Dr. Rajesh Dagupati

Scientific background: 

  • Rare earth and Transition metal ions doped Borate, Phosphate and Tellurite Glasses and Glass-

ceramics

  • Inorganic Phosphors embedded with Rare earth and Transition metal ions

International projects:

  • HORIZON 2020, WIDESPREAD, Grant number 739566 , Centre for functional and surface-functionalized glasses,  Postdoctoral Researcher, Alexander Dubček University of Trenčín, Slovakia.

 National projets:

  • FAPESP 2015/10713-0, Up & Down-conversion investigations in Rare earth ions doped Tellurite glasses and glass ceramics for Solar cell applications, Postdoctoral fellow, Physics institute of Sao Carlos, Sao Paulo, Brazil.
  • CSIR Sanction Lt. No: 09/152(0290)/2013-EMR-I, Spectroscopic investigation – NIR to Visible Up-conversion of Rare Earths Ions Incorporated Glass and Glass-Ceramics and Phosphor materials for applications of solid state lasers and white LEDs, Senior Research Fellow, Sri Venkateswara University, Tirupati, India.

Publication activity: 

  • Scientific monographs: 1
  • Publications in scientific journals (scopus): 35
  • Contributed lectures at conferences: 12
  • Citations (SCI): 470 +
  • Other types of publications: 5

The most significant publications:

 Scopus

   2019

  • Rajesh, and A.S.S. de Camargo, Nd3+ doped new oxyfluoro tellurite glasses and glass ceramics containing NaYF4 nano crystals − 1.06 µm emission analysis, J. Lumin., 207 (2019) 469-476, DOI: 10.1016/j.jlumin.2018.11.058.

2018

  • Rajesh, Pr3+ doped new TZYN glasses and glass-ceramics containing NaYF4 nanocrystals:

Luminescence analysis for visible and NIR applications, J. Optmat., 86 (2018) 178-184,

DOI: 10.1016/j.optmat.2018.10.004

  2017

  • Rajesh, M. Reza Dousti, Raja J. Amjad , A.S.S. de Camargo, Enhancement of down- and upconversion intensities in Er3+/Yb3+ co-doped oxyfluoro tellurite glasses induced by Ag species and nanoparticles, J. Lumin., 192 (2017) 250-255, DOI: 10.1016/j.jlumin.2017.06.059.
  • Rajesh, Raja J. Amjad, M. Reza Dousti, A.S.S. de Camargo, Enhanced VIS and NIR emissions of Pr3+ ions in TZYN glasses containing silver ions and nanoparticles” J. Alloys and Compounds, 695 (2017) 607-612, DOI: 10.1016/j.jallcom.2016.11.058.

  2016

  • Rajesh, M. Reza Dousti, Raja J. Amjad, A.S.S. de Camargo, Quantum cutting and up-conversion investigations in Pr3+/Yb3+ co-doped oxyfluoro- tellurite glasses, J. Non-Cryst. Solids, 450 (2016) 149–155, DOI: 10.1016/j.jnoncrysol.2016.08.009.

  2015

  • Rajesh, K. Brahmachary, Y.C. Ratnakaram, N. Kiran, A.P. Baker, W. Guigen, Energy transfer  based emission analysis of Dy3+/Eu3+ co-doped ZANP glasses for white LED applications, J. Alloy. Comp., 646 (2015) 1096-1103, DOI: 10.1016/j.jallcom.2015.05.138.
  • Seshadri, M. Radha, D. Rajesh, L.C. Barbosa, C.M.B. Cordeiro, Y.C. Ratnakaram, Effect of ZnO on spectroscopic properties of Sm3+ doped zinc phosphate glasses, Physica B, 459 (2015) 79-87, DOI: 10.1016/j.physb.2014.11.016.
  • Babu, V. Reddy Prasad, D. Rajesh and Y.C. Ratnakaram, Luminescence properties of Dy3+ doped different fluoro-phosphate glasses for solid state lighting applications, J. Mol. Struct., 1080 (2015) 153-161, DOI: 10.1016/j.molstruc.2014.09.080.
  • Brahmachary, D. Rajesh and Y.C. Ratnakaram, Luminescence properties of Dy3+-doped zinc- aluminium-sodium-phosphate (ZANP) glasses for yellowish white light applications, Optik, 126 (2015) 4050–4055, DOI: 10.1016/j.ijleo.2015.08.001.
  • Reddy Prasad, S. Babu, D. Rajesh, Y.C. Ratnakaram, Optical investigations of Sm3+ doped lead free zinc phosphate glasses, Physics and Chemistry of Glasses: European Journal of Glass Science and Technology, 56 (2015) 159-168, DOI: 10.13036/17533562.56.4.159.
  • Brahmachary, D. Rajesh and Y.C. Ratnakaram, Radiative properties and Luminescence spectra of Sm3+ ion in zinc-alumino-sodium-phosphate (ZANP) glasses, J. Lumin., 161 (2015) 202–208, DOI: 10.1016/j.jlumin.2015.01.016.

  2014

  • Rajesh, M. Dhamodhara Naidu and Y.C. Ratnakaram, PbMoO4:Eu3+ red phosphor material for potential applications in white LEDs, Indian Journal of Physics, 88 (12) (2014) 1291-1297, DOI:10.1007/s12648-014-0578-3.
  • Dhamodhara Naidu, D. Rajesh and Y.C. Ratnakaram, Kinetics of Fluorescence Properties of Eu3+ ion in strontium-aluminium-bismuth-borate glasses”, J. Rare Earths, 32 (2014) 1141-1148, DOI: 10.1016/S1002-0721(14)60195-2.
  • Balakrishna, Rajesh and Y.C. Ratnakaram, Synthesis and Photoluminescence properties of NaPbB5O9:Dy3+ phosphor material for white light applications, Physics and Chemistry of Solids, 75 (2014) 1210-1216, DOI: 10.1016/j.physb.2014.05.052.
  • Brahmachary, D. Rajesh, S. Babu and Y.C. Ratnakaram, Investigations on spectroscopic properties of Pr3+ and Nd3+ doped zinc-alumino-sodium-phosphate (ZANP) glasses” J. Mol. Struct., 1064 (2014) 6-14, DOI: 10.1016/j.molstruc.2014.01.056.
  • Babu, A. Balakrishna, D. Rajesh and Y.C. Ratnakaram, Investigations on luminescence performance of Sm3+ ions activated in multi-component fluoro-phosphate glasses, Spectrochimica acta part A, 122 (2014) 369-348, DOI: 10.1016/j.saa.2013.11.102.
  • Babu, A. Balakrishna, D. Rajesh, and Y.C. Ratnakaram, Dy3+ doped oxy-fluoride phosphate glasses for laser materials: A photoluminescence study, International Journal of ChemTech Research, 6 (3) (2014) 3726-3729, ISSN: 09744290.
  • Rajesh, M. Dhamodhara Naidu and Y.C. Ratnakaram, Synthesis and Photoluminescence properties of NaPbB5O9:Dy3+ phosphor material for white light applications, Physics and Chemistry of Solids, 75 (2014) 1210-1216, DOI: 10.1016/j.jpcs.2014.05.006.
  • Balakrishna, D. Rajesh and Y. C. Ratnakaram, Photoluminescence properties of Ho3+ ion in lithium-fluoroborate glass containing different modifier oxides, AIP Conference Proceedings, 1591 (2014) 714-716, DOI: 10.1063/1.4872729.
  • Rajesh and Y. C. Ratnakaram, Photoluminescence properties of NaPbB5O9:Dy3+ new material for white light applications” AIP Conference Proceedings, 1591 (2014) 1672-1673, DOI: 10.1063/1.4873072.
  • Brahmachary, D. Rajesh, A. Balakrishna and Y.C. Ratnakaram, Radiative properties and energy transfer mechanism of Sm3+ ion in zinc-alumino-sodium-phosphate (ZANP) glasses, International Journal of ChemTech Research, 6 (3) (2014) 1705-1707, ISSN: 09744290.

      2013  

  • C. Ratnakaram, A. Balakrishna and D. Rajesh, Influence of modifier oxides on optical properties of Er3+ doped lithium fluoroborate Glass, J. Phy. Chem. Glass., 54(5) (2013) 216- 222, ISSN: 00319090.
  • Balakrishna, D. Rajesh and Y.C. Ratnakaram, Structural and optical properties of Nd3+ in lithium fluoro-borate glass with relevant modifier oxides”, Opt. Mater., 35 (2013) 2670-2676, DOI: 10.1016/j.optmat.2013.08.004.
  • Rajesh, Y.C. Ratnakaram and A. Balakrishna, Er3+-doped strontium lithium bismuth borate glasses for broadband 1.5 μm emission-structural and optical properties, J. Alloy. Comp., 563 (2013) 22-27, DOI: 10.1016/j.jallcom.2013.02.055.
  • V. Sasi kumar, D. Rajesh, A. Balakrishna and Y.C. Ratnakaram, Optical absorption and photoluminescence properties of Dy3+ doped heavy metal borate glasses–effect of modifier oxides, J. Mole. Struc., 1041 (2013) 100-105.
  • V. Sasi kumar, D. Rajesh, A. Balakrishna and Y.C. Ratnakaram, Thermal and Optical  properties of Nd3+ doped lead zinc borate glasses–influence of alkali metal ions, Physica B, 415 (2013) 67-71, DOI: 10.1016/j.physb.2013.02.004.
  • Rajesh, A. Balakrishna and Y.C. Ratnakaram, Er3+-doped strontium-lithium-bismuth-borate glasses for broad band 1.5 μm emission-optical properties, AIP Conference Proceedings, 1512 (2013) 550, DOI: 10.1063/1.4791155.

2012

  • Rajesh, Y.C. Ratnakaram and A. Balakrishna, Luminescence properties of Sm3+ impurities in  strontium lithium bismuth borate glasses, AIP Conference Proceedings, 1447 (2012) 581, DOI:10.1063/1.4710137.
  • Rajesh, M. Seshadri, A. Balakrishna and Y.C. Ratnakaram, Luminescence structural and             dielectric properties of Sm3+ impurities in strontium lithium bismuth borate glasses, Opt. Mater., 35 (2012) 108-116, DOI: 10.1016/j.optmat.2012.07.011.
  • C. Ratnakaram, A. Balakrishna, D. Rajesh and M. Seshadri, Influence of modifier oxides on  spectroscopic properties of Sm3+ doped lithium fluoborate glasses, J. Molec. Stru., 1028 (2012) 141-147, DOI: 10.1016/j.molstruc.2012.05.071.
  • Rajesh, A. Balakrishna and Y.C. Ratnakaram, Spectroscopic investigations on Pr3+ and Nd3+ doped strontium lithium bismuth borate glasses, Spectrochimica acta part A, 97 (2012) 963- 974, DOI: 10.1016/j.saa.2012.07.100.
  • Rajesh, Y.C. Ratnakaram, M. Seshadri, A. Balakrishna and T. Satya Krishna, Structural and luminescence properties of Dy3+ ion in strontium lithium bismuth borate glasses, J. Lumin., 132 (2012) 841-849, DOI: 10.1016/j.jlumin.2011.08.050.
  • Balakrishna, D. Rajesh and Y.C. Ratnakaram, Structural and Photoluminescence properties  of Dy3+ doped different modifier oxide based lithium borate glasses, J. Lumin., 132 (2012)  2984-2991, DOI: 10.1016/j.jlumin.2012.06.014.

Education:

  • 2005: Master of Science in Physics, Sri Venkateswara University Post Graduation Center, Kavali, Andhra Pradesh, India.
  • 2010: M.Tech in Energy management, Department of Physics, Sri Venkateswara University, Tirupati, Andhra Pradesh, India.
  • 2014: Ph.D in Physics, Sri Venkateswara University, Tirupati, Andhra Pradesh, India.

Thesis title: Concentration effect on spectroscopic properties of different rare earth ions doped strontium-lithium-bismuth-borate glasses.

 

Awards, scholarships and research stays:

  • Graduation topper in Physics, Prize of the Principal of Goverment Degree College, Rajampet, Andhra Pradesh, India, 2005.
  • University Grants Commission (U.G.C) Research Fellowships in Science for Meritorious Students: Sri Venkateswara University, Andhra Pradesh, India, 2011.
  • Council of Scientific and Industrial Research, Senior Research Fellowship: Sri Venkateswara University, Andhra Pradesh, India, 2013.
  • FAPESP Fellowship: Physics Institute of Sao Carlos, Sao Paulo University, Sao Carlos, Brazil, 2015.

  Other activities:

  • Reviewer of Journals : Journal of Non-Crystalline Solids, Optical Materials, Journal of Luminesce, Journal of Alloys and Compounds, ceramic international, Journal of Physics and Chemistry of Solids
  • Member of Andhra Pradesh Science Congress
Dr. Rajesh Dagupati
Dr. Rajesh Dagupati
Researcher

E-mail: rajesh.dagupati@tnuni.sk
Tel.: +421 32 7400 516
Office: n. 206