Dr. Mahesh S K

drskmahesh@gmail.com, 9400892171

Me in words

Best poster award in the International Conference on Advanced Functional Materials (ICAFM-2014), held by National Institute for Interdisciplinary Science & Technology (NIIST-CSIR), Thiruvananthapuram, India.

 

Departments

Dr. Mahesh S K

Assistant Professor

Name  Dr. Mahesh S K
Designation Assistant Professor
Department P.G. and Research Department of Physics
Address Elluvila Veedu, Ummannoor P.O., Kottarakkara, Kollam – 691 520
Mobile number 9400892171
E-mail address drskmahesh@gmail.com
Academic qualifications MSc, CSIR-JRF, Ph.D
Area of Interest/ Specialisation
  • Materials Science
Area of Research
  • Design and development of novel pyrochlore oxide based red phosphors for phosphor converted White Light Emitting Diode (pc-WLED) applications.
  • Tuning of spectral properties of Eu3+ activated pyrochlore red phosphors by the introduction of local distortion and modification in polarizabilty of chemical environment of Eu3+.
  •  Influence of cation substitution and activator site control on the photoluminescence properties of phosphors using powder X-ray diffraction, Rietveld analysis, Raman spectrum analysis, and photoluminescence excitation and emission spectra.
  • Role of synthesis methods and processing conditions in determining the photoluminescence properties of the above functional oxides.
Responsibilities Undertaken
  • College Council Secretary
  • NAAC Co-ordinator
  • College Level Monitoring Committee (CLMC) Convener,
  • Additional Chief Superintendent of University Examination,
  • Convener, Institution's Innovation Council
  • Member in charge of Renovation, Project Monitoring Unit, RUSA
  • Scholar Support Program (SSP) Coordinator,
  • Convenor-DLMC, Science Club, Debate Club
Publications – Books / Chapters /  Journals
  • Reply to comment on “Dependence on charge transfer band and emission properties by the crystal chemistry of A- and B-site cations in Eu3+-doped quaternary pyrochlore-type red phosphors, Ca(RE)1−x(M)NbO7 (RE=Y, Gd; M=Ti, Sn)”; S. K. Mahesh & P. Prabhakar Rao; J Mater Sci: Mater Electron 32 (2021) 23724-27.
  • Dependence on Charge Transfer Band and Emission Properties by the Crystal Chemistry of A-and B-Site Cations in Eu3+-doped quaternary pyrochlore-type red phosphors Ca(RE)1−x(M)NbO7 (RE = Y, Gd; M = Ti, Sn); S. K. Mahesh & P. Prabhakar Rao; J Mater Sci: Mater Electron 31(2020) 20847-57.
  • Studies on the photoluminescent properties of a single phase white light emitting phosphor CaLa1−xNbMoO8:x Dy3+ for pc-white LED applications; Parvathi S.Babu, P. PrabhakarRao, S.K.Mahesh, T. Linda Francis and T.S.Sreena; Mater. Lett. 170(2016) 196-98.
  • Effect of host structure on the photoluminescence properties of Ln3TaO7: Eu3+ red phosphors; Linda T. Francis,  P. Prabhakar Rao, S. K. Mahesh, T. S. Sreena and Parvathi S. Babu; Opt. Mater. 52(2016) 134-43.
  • Novel Red Phosphors Gd2GaTaO7:Eu3+, Bi3+ for White LED applications, Linda T. Francis,  P. Prabhakar Rao, S. K. Mahesh, T. S. Sreena and Parvathi S. Babu J Mater Sci: Mater Electron 26(2015) 5743-47.
  • Intense Red Line Emitting Phosphor LuNbO4:Eu3+ for White Light Emitting Diode Applications, S. K. Mahesh , P. Prabhakar Rao, Mariyam Thomas , T. Linda Francis , V. R. Reshmi and Peter Koshy; Mater. Lett.  120(2014) 115-117.
  • Effect of Zr4+ and Si4+ substitution on the luminescence properties of CaMoO4:Eu3+ red phosphors, T. Linda Francis,  P. Prabhakar Rao, Mariyam Thomas, S. K. Mahesh and V. R. Reshmi   J Mater Sci: Mater Electron 25(2014) 2387-93.
  • Structural influence on the photoluminescence properties of Eu3+ doped Gd3MO7 (M = Nb, Sb, Ta) Red Phosphors, Linda Francis, P. Prabhakar Rao, Mariyam Thomas, Mahesh S K, Reshmi V. R and Sreena T. S  Phys. Chem. Chem. Phys., 16(2014) 17108-15.
  • Influence of Cation Substitution and Activator Site Exchange on the Photoluminescence Properties of Eu3+-Doped Quaternary Pyrochlore Oxides, S. K. Mahesh , P. Prabhakar Rao, Mariyam Thomas , T. Linda Francis , and Peter Koshy; Inorg. Chem. 52 (2013) 3304−3313.
  • Photoluminescence characteristics of new stannate pyrochlore based red phosphors: CaLaSnNbO7:Eu3+, S.K. Mahesh, P. Prabhakar Rao, Mariyam Thomas, A.N. Radhakrishnan and Peter Koshy; J Mater Sci: Mater Electron 23 (2013) 1605-09.
  • Enhanced Eu3+ Red Luminescence in Scheelite Based Oxides CaLaSbWO8, V. R. Reshmi, P. Prabhakar Rao, Mariyam Thomas, S. K. Mahesh and T. Linda Francis, J. Solid State Sci. Technol. 2(2013) R44-48.
  • New Orange-Red Emitting Phosphor La3NbO7:Eu3+ under Blue excitation; Linda Francis T, Prabhakar Rao P, Mariyam Thomas, Mahesh S. K. and Reshmi V R; Mater. Lett. 81(2012) 142-44.
  • Electrical transport properties of manganese containing pyrochlore type semiconducting oxides using impedance analyses, S. Sumi , P. Prabhakar Rao , S.K. Mahesh and Peter Koshy, Mater. Res. Bull. 47(2012) 4365-75.
  • Improvement of Morphology and Luminescence properties of Powellite type Red phosphors CaGd1-xNbMoO8:xEu3+ Synthesized via Citrate gel route, Mariyam Thomas, P. Prabhakar Rao, S.K. Mahesh, V. R. Reshmi,T. Linda Francis and Peter Koshy, J. Am. Ceram. Soc. 95(2012) 2260-65.
  • Role of Bond Strength on the Lattice Thermal Expansion and Oxide Ion Conductivity in Quaternary Pyrochlore Solid Solutions; Radhakrishnan A.N., Rao P.P., Mahesh S.K., Vaisakhan Thampi D.S. and Koshy P. ; Inorg. Chem. 51(2012), 2409-19.
  • Luminescent properties of Eu3+, Bi3+ co activated CaLaNbWO8 red phosphors under near UV and Blue excitations, Mariyam Thomas, P. Prabhakar Rao, S.K. Mahesh, Sandhya Kumari and Peter Koshy. Phys. Status Solidi A, 208 (2011) 2170–2175.
Papers presented in seminars
  • Eu3+ Doped Intense Red Emitting Fergusonite Phosphors for pc-WLED Applications,     S. K. Mahesh, P. Prabhakar Rao, T. Linda Francis, T.S. Sreena, Athira K. V. Raj, Parvathi S. Babu and Peter Koshy, 5th International Conference on Luminescence and its Applications (ICLA -2015), Bangalore, India.
  • Enhanced Red Luminescence in Eu3+ Ion Activated Quaternary Pyrochlore Oxides Through Compositional Modification, S. K. Mahesh, P. Prabhakar Rao, T. Linda Francis, T.S. Sreena, Athira K. V. Raj, Parvathi S. Babu and Peter Koshy, 5th International Conference on Luminescence and its Applications (ICLA -2015), Bangalore, India.
  • Luminescence Enhancement Through Compositional Modifications in Quaternary Pyrochlore Type Red Phosphors for pc-WLED Applications; S. K. Mahesh, P. Prabhakar Rao, T. Linda Francis, V.R. Reshmi, T.S. Sreena, Peter Koshy; International Conference on Advanced Functional Materials (ICAFM-2014), National Institute for Interdisciplinary Science & Technology (NIIST-CSIR), Thiruvananthapuram, India.
  • Effect of Si substitution on the luminescent properties of Ce0.85O2:0.15Eu3+ phosphors prepared by citrate method; Athira K.V Raj, P. Prabhakar Rao, S. K. Mahesh, T. Linda Francis, V.R. Reshmi, T.S. Sreena; International Conference on Advanced Functional Materials (ICAFM-2014), National Institute for Interdisciplinary Science & Technology (NIIST-CSIR), Thiruvananthapuram, India.
  • Synthesis and characterization of stannate based pyrochlore red emitting phosphors for White Light Emitting; T.S. Sreena, P. Prabhakar Rao, S. K. Mahesh,  T. Linda Francis, Athira K.V Raj, V.R. Reshmi; International Conference on Advanced Functional Materials (ICAFM-2014), National Institute for Interdisciplinary Science & Technology (NIIST-CSIR), Thiruvananthapuram, India.
  • New Molybdenum based Pyrochlore type red phosphors KGd1-xSnMoO7: Eu3+; Reshmi V R, Prabhakar Rao P, Mariyam Thomas, Mahesh S K, Linda Francis T; 4th International Conference on Luminescence and its Applications ( ICLA -2012), Hyderabad, India.
  • Intense Orange Red emitting phosphor La3NbO7: Eu3+ under Blue excitation, Linda Francis T, Prabhakar Rao P, Mariyam Thomas, Mahesh S K, Reshmi V R; 4th International Conference on Luminescence and its Applications ( ICLA -2012), Hyderabad, India.
  • Luminescence Properties of KNbMoO6:Eu3+ Phosphors; S. K. Mahesh, P. Prabhakar Rao, T. Linda Francis, V. R. Reshmi, Peter Koshy;  National Conference on Luminescence and its Applications (NCLA -2013) , Bangalore, India.
  • Photoluminescence Studies of Nanophosphor,NaYP2O7:Eu3+ Synthesized via Citrate and Hydrothermal Methods; A.N Ajmal, P Prabhakar Rao, S.K Mahesh; Nano India (2013), Trivandrum, India.
  • Photoluminescence properties of new Gd2GaTaO7:Eu3+, Bi3+red phosphors; Linda Francis T, P. Prabhakar Rao, Mariyam Thomas, S.K. Mahesh, Reshmi V; National Conference on Luminescence and its Applications (NCLA -2013) , Bangalore, India.
  • Enhanced Photoluminescence of CaMoO4:Eu3+ red phosphors by ZrSiO4 addition; Linda Francis T, P. Prabhakar Rao, Anila Raj, Mariyam Thomas, S.K. Mahesh, Reshmi V R.; 25TH Kerala Science Congress (2013), Trivandrum, Kerala.
  • Photoluminescence Properties in New Pyrochlore Type Oxides Gd3-xYxMO7:yEu3+ [M=Nb, Ta, Sb]; Linda Francis T, Prabhakar Rao P, Mariyam Thomas, Mahesh S K, Reshmi V R; Science Technology and Applications of  Rare Earths : Conference organized by Rare Earth Association of  India (REAI STAR -2011), Munnar, Kerala.
  • New Powellite based Red phosphors CaLa1-xSbMo/WO8: xEu3+ for WLED applications; Reshmi V R, Prabhakar Rao P, Mariyam Thomas, Mahesh S K, Linda Francis T ; Science Technology and Applications of  Rare Earths : Conference organized by Rare Earth Association of  India (REAI STAR -2011), Munnar, Kerala.
  • Oxide ion Conductivity and lattice Thermal expansion Studies in CaGdZrNb1-xTaxO7Pyrochlore Solid Solutions; A. N. Radhakrishnan, P. Prabhakar Rao, S. K. Mahesh, D. S. Vaisakhan Thampi and Peter Koshy; 7th National Symposium and Conference on Solid State Chemistry and Allied Areas (ISCAS-2011), Jamia Millia Islamia, New Delhi.
  • Synthesis and luminescent properties of novel red phosphors CaGd1-xNbMoO8: xEu3+ for  White Light Emitting Diodes; Mariyam Thomas, Prabhakar Rao, S.K. Mahesh, V.R. Reshmi, Linda Francis T, Peter Koshy; 23rd Kerala Science Congress (2011).
  • Luminescent Properties of Bi3+ Coactivated Novel Red Phosphors CaGd0.75−yNbWO8 :0.25Eu3+,yBi3+ for White Light Emitting Diodes; Mariyam Thomas, Prabhakar Rao P, Mahesh S K, Reshmi V R, Linda Francis T, Peter Koshy; Science Technology and Applications of  Rare Earths : Conference organized by Rare Earth Association of  India (REAI STAR -2011), Munnar, Kerala.
  • Red luminescence in Stannate Based Pyrochlore Type Phosphors: CaYSnNbO7:Eu3+ ; S.K. Mahesh, P. Prabhakar Rao, Mariyam Thomas, Linda Francis T, Reshmi V R Peter Koshy; 7th National Symposium and Conference on Solid State Chemistry and Allied Areas (ISCAS-2011), Jamia Millia Islamia, New Delhi.
Courses &Workshops attended
  • Faculty Development Program: Workshop on Time Table Creation Software - FET organized by IQAC and IT Club of NSS Training College, Ottapalam, on 12th June 2024.
  • Faculty Development Programme (FDP) on "Introduction to Indian Knowledge Systems (IKS) incorporating Traditional Knowledge (TK) and Intellectual Property Rights (IPR)." Organized by IGNCA, Ministry of Culture in collaboration with NSS College Pandalam and Chinmaya Viswa Vidhyapeeth, Kerala from 11th to 15 th March 2024.
  • UGC Sponsored Short-Term Course in “Student Counselling, Mentoring and Soft Skill Development” conducted by UGC-HRDC, University of Kerala, kariavattom, Thiruvananthapuram from 08.02.24 to 14.02.24.
  • Two day National workshop on “Diversity, Inclusion and Equity : Reforms in Pedagogy as envisionec in NEP 2020”  organized by UGC-HRDC , University of Kerala in collaboration with IQAC, NSS College Pandalam on 20 and 21 January 2023.
  • UGC Sponsored Short-Term Course in “Disaster Management and Climate Change-1” conducted by UGC-HRDC, Kannur University,Kannur from 26.07.22 to 01.08.22.
  • UGC Sponsored Online Winter School in Physics and Chemistry conducted by UGC-HRDC, Kannur University, Kannur from 24.11.2021 to 07.12.2021.
  • Very. Rev. T. M. Samuel Ramban Lecture Series on “Monitoring Climate Change through Satellite Measurements” organized by the Post Graduate Department of Physics, St. Stephen’s College, Pathanapuram on 6th February 2021.
  • Raman Optronics Webinar Series 2020: Virtual International Conference held on 28th October 2020 organized by theDepartment of Optoelectronics.
  • Webinar on “Climate Change and Disaster Risk Reduction” on 11th August 2020 organized by PG & Research Department of Physics in association with IQAC, N.S.S. College, Pandalam.
  • international webinar on “Quantum Cryptography”, held in an all virtual format, organized by Department of Physics, Government College Kariavattom, Thiruvanathapuram on Ist August 2020.
  • Moodle Learning Management System training organized at Sree Narayana College,Kannur in January 2020 in collaboration with the Spoken Tutorial Project, IIT Bombay, funded by the National Mission on Education through ICT, MHRD, Govt. of India.
  • UGC Sponsored Refresher course in Material Science conducted bu UGC-HRDC, University of Hyderabad from 17.01.2019 to 06.02.20219.
  • National Workshop on Electronics Experiments organized by Academy of Physics Teachers (APT), Kerala and hosted by Department of Physics, Union Christian College, Aluva on 19-20 May 2018.
  • UGC sponsored Orientation Programme organised by human Resource Development Centre (HDRC), Jawaharlal Nehru Technological University, Hyderabad from 12.02.2018 to 13.03.2018.
  • National Seminar on Advancements in Physics (NSAP- 2017) organized by Department of Physics, Govt. College for Women, Thiruvananthapuram during 20-22 November 2017.
  • National workshop on How to Make Your Own Demonstrations for Teaching Physics organized by Academy of Physics Teachers (APT), Kerala and hosted by Department of Physics, Union Christian College, Aluva on 11-12 November 2017.
  • National workshop on Wave Mechanics organized by Academy of Physics Teachers (APT), Kerala and hosted by Department of Physics, Assumption College, Changanassery on 10-11 June 2017.
  • National workshop on Genesis of Quantum Theory organized by Academy of Physics Teachers (APT), Kerala and hosted by Department of Physics, Mar Ivanios College, Thiruvananthapuram on 29-30 April 2017.
  • Introductory Training Workshop on Nanofabrication Technologies conducted on behalf of Fostering Linkages in Academic Innovation and Research (FLAIR) program at the Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore during 17-20 January 2017.
  • Capacity Building Residential Workshop for Co-ordinators of Scholar Support programme organised by New Initiatives in Higher Education, Directorate of Collegiate Education, Govt. of Kerala held at Loyola Extension Services, Loyola Colloge of Social Sciences, Dreekaryam, Trivandrum on 26th and 27th of October 2016.
  • Fostering Linkages in Academic Innovation and Research (FLAIR) Induction Training Programme organised by New Initiatives in Higher Education, Directorate of Collegiate Education, Govt. of Kerala held at Maria Rani Training Center, Sreekariyam, Trivandrum during 26-29 September 2016.
  • National Seminar on Experimental Techniques in Astronomy & Space Sciences (NSETAS-2015) organized by Post Graduate Department of physics, NSS Hindu College, Changanacherry, Kerala during 14-16 December 2015.
  • Symposium on Higher Education organised by the Kerala Higher Education Commission (2014-15), AKPCTA  held at St. Cyrils College, Adoor, Kerala on 17th October 2015.
  • National workshop on Lagrangian Dynamics organized by Academy of Physics Teachers (APT), Kerala and hosted by Department of Physics, Vimala College, Thrissur on  27 and and 28 June 2015.
  • National workshop on Group theory organized by Academy of Physics Teachers (APT), Kerala and hosted by Department of Physics, Providence Women’s college, Kozhikode during 15-17 May 2015.
  • National workshop on Tensor Analysis organized by Academy of Physics Teachers (APT), Kerala and hosted by Department of Physics, Union Christian College, Aluva, on 14th & 15th February 2015.
  • International Conference on Luminescence and its Application (ICLA 2015)organised by PES University, Bengaluru, India in collaboration with Luminescence Society of India held at PES Institute of Technology, Bengaluru during 9-12 February, 2015.

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