Dr. Amresh Bahadur

Assistant Professor
Contact Information:
09453788192(M) Fax:(+91 542 2368174)
Email Id:[email protected]

 
 
Academic Qualifications:
 
S. No.DegreeInstitutionYear
1.B.Sc.(Hons.)Banaras Hindu University1999
2.M.Sc.Banaras Hindu University2001
2.Ph.D.Banaras Hindu University2013
 
Current Research Projects:
 

S. No.Name of the Project DurationSource of FundingAmount of Funding (Rs)
1. Synthesis and Characterization and applications of some rare earth doped dual mode phosphor (P.I) 2018- 2021DST SERB, New Delhi44.26 lacs
 
Brief writeup on area of specialization/awards/achievements:
 

Our research areas are optical properties of rare earth doped materials. Specially, we prepare rare earth doped phosphors, polymers, quantum dot, glasses, etc. We study the structural and optical properties of prepared samples. The XRD, SEM and TEM are characterised for structural analysis. However, the UV-Vis-NIR absorption, FTIR, fluorescence, Upconversion, excited states lifetime, etc are measured for optical analysis. The rare earth doped materials are applicable in CFL, LED, temperature sensor, display devices, lasers, bi-imaging, enhancing the efficiency of solar cell, etc. We prepare bulk and nano-particles both. The properties of nano particles are quite different from their bulk form.

 
Awards and Achievements:
 

Qualified CSIR-NET in June 2006

 

List of 10 best Publications:

  1. Enhanced upconversion from Er3+/Yb3+ co-doped alkaline earth aluminates phosphor in presence Zn2+: A comparative study, AK Choudhary, A Dwivedi, A Bahadur, SB Rai, Journal of Luminescence 210, 135-141, 2019.
  2. Enhanced upconversion and downshifting emissions from Tm3+, Yb3+ co-doped CaZrO3 phosphor in the presence of alkali ions (Li+, Na+ and K+), A Maurya, A Dwivedi, A Bahadur, SB Rai, Journal of Alloys and Compounds 786, 457-467, 2019.
  3. Large enhancement in upconverted green emission intensity from Ho3+/Yb3+ co-doped Y2Ti2O7 phosphor in the presence of Zn2+, PK Vishwakarma, A Bahadur, A Maurya, SB Rai, Materials Research Bulletin, 2019.
  4. Enhanced upconversion emission and temperature sensor sensitivity in presence of Bi3+ ions in Er3+/Yb3+ co-doped MgAl2O4 phosphor, AK Choudhary, A Dwivedi, A Bahadur, TP Yadav, SB Rai, Ceramics International 44 (8), 9633-9642, 2018.
  5. Enhanced red emission from Eu3+, A+ (Li+, Na+, K+) co-doped CaZrO3 phosphor, A Maurya, A Bahadur, SB Rai, Journal of Luminescence 203, 714-722, 2018.
  6. Enhanced upconversion and downshifting emissions from Tb3+, Yb3+ co-doped CaZrO3 phosphor in presence of Li+ ions, A Maurya, A Bahadur, SB Rai, Methods and applications in fluorescence 7 (1), 015002, 2018.
  7. Down shifting and quantum cutting from Eu 3+, Yb 3+ co-doped Ca 12 Al 14 O 33 phosphor: a dual mode emitting material, RV Yadav, RS Yadav, A Bahadur, SB Rai, RSC Advances 6 (11), 9049-9056, 2016.
  8. Host-Sensitized NIR Quantum Cutting Emission in Nd3+ Doped GdNbO4 Phosphors and Effect of Bi3+ Ion Codoping, PK Shahi, P Singh, SB Rai, A Bahadur, Inorganic chemistry 55 (4), 1535-1541 29, 2016.
  9. Enhanced green upconversion photoluminescence from Ho3+/Yb3+ co-doped CaZrO3 phosphor via Mg2+ doping, A Maurya, RS Yadav, RV Yadav, SB Rai, A Bahadur, RSC Advances 6 (114), 113469-113477, 2016.
  10. Optical avalanche in Ho:Yb:Gd2O3 nanocrystals, Y Dwivedi, A Bahadur, SB Rai, Journal of Applied Physics 110 (4), 043103, 2011.
Full List of Publications:
  1. Spectroscopic study of Er: Sm doped barium fluorotellurite glass, A Bahadur, Y Dwivedi, SB Rai, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 77, 101-106, 2010.
  2. Spectroscopic study of Sm: Ce ions co-doped in barium fluoroborate glass, Y Dwivedi, A Bahadur, SB Rai, Journal of Non-Crystalline Solids 356 (33-34), 1650-1654, 2010.
  3. Optical avalanche in Ho:Yb:Gd2O3 nanocrystals, Y Dwivedi, A Bahadur, SB Rai, Journal of Applied Physics 110 (4), 043103, 2011.
  4. Structural and spectroscopic diagnosis of Eu: ZnO and Eu: Yb: ZnO glass and ceramics, A Bahadur, Y Dwivedi, SB Rai, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 91, 217-221, 2012.
  5. Optical properties of cerium doped oxyfluoroborate glass, A Bahadur, Y Dwivedi, SB Rai, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 110, 400-403, 2013.
  6. Enhanced luminescence and energy transfer study in Tb: Sm codoped lead fluorotellurite glass, A Bahadur, Y Dwivedi, SB Rai, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 118, 177-181, 2014.
  7. Infrared to infrared upconversion emission in Pr3+/Yb3+ co-doped La2O3 and La (OH) 3 nano-phosphors: A comparative study, RS Yadav, RK Verma, A Bahadur, SB Rai, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 142, 324-330, 2015.
  8. Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor, RS Yadav, RK Verma, A Bahadur, SB Rai, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 137, 357-362, 2015.
  9. Improved photo-luminescence behaviour of Eu 3+ activated CaMoO 4 nanoparticles via Zn 2+ incorporation, BP Singh, PV Ramakrishna, S Singh, VK Sonu, S Singh, P Singh, A Bahadur, RA Singh, SB Rai, RSC Advances 5 (69), 55977-55985, 2015.
  10. Enhanced Quantum Cutting via Li+ Doping from a Bi3+/Yb3+-Codoped Gadolinium Tungstate Phosphor, RV Yadav, RS Yadav, A Bahadur, AK Singh, SB Rai, Inorganic chemistry 55 (21), 10928-10935, 2016.
  11. Effect of Li+ ion sensitization and optical temperature sensing in Gd2O3: Ho3+/Yb3+, P Singh, PK Shahi, A Rai, A Bahadur, SB Rai, Optical Materials 58, 432-438, 2016.
  12. Role of Li+ on white light emission from Sm3+ and Tb3+ co-doped Y2O3 nano-phosphor, RS Yadav, RV Yadav, A Bahadur, TP Yadav, SB Rai, Materials Research Express 3 (3), 036201, 2016.
  13. Host-Sensitized NIR Quantum Cutting Emission in Nd3+ Doped GdNbO4 Phosphors and Effect of Bi3+ Ion Codoping, PK Shahi, P Singh, SB Rai, A Bahadur, Inorganic chemistry 55 (4), 1535-1541 29, 2016.
  14. Enhanced green upconversion photoluminescence from Ho3+/Yb3+ co-doped CaZrO3 phosphor via Mg2+ doping, A Maurya, RS Yadav, RV Yadav, SB Rai, A Bahadur, RSC Advances 6 (114), 113469-113477, 2016.
  15. Bismuth functionalized PVA film: field, plasmonic and pH effect on PVA originated broad photoluminescence, B Kumar, G Kaur, RK Verma, A Bahadur, SB Rai, RSC Advances 6 (32), 26984-26992, 2016.
  16. Enhanced white light emission from a Tm 3+/Yb 3+/Ho 3+ co-doped Na 4 ZnW 3 O 12 nano-crystalline phosphor via Li+ doping, RS Yadav, RV Yadav, A Bahadur, SB Rai, RSC Advances 6 (57), 51768-51776, 2016.
  17. Down shifting and quantum cutting from Eu 3+, Yb 3+ co-doped Ca 12 Al 14 O 33 phosphor: a dual mode emitting material, RV Yadav, RS Yadav, A Bahadur, SB Rai, RSC Advances 6 (11), 9049-9056, 2016.
  18. Effect of the concentration of the dopants (Er3+, Yb3+ and Zn2+) and temperature on the upconversion emission behavior of Er3+/Yb3+ co-doped SrAl2O4 phosphor, AK Choudhary, A Dwivedi, A Bahadur, SB Rai, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 185, 155-162, 2017.
  19. Multimodal emissions from Tb3+/Yb3+ co-doped lithium borate glass: upconversion, downshifting and quantum cutting, A Bahadur, RS Yadav, RV Yadav, SB Rai, Journal of Solid State Chemistry 246, 81-86, 2017.
  20. Enhanced red emission from Eu3+, A+ (Li+, Na+, K+) co-doped CaZrO3 phosphor, A Maurya, A Bahadur, SB Rai, Journal of Luminescence 203, 714-722, 2018.
  21. Enhanced upconversion and downshifting emissions from Tb3+, Yb3+ co-doped CaZrO3 phosphor in presence of Li+ ions, A Maurya, A Bahadur, SB Rai, Methods and applications in fluorescence 7 (1), 015002, 2018.
  22. Alkali ions effect on optical properties of Tm3+, Yb3+ co-doped gadolinium tungstate phosphor, RV Yadav, RS Yadav, AK Singh, A Bahadur, TP Yadav, SB Rai, Materials Chemistry and Physics 215, 277-284, 2018.
  23. Optical properties of Er3+, Yb3+ co-doped calcium zirconate phosphor and temperature sensing efficiency: effect of alkali ions (Li+, Na+ and K+), A Maurya, A Bahadur, A Dwivedi, AK Choudhary, TP Yadav, S. B. Rai, Journal of Physics and Chemistry of Solids 119, 228-237, 2018.
  24. Effect of Li+ on frequency upconversion and intrinsic optical bistability of Ho3+/Yb3+ co-doped gadolinium tungstate phosphor, RV Yadav, AK Singh, A Bahadur, TP Yadav, RS Yadav, SB Rai, Journal of Physics and Chemistry of Solids 119, 138-146, 2018.
  25. Enhanced upconversion emission of Er3+/Yb3+ and Er3+/Yb3+/Zn2+ doped calcium aluminate for use in optical thermometry and laser induced optical heating, AK Choudhary, SK Singh, A Dwivedi, A Bahadur, SB Rai, Methods and applications in fluorescence 6 (3), 035014, 2018.
  26. Enhanced upconversion emission and temperature sensor sensitivity in presence of Bi3+ ions in Er3+/Yb3+ co-doped MgAl2O4 phosphor, AK Choudhary, A Dwivedi, A Bahadur, TP Yadav, SB Rai, Ceramics International 44 (8), 9633-9642, 2018.
  27. Analysis of bright red-orange emitting Mn2+: ZnAl2O4 spinel nanophosphor, P Kumari, Y Dwivedi, A Bahadur, Optik 154, 126-132, 2018.
  28. Enhanced upconversion from Er3+/Yb3+ co-doped alkaline earth aluminates phosphor in presence Zn2+: A comparative study, AK Choudhary, A Dwivedi, A Bahadur, SB Rai, Journal of Luminescence 210, 135-141, 2019.
  29. Enhanced upconversion and downshifting emissions from Tm3+, Yb3+ co-doped CaZrO3 phosphor in the presence of alkali ions (Li+, Na+ and K+), A Maurya, A Dwivedi, A Bahadur, SB Rai, Journal of Alloys and Compounds 786, 457-467, 2019.
  30. Large enhancement in upconverted green emission intensity from Ho3+/Yb3+ co-doped Y2Ti2O7 phosphor in the presence of Zn2+, PK Vishwakarma, A Bahadur, A Maurya, SB Rai, Materials Research Bulletin, 2019

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