Article
Materials Science, Multidisciplinary
Isha Charak, M. Manhas, A. K. Bedyal, Ankush Vij, H. C. Swart, Vinay Kumar
Summary: Undoped and Dy3+-activated Sr2B2O5 phosphors were synthesized and annealed to improve crystallinity. The phosphors exhibited characteristic peaks in the UV and near UV regions and emitted blue, yellow, red, and brownish red light. The addition of dopant ions increased the optical bandgap values and the average lifetime of the phosphors was determined to be 0.78 ms. The prepared phosphors are considered promising candidates for use in yellow light emitting W-LEDs.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Sheetal Kumari, A. S. Rao, R. K. Sinha
Summary: This study investigated the structure, morphology, optical and spectroscopic characteristics of Sm3+/Eu3+ co-doped Sr9Y2W4O24 phosphors. It was found that the addition of Eu3+ ions increased the emission intensity while decreasing the emission intensity of Sm3+ ions, and the energy transfer mechanism from Sm3+ to Eu3+ ions was revealed. With increasing concentration of Eu3+ ions, the calculated CIE parameters gradually shifted towards the red region, and the phosphor exhibited good thermal stability.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Materials Science, Multidisciplinary
Pooja Khajuria, Vishav Deep Sharma, Rubby Mahajan, Ram Prakash, R. J. Choudhary
Summary: This article investigates the influence of doping Sm3+ ions in the Ba3Zr2O7 host lattice. Ba3(1-x)Zr2Sm3xO7 samples with different Sm3+ concentrations were prepared using a solution combustion route. XRD and XPS techniques were employed to study the structure and chemical compositions of the phosphor. The results showed that Sm3+ doping significantly affected the luminescence spectra of Ba3Zr2O7 phosphor, making it a promising candidate for amber gap filling in LEDs.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Optics
Vishav Deep Sharma, Pooja Khajuria, Ram Prakash, R. J. Choudhary
Summary: This research article focuses on the synthesis and characterization of Na(1_ x)Zr2Smx(PO4)(3) (x = 0.005-0.05) phosphors. The phase purity, lattice parameters, chemical states, and morphology of the synthesized phosphors were thoroughly investigated. The study identified a strong characteristic emission from Sm3+ ions and extensively explored the effect of doping concentration on the photoluminescence spectra. The bandgap of the phosphors was measured and found to be in the range of 4.25 - 4.56 eV.
Article
Biochemical Research Methods
R. M. Yerojwar, N. S. Kokode, C. M. Nandanwar, D. K. Ingole, G. R. Nimbarte
Summary: The combustion procedure was used to synthesize Bi2Al4O9:Eu3+ phosphors. The XRD patterns showed an orthorhombic crystal structure. Maximum excitation intensity was obtained at 395 nm, leading to two emission peaks at 593 and 615 nm. Concentration quenching occurred at 0.5 mol% Eu3+ ions. The CIE coordinates for Bi2Al4O9:Eu3+ phosphor were 615 nm (x = 0.680, y = 0.319), falling in the red region. According to the photoluminescence results, Bi2Al4O9:Eu3+ phosphors could be useful in the fields of near UV-excited w-LEDs.
JOURNAL OF FLUORESCENCE
(2023)
Article
Engineering, Electrical & Electronic
Vishav Deep Sharma, Pooja Khajuria, Ram Prakash, R. J. Choudhary
Summary: This article reports the successful synthesis of high-purity NaZr2(PO4):Eu3+ phosphate phosphor by solution combustion synthesis which emits in the reddish region. The structural, vibrational, elemental composition, electronic, and optical characteristics of the synthesized phosphor were analyzed using various measurements. The phosphor showed emission in the visible area due to the magnetic dipole transition of the Eu3+ ions, and it exhibited a high color purity of 94% in the reddish region. These findings suggest that the phosphor could be suitable for various optoelectronic devices, including phosphor-converted whitelight-emitting diodes.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Applied
Jinkai Li, Bin Liu, Guiyuan Liu, Quande Che, Yizhong Lu, Zongming Liu
Summary: Uniform Sr2NaMg2V3O12:xEu phosphors with good dispersion were synthesized via solid state reaction. The phosphor exhibited blue-green and red emission under appropriate excitation wavelength. The emission intensity of [VO4]3- decreased while the emission intensity of Eu3+ increased with the increase of Eu3+ content. The phosphor also showed good thermal stability.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Analytical
Sadaf Gauhar M. Mushtaque, V. B. Pawade, S. J. Dhoble
Summary: This work presents optimized luminescence spectra for Ce3+, Sm3+-doped NaSrPO4 phosphor synthesized through a wet chemical method. The impurities Ce3+ and Sm3+ exhibit spectral splitting bands corresponding to d-f and f-f transitions, respectively, when doped in the NaSrPO4 host lattice. The emission bands observed in the Ce3+ excitation range were located at 269 nm, 292 nm, and 321 nm, with a broad spectral range of 330-430 nm. On the other hand, when Sm3+ ions were doped in the same host lattice, characteristic emission bands appeared at 590 nm and 645 nm in the orange-red region, under sharp excitation bands located at 345 nm, 361 nm, 375 nm, and 403 nm, respectively. Energy transfer analysis was also carried out for Ce3+/Dy3+-doped NaSrPO4 phosphor. Further characterization using X-ray diffraction and transmission electron microscopy confirmed the crystalline phase and nanophase nature of the phosphor compound.
Article
Materials Science, Multidisciplinary
Parwinder Kaur, Anumeet Kaur, Surinder Singh, Lakhwant Singh
Summary: The study synthesized MgO:Li luminophors and investigated their potential applications in WLEDs and radiation dosimetry. Results showed that 1 mol% dopant concentration is optimal for fluorescence intensity, and CIE coordinates indicated the suitability of the samples for WLED applications. The study also explored the structural, morphological, and luminescent properties of the samples.
Article
Chemistry, Physical
Mashooq A. Wani, Shubhangi A. Athawale, R. M. Belekar
Summary: The present study successfully synthesized two new centrosymmetric pyrophosphates Li2MgP2O7:Eu3+ and ZnMgP2O7:Eu3+ compounds by the wet-chemical method. The structures and phase purities of these compounds were confirmed by XRD analysis and FT-IR. These compounds exhibit strong optical absorption over a wavelength range of 200-800 nm, and their photoluminescence emission spectra reveal their structural characteristics and potential commercial applications.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Ceramics
Bingjie Han, Jing Ren, PingPing Teng, JiaBao Zhu, Yu Shen, ZhiAng Li, Xiaoliang Zhu, Xinghua Yang
Summary: A new type of CLSO:Sm3+ phosphor was prepared by the high-temperature solid-phase method in this study, showing potential application value in the field of w-LEDs. The phosphor exhibited good luminescent properties under blue light excitation, making it a promising material for w-LEDs applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Li Zhou, Haoran Su, Changlin Li, Ruiqi Yang, Yufan Shang, Chaoyue Wang, Jingjing Lian, Shouan Xie, Xiaohui Ji, Ruijin Yu
Summary: This research synthesized a series of NaGdMg-TeO6:xSm3+ phosphors with a double perovskite structure using solid-state reaction methods. The crystal structure, phase purity, photoluminescence properties, concentration quenching mechanism, color purity, thermal stability, and inner quantum efficiency of the samples were systematically studied. The NaGdMgTeO6:Sm3+ phosphors exhibited strong red emission at 648 nm under 405 nm excitation, with the optimal luminescence intensity achieved at a dopant concentration of 1 mol%. The phosphors showed high color purity, thermal stability, and activation energy. The fabricated red LED showed superior spectral matching with Phytochrome Pr, and the w-LED had a high color rendering index and a suitable correlated color temperature. These phosphors have potential applications in plant growth LEDs and w-LEDs.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Condensed Matter
Wasim Tahir, Muhammad Azhar Khan, Raqiqa Tur Rasool, Shadab Dabagh, Shagufta Gulbadan, Abdul Majeed, Hind Albalawi, S. Bouzgarrou, Khalid Mahmood
Summary: The structural, optical, dielectric, and magnetic characteristics of Sr-Ni-W hexaferrites were investigated to demonstrate their potential applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Monika Duhan, Shashank Bharadwaj, Anita Gupta, Harminder Kaur
Summary: This study reports the defect induced room temperature ferromagnetism (RTFM) in (La, Gd) codoped SnO2 nanostructures prepared by sol-gel method. The observed RTFM is mainly attributed to the presence of oxygen vacancies, which is supported by Photoluminescence (PL) measurements showing emissions associated with vacancies/defects.
Article
Chemistry, Physical
Xuan Ouyang, Ruiyuan Liu, Xiaopeng Hu, Ju Li, Rong Tang, Xiaoyue Jin, Shigao Chen, Xuemei Yao, Bin Deng, Huiling Geng, Ruijin Yu
Summary: Eu3+-doped Ca2InTaO6 phosphors were synthesized and characterized for their crystal structure, composition, phase purity, photoluminescence properties, and thermal quenching mechanism. The Ca2InTaO6 lattice showed an orthorhombic structure and exhibited red emission at 613 nm when excited at 395 nm. The optimal doping concentration was found to be x = 0.40 with a color purity of 99.9%, an internal quantum efficiency of 90.69%, and a thermal activation energy of 0.36 eV. The prepared w-LED showed satisfactory color rendering index, correlation color temperature, and CIE coordinates. The Ca2InTaO6:Eu3+ phosphor also demonstrated clear reflection of latent fingerprint characteristics. These results indicate the potential application of Ca2InTaO6:Eu3+ phosphor in w-LED production and LFP detection.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
V. B. Pawade, R. L. Kohale, D. A. Ovhal, N. S. Dhoble, S. J. Dhoble
Article
Chemistry, Analytical
Digambar A. Ovhal, Bandana Samant, N. S. Dhoble, D. M. Mohabey, S. J. Dhoble
Article
Chemistry, Physical
C. M. Mehare, N. S. Dhoble, Chandan Ghanty, S. J. Dhoble
Summary: The study reported the synthesis of Dy(3+)-activated CaAl2Si4O12 phosphor using combustion techniques, showing excellent luminescence performance suitable for white light emitting diodes. Thermoluminescence characterization indicated potential applications of the phosphor.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Analytical
C. M. Mehare, M. D. Mehare, C. Ghanty, N. S. Dhoble, S. J. Dhoble
Summary: A trivalent Dy3+-activated K3Ca2(SO4)(3)F fluoride-based phosphor was synthesized and characterized for its thermoluminescence application, showing maximum TL intensity at 1 mol% Dy3+ ion doping. The synthesized phosphor exhibited excellent TL properties and is a potential candidate for dosimetric applications, with a prominent single TL glow peak at 278 degrees C.
Review
Chemistry, Analytical
Sanjay J. Dhoble, Ruby Priya, N. S. Dhoble, O. P. Pandey
Summary: This review article discusses the recent progress on Mn-doped oxides for indoor plant growth, focusing on the synthesis conditions, luminescent properties, and fabrication of LEDs for plant growth applications.
Article
Chemistry, Analytical
Arati Duragkar, N. S. Dhoble, Abhijeet R. Kadam, S. J. Dhoble
Summary: In this study, RE3+ (Eu, Ce and Sm)-activated Ca-10(PO4)(6)F-2 phosphors were synthesized by doping with different apatite minerals using a solid-state diffusion method. The phosphors showed promising potential as candidates for white light-emitting diode materials after enhancing luminescence intensity through tuning host matrices.
Article
Nuclear Science & Technology
Nahida Baig, Abhijeet R. Kadam, Kena Dubey, N. S. Dhoble, S. J. Dhoble
Summary: The study synthesized novel RE-doped Na3Ca2(SO4)(3)Cl phosphors using wet chemical method. Analysis of structure and morphology was conducted using X-ray diffraction and scanning electron microscopy, showing crystallization in a well-known structure. Different emission bands were observed for Dy3+ and Ce3+ doping, while Eu emission showed characteristic intensity with specific excitation and emission transitions.
RADIATION EFFECTS AND DEFECTS IN SOLIDS
(2021)
Article
Nuclear Science & Technology
Kena Dubey, Abhijeet R. Kadam, Nahida Baig, N. S. Dhoble, S. J. Dhoble
Summary: In this study, terbium (III) ion-doped sodium calcium chlorosulfate phosphor was prepared via wet chemical method and analyzed using XRD and SEM. The sample showed crystallization in a known structure and the XRD study confirmed its crystalline nature at low temperature. Photoluminescence analysis revealed strong emissions in the green region due to terbium (III) ion doping, with excitation at 380 nm and emissions at 545 nm being particularly significant.
RADIATION EFFECTS AND DEFECTS IN SOLIDS
(2021)
Article
Chemistry, Physical
Digambar A. Ovhal, Vibha Chopra, N. S. Dhoble, S. J. Dhoble
Summary: In this study, sodium aluminosilicates NaAlSi2O6: Dy and Na6Al6Si10O32: Eu were synthesized and their thermoluminescence properties were investigated. Both phosphors exhibit similar TL glow peaks and linear TL response within a specific range of ion fluence. The trapping parameters of the samples were analyzed and found to have good agreement, suggesting potential applications in radiation dosimetry.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Analytical
Arati Duragkar, Nirupama S. Dhoble, Ritesh L. Kohale, Sanjay J. Dhoble
Summary: This study synthesized KNa(SO4) phosphors doped with different concentrations of rare earth Eu3+, Sm3+, and Dy3+ ions using a solid-state diffusion technique, selecting rare earth ions with the highest PL intensity for anionic exchange. The selected phosphors showed potential for enhancing white light emission in LEDs, especially in the red, green, blue, and yellow regions.
Article
Nuclear Science & Technology
M. D. Mehare, C. M. Mehare, N. S. Dhoble, S. J. Dhoble
Summary: A series of Mn2+ single doped fluoride-based K3Ca2(SO4)(3)F phosphor was prepared by high temperature solid-state reaction method. Characterization of phase purity and morphology was studied using XRD and SEM analyses. The synthesized phosphor showed potential for radiation dosimetry applications.
RADIATION EFFECTS AND DEFECTS IN SOLIDS
(2021)
Article
Nuclear Science & Technology
Nahida Baig, N. S. Dhoble, Yatish R. Parauha, Meenal Joshi, S. J. Dhoble
Summary: This study reported the thermoluminescence properties and trapping parameters of Eu3+ and Dy3+-doped K3Ca2(SO4)(3)Cl phosphors. The synthesized phosphors showed simple glow curves with isolated peaks and exhibited linear TL response in specific dose ranges. These phosphors are considered potential candidates for thermoluminescence dosimetry and image storage due to their efficient dose response and low fading characteristics.
RADIATION EFFECTS AND DEFECTS IN SOLIDS
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Prashantkumar Shinde, Anand Jadhav, V. Shankar, Karan Kumar Gupta, Nirupama S. Dhoble, Sanjay Dhoble
Summary: This study evaluated the dosimetric impact of Hounsfield unit variations in kilovoltage cone-beam computed tomography (kV-CBCT) based 3D dose calculation accuracy in the treatment planning system and validated the potential feasibility of kV-CBCT for treatment plan 3D dose reconstruction in clinical decision making for Adaptive radiotherapy in Head and Neck cancer.
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS
(2022)
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
Optics
Sonal P. Tatte, Yatish Parauha, N. S. Dhoble, G. C. Mishra, S. J. Dhoble
Summary: The influence of rare earth ions on the photoluminescence properties of self-emitting KCa2Mg2(VO4)3 phosphors was studied. The structural, vibrational, and luminescence properties were investigated for doped and undoped phosphors. The results showed a relationship between the emission intensity and the concentration of dopant ions, as well as energy transfer behavior between VO43- and Eu3+. The findings suggest that these phosphors have great potential for future lighting technology.
