Dr. Ankush Kumar Bedyal
Assistant Professor

ankush.bedyal@chitkara.edu.in

Expert Areas : Phosphors, Luminescence, Light Emitting Diodes, Thermoluminescence

Dr Ankush Kumar Bedyal has completed PhD in Material Science/Physics from School of Physics, Shri Mata Vaishno Devi University, Katra, Jammu & Kashmir, India. He has worked as Post Doctorate Fellow at Department of Physics, University of the Free State, Bloemfontein, South Africa.

Dr Bedyal has more than 8 years of experience in research. He has published more than 34 research papers in reputed journals and proceedings of International and National Conferences. He has presented his work at many national and international conference in India and Abroad.

He has delivered a couple of invited lectures in national conferences, India. He has worked in the field of luminescence properties of phosphors particularly, Photoluminescence, Thermoluminescence, Cathodoluminescence for their applications in lighting, White Light-Emitting Diodes, Displays, Dosimetry and on the modification of luminescence, optical and structural properties of phosphors by Swift Heavy Ion irradiation. His current research mainly focuses on the synthesis and optimization of the up and down-conversion nanophosphors for light-emitting diodes, solar cells, display panels, and dosimetry applications, material modification using swift heavy ion irradiation, nano phosphor composites for photocatalytic activity.

Dr Bedyal is an active reviewer of several SCI journals like Journal of Alloys and Compound (Elsevier), Journal of Materials and Design (Elsevier), Materials Science and Engineering B (Elsevier), Journal of Radiation Effects and defects in solids (Taylor & Francis), Materials Chemistry and Physics (Elsevier), Journal of Material Research and Technology (Elsevier), Rare Metals (Springer).

  • Research
  • Teaching
  • Awards
  • Education
  • Service

PUBLICATIONS:

  1. Bedyal, A. K., Kunti, A. K., Menon, S. G., Kumar, V., & Swart, H. C. (2020). Red emitting non-rare earth doped LiMgBO3 phosphor for light emitting diodes. Journal of Alloys and Compounds, 830, pp. 154622. Visit: https://doi.org/10.1016/j.jallcom.2020.154622
  2. Bedyal, A. K., Kunti, A. K., Kumar, V., & Swart, H. C. (2019). Effects of cationic substitution on the luminescence behavior of Dy3+ doped orthophosphate phosphor. Journal of Alloys and Compounds, 806, pp. 1127-1137. Visit: https://doi.org/10.1016/j.jallcom.2019.07.305
  3. Bedyal, A. K., Ramteke, D. D., Kumar, V., & Swart, H. C. (2019). Excitation wavelength and Eu3+/Tb3+ content ratio dependent tunable photoluminescence from NaSrBO3:Eu3+/Tb3+ Journal of Materials Science: Materials in Electronics, Vol. 30(12), pp. 11714-11726. Visit: https://doi.org/10.1007/s10854-019-01533-4
  4. Bedyal, A. K., Ramteke, D. D., Kumar, V., & Swart, H. C. (2018). Blue photons excited highly chromatic red light emitting K3La(PO4)2:Pr3+ phosphors for white light emitting diodes. Materials Research Bulletin,103, pp. 173-180. Visit: https://doi.org/10.1016/j.materresbull.2018.03.034
  5. Biswas, P., Kumar, V., Sharma, V., Bedyal, A. K., Padha, N., & Swart, H. C. (2018). Potential of Sm3+ doped LiSrVO4 nanophosphor to fill amber gap in LEDs. Physica B: Condensed Matter, 535, pp. 221-226. Visit: http://dx.doi.org/10.1016/j.physb.2017.07.040
  6. Bedyal, A. K., Kumar, V., & Swart, H. C. (2018). A potential green emitting citrate gel synthesized NaSrBO3:Tb3+ phosphor for display application. Physica B: Condensed Matter, 535, pp. 189-193. Visit: http://dx.doi.org/10.1016/j.physb.2017.07.034
  7. Bedyal, A. K., Kumar, V., & Swart, H. C. (2018). Thermoluminescence response and kinetic parameters of UV irradiated K3La(PO4)2:Pr3+Vol. 2006, pp. 020001. Visit: https://doi.org/10.1063/1.5051256
  8. Neharika, Sharma, J., Sharma, V., Bedyal, A. K., Swart, H. C., & Kumar, V. (2018). Synthesis and thermoluminescence studies of UV-C exposed Li4Ca(BO3)2: Dy3+ Vacuum, Vol. 156, pp. 370-374. Visit: https://doi.org/10.1016/j.vacuum.2018.08.003
  9. Neharika, Singh, V. K., Sharma, J., Bedyal, A. K., Kumar, V., & Swart, H. C. (2018). Surface and spectral studies of Sm3+ doped Li4Ca(BO3)2 phosphors for white light emitting diodes. Journal of Alloys and Compounds, 738, pp. 97-104. Visit: https://doi.org/10.1016/j.jallcom.2017.12.118
  10. Bedyal, A. K., Kumar, V., Ntwaeaborwa, O. M., & Swart, H. C. (2017). Investigation of thermoluminescence response and trapping parameters of 120 MeV Ag9+ and γ-ray exposed NaSrBO3:Dy3+ phosphor for dosimetry. Journal of Alloys and Compounds, 691, pp. 919-928. Visit: http://dx.doi.org/10.1016/j.jallcom.2016.09.002
  11. Balakrishna, A., Swart, H. C., Ramaraghavulu, R., Bedyal, A. K., Kroon, R. E., & Ntwaeaborwa, O. M. (2017). Structural evolution induced by substitution of designated molybdate sites (MoO4−2) with different anionic groups (BO3−3, PO4−3 and SO4−2) in CaMoO4:Sm3+ phosphors-A study on color tunable luminescent properties. Journal of Alloys and Compounds, 727, pp.224-237. Visit: https://doi.org/10.1016/j.jallcom.2017.08.117
  12. Bedyal, A. K., Kumar, V., & Swart, H. C. (2017). Charge compensated derived enhanced red emission from Sr3(VO4)2:Eu3+ nanophosphors for white light emitting diodes and flat panel displays. Journal of Alloys and Compounds, 709, pp. 362-372. Visit: http://dx.doi.org/10.1016/j.jallcom.2017.03.139
  13. Bedyal, A. K., Kumar, V., & Swart, H. C. (2017). Investigation of thermoluminescence characteristics of NaSrBO3:Sm3+ phosphor against 120 MeV Ag9+ ion and γ-ray irradiation prepared by different methods. Journal of Luminescence, 187, pp. 499-506. Visit: http://dx.doi.org/10.1016/j.jlumin.2017.03.068
  14. Kumar, V., Manhas, M., Bedyal, A. K., & Swart, H. C. (2017). Synthesis, spectral and surface investigation of novel CaMgB2O5:Dy3+ nanophosphor for UV based white LEDs. Materials Research Bulletin, 91, pp. 140-147. Visit: http://dx.doi.org/10.1016/j.materresbull.2017.03.037
  15. Manhas, M., Kumar, V., Singh, V. K., Sharma, J., Prakash, R., Bedyal, A. K., Swart, H. C. (2017). A novel orange-red emitting Ba2Ca(BO3)2:Sm3+ phosphor to fill the amber gap in LEDs: Synthesis, structural and luminescence characterizations. Current Applied Physics, 17(11), pp. 1369-1375. Visit: http://dx.doi.org/10.1016/j.cap.2017.07.015
  16. Bedyal, A. K., Kumar, V., Ntwaeaborwa, O. M., & Swart, H. C. (2016). Effect of swift heavy ion irradiation on structural, optical and luminescence properties of SrAl2O4:Eu2+, Dy3+ Radiation Physics and Chemistry, Vol. 122, pp. 48-54. Visit: http://dx.doi.org/10.1016/j.radphyschem.2016.01.017
  17. Bedyal, A. K., Kumar, V., Ntwaeaborwa, O. M., & Swart, H. C. (2016). Thermoluminescence response of 120 MeV Ag9+ and γ-ray exposed LiMgBO3:Dy3+ nanophosphors for dosimetry. Ceramics International, 42(16), pp.18529-18535. Visit: http://dx.doi.org/10.1016/j.ceramint.2016.08.191
  18. Gupta, P., Bedyal, A. K., Kumar, V., Singh, V. K., Khajuria, Y., Ntwaeaborwa, O. M., & Swart, H. C. (2016). Thermoluminescence and glow curves analysis of γ-exposed Eu3+ doped K3Y(PO4)2 Materials Research Bulletin, Vol. 73, pp. 111-118. Visit: http://dx.doi.org/10.1016/j.materresbull.2015.08.030
  19. Bedyal, A. K., Kumar, V., Prakash, R., Ntwaeaborwa, O. M., & Swart, H. C. (2015). A near-UV-converted LiMgBO3:Dy3+ nanophosphor: Surface and spectral investigations. Applied Surface Science, 329, pp. 40-46. Visit: http://dx.doi.org/10.1016/j.apsusc.2014.12.056
  20. Bedyal, A. K., Kumar, V., Singh, V. K., Singh, F., Lochab, S. P., Ntwaeaborwa, O. M., & Swart, H. C. (2015). The influence of Ag9+ ion irradiation on the structural, optical and luminescence properties of Sm3+ doped NaSrBO3: Stability of color emission. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 351, pp. 27-34. Visit: http://dx.doi.org/10.1016/j.nimb.2015.03.088
  21. Kumar, V., Bedyal, A. K., Ntwaeaborwa, O. M., & Swart, H. C. (2015). Orange-Red Emitting Pr3+ Doped NaSrBO3 Nanophosphors: Luminescence and Optical Studies. Materials Focus, 4(5), pp. 362-365. Visit: https://doi.org/10.1166/mat.2015.1265
  22. Bedyal, A. K., Kumar, V., Sharma, V., Singh, F., Lochab, S. P., Ntwaeaborwa, O. M., & Swart, H. C. (2015) Luminescence, Optical and Surface Studies of Green Emitting KCaBO3:Tb3+ International Journal of Luminescence and Applications. Vol. 1, pp 47-50. Visit: http://ijlaindia.org/2015/02/
  23. Gupta, P., Bedyal, A. K., Kumar, V., Khajuria, Y., Sharma, V., Ntwaeaborwa, O. M., & Swart, H. C. (2015). Energy transfer mechanism from Gd3+ to Sm3+ in K3Gd(PO4)2:Sm3+ Materials Research Express, Vol. 2(7), pp. 076202. Visit: https://iopscience.iop.org/article/10.1088/2053-1591/2/7/076202/meta
  24. Gupta, P., Bedyal, A. K., Kumar, V., Khajuria, Y., Kumar, V., Coetsee-Hugo, E., . . . Swart, H. C. (2014). Spectral and surface investigations on Eu3+ doped K3Y(PO4)2 nanophosphor: A promising orange–red phosphor for white light-emitting diodes. Optical Materials, 36(5), pp. 996-1001. Visit: http://dx.doi.org/10.1016/j.optmat.2014.01.008
  25. Gupta, P., Bedyal, A. K., Kumar, V., Khajuria, Y., Lochab, S. P., Pitale, S. S., . . . Swart, H. C. (2014). Photoluminescence and thermoluminescence properties of Tb3+ doped K3Gd(PO4)2 Materials Research Bulletin, Vol. 60, pp. 401-411. Visit: doi: http://dx.doi.org/10.1016/j.materresbull.2014.09.001
  26. Gupta, P., Bedyal, A. K., Kumar, V., Khajuria, Y., Ntwaeaborwa, O. M., & Swart, H. C. (2014). A Promising Orange-Red Nanocrystalline Potassium Lanthanum Orthophosphate for White Light-Emitting Diodes. Indian Journal of Materials Science, pp. 1-4. Visit: https://www.hindawi.com/journals/ijms/2014/794680/
  27. Bedyal, A. K., Kumar, V., Ntwaeaborwa, O. M., & Swart, H. C. (2014). A promising orange-red emitting nanocrystalline NaCaBO3:Sm3+ phosphor for solid state lightning. Materials Research Express, 1(1), pp.015006. Visit: https://iopscience.iop.org/article/10.1088/2053-1591/1/1/015006/meta
  28. Bedyal, A. K., Kumar, V., Sharma, V., Singh, F., Lochab, S. P., Ntwaeaborwa, O. M., & Swart, H. C. (2014). Swift heavy ion induced structural, optical and luminescence modification in NaSrBO3:Dy3+ Journal of Materials Science, Vol. 49(18), pp. 6404-6412. Visit: https://link.springer.com/article/10.1007/s10853-014-8367-0
  29. Kumar, V., Bedyal, A. K., Sharma, J., Kumar, V., Ntwaeaborwa, O. M., & Swart, H. C. (2014). Spectral and surface investigations of Ca2V2O7:Eu3+ nanophosphors prepared by citrate-gel combustion method: a potential red-emitting phosphor for near-UV light-emitting diodes. Applied Physics A, 116(4), pp. 1785-1792. Visit: https://link.springer.com/article/10.1007%2Fs00339-014-8331-5
  30. Kumar, V.,Bedyal, A. K., Sharma, V., Singh, F., Lochab, S. P., Ntwaeaborwa, O. M., & Swart, H. C. (2013) Spectral and surface investigations on SrZnO2:Tb3+ J Integ. Sc Tech, Vol. 1, pp.19-23. Visit: http://www.pubs.iscience.in/journal/index.php/jist/article/view/7
  31. Bedyal, A. K., Sharma, V., Singh, F., Lochab, S. P., Ntwaeaborwa, O. M., & Swart, H. C. (2013). Luminescence and surface properties of Tb3+ doped Sr3(VO4)2 J Integ. Sc Tech, Vol. 1, pp. 5-8. Visit: http://www.pubs.iscience.in/journal/index.php/jist/article/view/11/0
  32. Kumar, V., Bedyal, A. K., Pitale, S. S., Ntwaeaborwa, O. M., & Swart, H. C. (2013). Synthesis, spectral and surface investigation of NaSrBO3:Sm3+ phosphor for full color down conversion in LEDs. Journal of Alloys and Compounds, 554, pp. 214-220. Visit: http://dx.doi.org/10.1016/j.jallcom.2012.11.125
  33. Bedyal, A. K., Kumar, V., Singh, V. K., Lochab, S. P., Singh, F., Ntwaeaborwa, O. M., & Swart, H. C. (2013). Thermo-luminescence kinetic parameters of γ-irradiated Sr4Al14O25:Eu2+, Dy3+ Radiation Effects and Defects in Solids, Vol. 168(11-12), pp. 1022-1029. Visit: http://dx.doi.org/10.1080/10420150.2013.784910
  34. Bedyal, A. K., Kumar, V., Sharma, V., Pitale, S. S., Coetsee, E., Duvenhage, M. M., Swart, H. C. (2013). Spectral and surface investigations of Mn2+ doped SrZnO2 nanocrystalline phosphors. Journal of Materials Science, 48(9), pp. 3327-3333. Visit: https://link.springer.com/article/10.1007/s10853-012-7121-8
  35. Bedyal, A. K., Kumar, V., Lochab, S. P., Singh, F., Ntwaeaborwa, O. M., & Swart, H. C. (2013). Thermoluminescence response of gamma irradiated SrAl2O4:Eu2+/Dy3+ nanophosphor. International Journal of Modern Physics: Conference Series, Vol. 22, pp. 365-373. Visit: http://dx.doi.org/10.1142/S2010194513010386

FIELD OF SPECIALISATION:
Materials science, Solid state physics, Nanomaterials and Nanotechnology, Atomic and molecular Spectroscopy, Mathematical physics and Theory of liquid crystal, are mainly interesting subject for the teaching at both UG and PG level.

AWARDS:

  1. JRF (Junior Research Fellow), Funding Agency (Inter-University Accelerator Centre, New Delhi, INDIA), , 2011 – Dec., 2013.
  2. SRF (Senior Research Fellow), Funding Agency (Inter-University Accelerator Centre, New Delhi, INDIA), , 2013 – Dec., 2014.
  3. Post Doctoral Award, University of Free State, South Africa, 2016.
  • Post-Doctoral (Nanophosphors) from University of The Free state, Bloemfontein, South Africa.
  • PhD (Material Science/Physics);“Effect of Swift heavy ion irradiation on Oxide materials: Luminescence and related studies.”
  • M.Philin Physics from Lovely Professional University, Punjab, India.
  • M.Sc. in Physics from Lovely Professional University, Punjab, India.
  1. 3 year 4 months, Post Doctoral Fellow (PDF), University of The Free Sate, South Africa(May 2016 – September 2019).
  2. 2 years, Senior Research Fellow (S.R.F), IUAC, India sponsored projectDecember (2013 – December 2014).
  3. 1 year, Junior Research Fellow (J.R.F), IUAC, India sponsored project (December 2011 – December 2013).