Dr. Raphael L Nyenge

Dr. R. L. Nyenge

Title/Qualifications: Dr. (PhD)
Department/Unit/Section:
Physics
Contact Address:
P.O Box 43844-00100
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Phone: +254733798282
Position:
Lecturer
Current Research:
Solar Cell Materials
University:
Kenyatta University.

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Area of Specialization: Electronics
Research Interests:
Semiconductor Physics and Applications

Publications

  • R. L. Nyenge, H. C. Swart, O. M. Ntwaeaborwa, Auger electron spectroscopy study and  depth profile analyses of the CaS:Eu2+ pulsed laser deposited thin luminescent films Appl. Phys. A (2016) 122:621 DOI 10.1007/s00339-016-0135-3.
  • Simon N. Ogugua, Raphael L. Nyenge, Phillip T. Sechogela, Hendrik C. Swart, Odireleng M.  Ntwaeaborwa, Influence of deposition atmosphere and substrate temperature on the structure, morphology, and photoluminescence of pulsed laser deposited La0.5Gd1.5SiO5:Dy3+, 34 021520 (2016); doi: 10.1116/1.4942502.
  • L.L. Noto, D. Poelman, V.R. Orante-Barrón, H.C. Swart, L.E. Mathevula, R. Nyenge, M. Chithambof, B.M. Mothudia, M.S. Dhlaminia, Photoluminescence and  thermoluminescence properties of BaGa2O4, Physica B 535 (2018) 268–271.
  • Musila N., Munji M., Simiyu J., Masika E. and Nyenge R., (2018). Optical Properties and Analysis of OJL Model’s Electronic inter-band Transition Parameters of TiO2 Films,  Traektoriâ Nauki = Path of Science, 4(7):3001-3012 https://pathofscience.org/index.php/ps/article/view/528
  • Musila N., Munji M., Simiyu J., Masika E. and Nyenge R., (2018). Effect of TiO2 Compact Layer on DSSC Performance, Traektoriâ Nauki = Path of Science, 4(9):5001-5008 https://pathofscience.org/index.php/ps/article/view/547
  • Musila N., Munji M., Simiyu J., Masika E., Nyenge R. and Kineene M., (2018). Characteristics of TiO2 Compact Layer prepared for DSSC application, Traektoriâ Nauki = Path of Science, 4(10):3006-3012 https://pathofscience.org/index.php/ps/article/view/557
  • R.L. Nyenge, H.C. Swart, O.M. Ntwaeaborwa, Influence of Substrate Temperature and Deposition pressure on Pulsed laser deposited thin films of CaS:Eu2+ phosphors, Physica B 480 (2016)186-190.
  • R.L. Nyenge, H.C. Swart, D. Poelman, P. F. Smet , L.I.D.J. Martin, L.L. Noto, S. Som,  O.M. Ntwaeaborwa, Thermal quenching, cathodoluminescence and thermoluminescence study of Eu2+ doped CaS powder, J. Alloys Compd. 657 (2016) 787-793.
  • R.L. Nyenge, H.C. Swart, O.M. Ntwaeaborwa, Luminescent properties, intensity degradation and X-ray photoelectron spectroscopy analysis of CaS:Eu2+ powder, Opt. Mater. 40 (2015) 68–75.
  • R.L. Nyenge, P.T. Sechogela, H.C. Swart, O.M. Ntwaeaborwa, The influence of laser wavelength on the structure, morphology and photoluminescence properties of pulsed laser deposited CaS:Eu2+ thin films, J. Mod. Opt. 62 (2015) 1102-1109,DOI 10.1080/09500340.2015.1020898.
  • R. L. Nyenge, S.K.K. Shaat, L.L. Noto, P.P. Mokoena, H. C. Swart, O. M. Ntwaeaborwa,  TOF SIMS Analysis, Structure and Photoluminescence Properties of Pulsed Laser Deposited CaS:Eu2+ thin films, J. Lumin. 167 (2015) 172-178.

Presentations in Conferences/Workshops

  1. R. L. Nyenge, in attendance, the 58th annual conference of South African Institute of Physics (SAIP), 8-12th July, 2013, Richards Bay Campus, University of Zululand.
  2. R. L. Nyenge, P.T. Sechogela, H. C. Swart, O. M. Ntwaeaborwa, “The influence of laser wavelength on the structure, morphology and photoluminescence properties of pulsed laser deposited CaS:Eu2+ thin films”, ALC femto second Laser Workshop, 18-20 NOV 2014, University of Stellenbosch, South Africa.
  3. R. L. Nyenge, S.K.K. Shaat, L. L. Noto, P. P. Mokoena,, H.C. Swart, O.M. Ntwaeaborwa, “TOF SIMS Analysis, structure and photoluminescence properties of pulsed laser deposited CaS:Eu2+ thin films”, 6th South African Conference on Photonic Materials, 5 - 7 May 2015, Mabula Game Lodge, Limpompo, South Africa.
  4. R.L. Nyenge, H. C. Swart, O. M. Ntwaeborwa, “The influence of the number of pulses and post annealing on the morphology and photoluminescence properties of CaS:Eu2+ pulsed laser deposition thin films”, 60th Annual Conference of the South African Institute of  Physics, 29 June – 3 July 2015, Port Elizabeth, South Africa.
  5. R.L. Nyenge, H.C. Swart, O.M. Ntwaeaborwa, “Cathodoluminescent and Photoluminescent  Properties of Pulsed Laser Deposited Thin Film Phosphors”, International Conference on Laser Ablation 31 August - 4 September 2015, Cairns, Queensland, Australia.

 

Last Updated on Thursday, 30 May 2019 07:58

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