Volume-10 , Issue-3 , Jun 2022, ISSN 2348-3423 (Online) Go Back

• Open Access   Article

  Studies of Structural, Optical and Electrical Properties of Pure and l-ornithine Monohydrochloride Doped KDP Crystals

  H. Bhuva, K.V. Vadhel, M.J. Joshi, H.O. Jethva

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.1-14, Jun-2022

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  Abstract
  In the current study, author examines and reports the effect of dopant l-ornithine monohydrochloride (LOMHC) on structural, optical and electrical properties of potassium dihydrogen phosphate (KDP) crystal. The slow solvent evaporation technique is used to grow the crystals. Good grade, transparent, and rectangular crystals are achieved after approximately 4 weeks. The grown crystals are characterized by powder X, SHG, UV-Vis, impedance, modulus, dielectric and conductivity analysis. The powder X analysis shows single phase nature of the doped crystals with increase in crystallite size and lattice strain. The doped KDP crystals show NLO behavior with reduction in SHG efficiency. The UV-Vis analysis shows reduction in transmittance % and band gap energy of doped KDP crystals. Complex impedance and modulus analysis show the dominancy in polarization mechanism in all the samples due to bulk effect arising in the grains. The scaling behavior of modulus demonstrates the reliance of relaxation dynamics on doped LOMHC concentration. The dielectric behavior of pure and LOMHC doped KDP shows normal behavior. The ac conductivity obeys the Jonscher’s power law and ideal long-range pathways and diffusion limited hopping process in pure and LOMHC doped KDP crystals.

  Key-Words / Index Term
  KDP, Powder XRD, SHG, UV-Vis, electrical analysis

  References
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  Citation
  H. Bhuva, K.V. Vadhel, M.J. Joshi, H.O. Jethva, "Studies of Structural, Optical and Electrical Properties of Pure and l-ornithine Monohydrochloride Doped KDP Crystals," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.1-14, 2022

• Open Access   Article

  Incidence Angle Sensitive Broadband Metamaterial Perfect Absorber

  Vimlendu Vatsayan, Puja Kumari, Deepak K.S. Ambast

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.15-18, Jun-2022

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  Abstract
  In this paper a novel configuration of metamaterial perfect absorber (MMPA) is proposed to enhance the spectral broadband performance. A combination of squares and circles of Au structures made on Si are used for the purpose. An Au thin layer at the bottom is used to minimize the transmission through the MMPA. The observed strong absorbance are due to the overlap between TE and TM polarization states from 250 nm to 600 nm and 1100 nm to 1700 nm. The design is validated by measuring the reflectance, transmittance and absorbance at different angle of incidence of source using Lumerical FDTD commercial software. Results show incidence angles sensitive broadband MMPA.

  Key-Words / Index Term
  Absorbance, Broadband, Metamaterial Perfect Absorber (MMPA), Lumerical FDTD, Solar Band

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  Citation
  Vimlendu Vatsayan, Puja Kumari, Deepak K.S. Ambast, "Incidence Angle Sensitive Broadband Metamaterial Perfect Absorber," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.15-18, 2022

• Open Access   Article

  Growth and characterization of pure and l-ornithine monohydrochloride doped ADP crystals

  K.V. Vadhel, V.J. Pandya, M.J. Joshi, H.O. Jethva

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.19-25, Jun-2022

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  Abstract
  In the present study, growth and various characterizations of pure and different wt% l-ornithine monohydrochloride (LOMHCl) doped ammonium dihydrogen phosphate (ADP) crystals are reported. The slow solvent evaporation method at room temperature is used to grow these crystals. After nearly 25 days, good quality, transparent and rectangular crystals are obtained. The grown crystals are analyzed by CHN, EDAX, FTIR, thermal and PL characterizations. EDAX and CHN analysis confirms the presence of dopant atoms. The EDAX analysis shows gradual increase in the weight% of carbon (C) and chlorine (Cl) in LOMHCl doped ADP crystals. The presence of all constitutive functional groups of ADP in pure and LOMHCl doped ADP crystals is confirmed by FT-IR spectra. The doping of LOMHCl in ADP gives rise to small shift in some of the characteristic vibrational frequencies. The thermo-gram of pure and different wt% LOMHCl doped ADP suggests slight increase in thermal stability of doped ADP crystals as well as shows reduction in the weight loss % of pure ADP at the end of first and second decomposition stages. It is observed from the thermal analysis that the presence of dopant LOMHCl prevents pure ADP to decompose into gaseous products. The PL study shows L-defect and D-defect. The doping of LOMHCl shows reduction in PL emission spectra and increase in Stokes shift value.

  Key-Words / Index Term
  ADP, EDAX, FTIR, thermal analysis, PL

  References
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  Citation
  K.V. Vadhel, V.J. Pandya, M.J. Joshi, H.O. Jethva, "Growth and characterization of pure and l-ornithine monohydrochloride doped ADP crystals," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.19-25, 2022

• Open Access   Article

  Analysis of the Null Geodesics in Schwarzschild De-Sitter Space-Time

  S.K. Saurav, A.R. Ghimire, B.S. Shahi, Y. Rana, R. Paudel, Y.S. Maharjan

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.26-31, Jun-2022

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  Abstract
  The gravitational field of a spherically symmetric mass in a universe with cosmological constant (?) is described in terms of Schwarzschild de-Sitter (SdS) space-time. Based on this space-time we investigated the geodesics of a test particle- photon. We performed our study on the space-time in between the cosmological event horizon and black hole event horizon i.e. rH < r < rC and also imposed E2 > Veff for the physical acceptance. We detected two types of orbits, namely periodic bound orbit and terminating bound orbit. The mathematical conditions for the existence of these orbits have been discussed. We found that there will no longer be any periodic bound orbits for a large positive cosmological constant. The analysis of effective potential inferred us that only the peak of the curve changes for change in angular momentum (L). These peaks correspond to circular orbits in null geodesics and a circular orbit of radius 3M becomes an allowed null geodesic.

  Key-Words / Index Term
  SdS space-time, Photon, Effective potential, Orbits, Cosmological constant

  References
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  Citation
  S.K. Saurav, A.R. Ghimire, B.S. Shahi, Y. Rana, R. Paudel, Y.S. Maharjan, "Analysis of the Null Geodesics in Schwarzschild De-Sitter Space-Time," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.26-31, 2022

• Open Access   Article

  Superposition Model Calculation of Cr3+ Doped EuAl3 (BO3)4

  Ram Kripal

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.32-36, Jun-2022

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  Abstract
  Superposition model (SPM) is used to calculate zero field splitting (ZFS) parameters (ZFSPs) and crystal field parameters (CFPs) of Cr3+ doped EuAl3(BO3)4 (EAB). Substitutional and interstitial sites for Cr3+ ion in EAB crystal and distortion are taken into account for calculation. The determined ZFSPs are in reasonable agreement with the experimental values when distortion is taken into account. The optical energy band positions for Cr3+ in EAB are found using CFPs obtained from SPM and CFA package. The results suggest that Cr3+ ions substitute EAB lattice at Al3+ sites.

  Key-Words / Index Term
  Superposition model; Crystal field: zero-field splitting; Optical spectroscopy; Cr3+ ions in EAB.

  References
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  Citation
  Ram Kripal, "Superposition Model Calculation of Cr3+ Doped EuAl3 (BO3)4," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.32-36, 2022

• Open Access   Article

  To Investigate the Structural and Optical Characteristics of an Optimal Host-Material for its Entrepreneurship in Various Applications

  S.K. Dubey, S. Sharma

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.37-41, Jun-2022

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  Abstract
  Un-doped Ba2MgSi2O7 (BMS) sample was successfully synthesized via low temperature combustion synthesis (LCS) method. The phase-purity and crystal structure were identified with the help of powder XRD technique. As a result, the synthesized powder material samples confirm the existence of monoclinic crystal structure with C2/c space group. The obtained XRD pattern was thoroughly clarified with standard JCPDS Card No. 23-0842. The crystal lattice strain (?) is evaluated as 0.29nm and average crystallite size (D) is evaluated as 35nm. FTIR spectroscopy clearly confirmed the actual phase formation of the synthesized powder sample and the existence of different functional groups present. PLE and Emission spectra were also discussed. The prepared phosphor has displayed single emission peak at 462nm wavelength. The CIE chromaticity coordinates have shown that this phosphor approached to greenish-blue luminescent color region. Nowadays, it is being used prominently in this field of solid-state lighting devices, white light emitting diodes, plasma display panel devices, Cancer Therapy, Bone Materials, Bio-Materials, Bone Tissue Engineering and Tissue Engineering applications and at the same time, it is also making an important contribution to DNA transplantation and computer applications for Image processing. In present study, XRD, FTIR, PL analysis and CIE diagram of this phosphor have also discussed.

  Key-Words / Index Term
  X-ray diffraction (XRD), Ba2MgSi2O7 (BMS), Photoluminescence (PL), Monoclinic, Image processing.

  References
  [1] S. Sharma, S. K. Dubey, “The Significant Properties of Silicate Based Luminescent Nanomaterials in Various Fields of Applications: A Review”, International Journal of Scientific Research in Physics and Applied Sciences, Vol. 9, Issue. 4, pp. 37-41, 2021.
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  Citation
  S.K. Dubey, S. Sharma, "To Investigate the Structural and Optical Characteristics of an Optimal Host-Material for its Entrepreneurship in Various Applications," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.37-41, 2022

• Open Access   Article

  Growth and characterization of compound crystal of magnesium sulphate heptahydrate and threonine

  D.B. Mankad, M.J. Joshi, H.O. Jethva

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.42-48, Jun-2022

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  Abstract
  In the present study, growth and various characterizations of compound crystal of magnesium sulphate heptahydrate (MSH) and threonine (THR) are reported. The crystal is grown by a slow solvent evaporation technique. This technique was taken up at the room temperature. After nearly 5 weeks, good quality, transparent and rod shape crystal is obtained.The crystal is characterized by elemental, FTIR, thermal, SHG and UV-Vis analysis. The various properties of the compound crystal are compared with the pure crystal of MSH and THR. The elemental analysis confirms the presence of atoms of pure MSH and THR in the grown compound crystal. The spectra generated from the FTIR dataset confirmed the presence of expected functional groups of MSH and THR in current compound crystal. The thermal analysis of compound crystal shows changes in the thermal profile of pure crystal of MSH and/or THR in terms of different hydrated phases and anhydrous phases. The SHG analysis shows an increase in the efficiency of compound crystal compared to pure THR crystal. The UV-Vis analysis shows the effect of formation of compound crystal in terms of decrease and increase in transparency % of pure crystal of MSH and THR, respectively. The bandgap energy is calculated from the Tauc’s plot, wherein, value of the same was found to increase, as compared to pure THR crystal. All the results are discussed.

  Key-Words / Index Term
  MSH, THR, FTIR, thermal analysis, SHG, UV-Vis

  References
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  Citation
  D.B. Mankad, M.J. Joshi, H.O. Jethva, "Growth and characterization of compound crystal of magnesium sulphate heptahydrate and threonine," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.42-48, 2022

• Open Access   Article

  Synthesis and Solar Cell Application of Dye Sensitized Magnesium Oxide MgO

  A.A. Elbadawi, S. I. Hamza, A.S. Hamed, Y.A. Alsabah

  Research Paper | Journal-Paper (IJSRPAS)

  Vol.10 , Issue.3 , pp.49-54, Jun-2022

  Abstract

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  Abstract
  In this paper semiconductor material from Magnesium Oxide in different molar ratio namely (0.2, 0.4, 0.6, 0.8 and 1.0) were successfully synthesized and crystal violet dye was used to fabricate Dye-Sensitized Solar Cells (DSSCs). This work aimed to study the performance of magnesium Oxide Dye-Sensitized Solar Cells (DSSCs). UV/VIS spectrometer was carried out to determine some optical properties of magnesium Oxide while current –voltage circuit was used to measure the parameters of solar cell. From UV-VIS spectrometer results the absorbance of all samples in range of (190-400) nm, the absorbance decrease when molarity of magnesium Oxide increase, the maximum absorption coefficient value of magnesium Oxide ? = 2.42 x 104 cm-1 for MgO (0.2 molar) sample at wavelength 275 nm, the optical energy band gab was increased from 3.773eV for MgO (0.2 molar) sample to 3.812eV for MgO (1.0 molar) sample. From current –voltage results circuit the values of fill factor is 0.74 and efficiency of solar cells increased from 0.2803% to 0.3409% according to magnesium Oxide molarity increasing. The study promised to use crystal violet dye with magnesium Oxide as solar cells materials for low cost.

  Key-Words / Index Term
  Magnesium Oxide, Dye Sensitized Solar Cell, Efficiency, Crystal Violet Dye

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  Citation
  A.A. Elbadawi, S. I. Hamza, A.S. Hamed, Y.A. Alsabah, "Synthesis and Solar Cell Application of Dye Sensitized Magnesium Oxide MgO," International Journal of Scientific Research in Physics and Applied Sciences, Vol.10, Issue.3, pp.49-54, 2022