2 + B2O3 + TeO2) glasses were fabricated by varying Tb2O3 concentration via the conventional melt and rapid quenching process. The glass stability (150 degrees C) and thermal stress (0.336) were evaluated using the differential thermal analysis. The rising value in the molar volume (39.69-43.86 cm3/mol) and field strengths (6.69-19.41 x 1015 cm- 2) was due to the decrease in the density (2.932-2.804 gm/cm3) and inter-atomic distances (5.25 -3.08 angstrom) of Tb3+ ions in ZnBiBaBFTe glasses.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ashima Makhija, Anjli Sharma, Sajjan Dahiya, Nisha Deopa, Rajesh Malik, R. Punia, A. S. Maan
Summary: A series of Ce3+ doped La1-xCexAlO3/MgO (x = 0, 0.7, 0.9, 1.0 and 2.0 mol%) nano-composites were successfully synthesized using the Pechini sol-gel method. The XRD profiles confirmed the rhombohedral/face-centered structures of the composite. The materials exhibited wide band gap semi-conducting properties with a range of 5.5-5.8 eV. Photoluminescence studies showed green emission under UV excitation of 272 nm. The optimized nano-composite (La1-xCexAlO3/MgO with x = 0.9 mol%) was found to be suitable for latent fingerprinting applications.
Article
Chemistry, Multidisciplinary
Kanishk Poria, Ravina Lohan, Sanjana Bhatia, Amit Kumar, Rajwinder Singh, Nisha Deopa, Rajesh Punia, Jangvir Singh Shahi, A. S. Rao
Summary: Investigation on Dy3+ doped Na3Ba2LaNb10O30 phosphors was performed, exploring their structural, morphological and luminescent characteristics. The optimal Dy3+ concentration was determined and the energy transfer mechanism was studied. The obtained phosphors exhibited high IQE and brightness, making them suitable for w-LED applications.
Article
Chemistry, Inorganic & Nuclear
Mahsa Saberian, Alireza Nezamzadeh-Ejhieh
Summary: CuO was successfully supported on clinoptilolite nanoparticles (NCP) via ion exchange and calcination, forming CuO-NCP photocatalysts. CuO-NCP exhibited enhanced photocatalytic activity towards tetracycline (TC), and the best degradation performance was achieved under optimal conditions (25 ppm TC solution, pH 4.8, and 0.5 g/L catalyst).
SOLID STATE SCIENCES
(2024)