Dr Sudipta Som

Assistant Professor, Physics



Dr Sudipta Som



24/09/2014- 07/10/2022         Postdoctoral Fellow

                                                Dept. of Chemical Engineering, National Taiwan University, Taiwan

01/08/2013- 21/09/2014         Postdoctoral Fellow

                                                Dept. of Physics, University of the Free State, South Africa




#1Project: Development of stable organic-inorganic perovskite quantum dots for micro LEDs

Industry consultant:BENQ COMPUTER

Contribution:Work as team leader

Status: Reached TRL 3

#2Project: Sharp band red phosphors with high moisture and temperature stability for LEDs

Industry consultant: EDISON OPTO CORPORATION

Contribution:Work as second team leader

Status: Reached TRL 5

#3Project: Development of color-tuned afterglow materials based on color conversion

Industry consultant: NEMOTO, JAPAN

Contribution:Work as the sole researcher

Status: Reached TRL 3


#4Project: Development of NIR materials with broadband emissions ranging from 650- 1200 nm

Industry consultant: DAN ENTERTAINMENT PVT. LTD.

Contribution:Work as team leader

Status: Reached TRL 2

#5Project: Development of cathode materials for Li-ion batteries

Industry consultant:BENQ COMPUTER

Contribution:Work as a coresearcher

Status: Reached TRL 1


#6Project: Development of anode materials for high-power Li-ion batteries

Industry consultant:XINGFOX ENERGY

Contribution:Work as a coresearcher

Status: Reached TRL 1


Vesta/ Proficient in data processing and analysis software (e.g. Origin, Basic Matlab)/ MDI Jade/ Mendeley/ Rietveld Refinement


Preparation of luminescent materials and electrodes

Powder:          Combustion synthesis, Hydrothermal synthesis, Sol-gel process, Sol-gel combustion, Co-

Precipitation process, Solid State reaction, Microwave synthesis, Microemulsion synthesis

Colloidal:        Hot injection, ligand-assisted room temperature precipitation, Ultrasonication



Structural:         X-Ray Diffraction, Scanning Electron Microscopy, FTIR Spectroscopy, Atomic Force

Microscopy, X-Ray Photo Electron Spectroscopy, Time of Flight SIMS, X-Ray Fluorescence

Optical:             Absorption Spectroscopy, Diffuse reflectance spectroscopy

Luminescence:  Photoluminescence, Thermoluminescence

Solar Cell:      Solar Simulator

Li ion battery:   Electrochemical station (Charge/ discharge tester)


Thin Film evaporation techniques: Experienced in Chemical vapor deposition (CVD), Pulsed laser

deposition, RF sputtering, and Thermal vapor deposition

Wet thin Film deposition techniques:Experienced in Spin Coating, blade coating, and dip coating.



2014 : Ph.D. (Applied Physics) – Indian School of Mines (Now Known as IIT ISM), Dhanbad, India

2010 : M. Sc. (Applied Physics) – Indian School of Mines (Now Known as IIT ISM), Dhanbad, India (1st class)

2008  : B. Sc. (Physics) St. Xavier’s College, University of Calcutta, West Bengal, India (1st class)



Number of papers: 112 (SCI, Web of Science, Scopus indexed, and UGC listed); Number of books and chapters: 09; Number of conferences: 35; Number of edited books: 02; Number of citations: 3741; Author h index: 33; i10 index: 74



Vacuum – Guest editor
Materials Today Proceedings – Guest editor


 # first author, * corresponding author

Best 30 publications

  1. Highly efficient and thermally stable Eu3+ activated phosphate based phosphors for wLEDs: An experimental and DFT study
    Mohan Lal Meena, Chung-Hsin Lu, SudiptaSom, Rajneesh Chaurasiya, S.D. Lin
    Journal of Alloys and Compounds 895 162670 (2022).( )
    Impact Factor: 6.371
    ISSN No. 0925-8388
  1. Incorporation of zinc ions towards low toxicity and high stability of organic-inorganic methyl ammonium lead bromide perovskite QDs via ultrasonication route for white-LEDs
    Rajan Kumar Singh, Pushkal Sharma, Chung-Hsin Lu, Ranveer Kumar, SudiptaSom, Somrita Dutta, Neha Jain, Mohan Lal Meena, Jai Singh, Teng-Ming ChenJournal of Molecular Liquids337 116557 (2021). (
    Impact Factor: 6.165
    ISSN No. 0167-7322
  1. Synthesis and spectroscopic characterization of CsPbBr3/Cs4PbBr6 perovskites synthesized via the microwave-assisted heating process for backlight display devices
    Chung-Hsin Lu, Yi-Hsin Liu, Mohan Lal Meena, SudiptaSom
    Organic Electronics 91 106079 (2021). (
    Impact Factor: 3.721
    ISSN No. 1566-1199
  1. Synthesis and design of NaYF4microprisms via a microwave- assisted approach for highly sensitive optical thermometry applications
    SudiptaSom*, Chung- Hsin Lu, Che- Yuan Yang, Subrata Das
    Journal of the American Ceramics Society104 5168 (2021). (
    Impact Factor: 3.094
    ISSN No. 0002-7820
  1. CH3NH3Pb1–xCoxBr3–2xCl2x Perovskite Quantum Dots for Wide-Color Backlighting
    Rajan Kumar Singh, Pushkal Sharma, Ranveer Kumar, SudiptaSom, Somrita Dutta, Neha Jain, Rajneesh Chaurasiya, Mohan Lal Meena, Jian-SyunHo, Shu-Wen Dai, Jai Singh, Chung-Hsin Lu, Hao-Wu Lin
    ACS Applied Nano Materials4 (1) 717-728 (2021). (
    Impact Factor: 5.097
    ISSN No.2574-0970
  1. Rapid and room temperature synthesis of MAPb1−xSnxBr3−2xCl2x perovskite quantum dots with enhanced lifetime in warm WLEDs: A step towards environmental friendly perovskite light harvester
    Rajan Kumar Singh, SudiptaSom, Somrita Dutta, Neha Jain, Jai Singh, Ranveer Kumar, Chung-Hsin Lu
    Chemical Engineering Journal391 123629 (2020). (
    Impact Factor: 13.273
    ISSN No.1385-8947
  1. Multisite-Occupancy-Driven Intense Narrow-Band Blue Emission from Sr5SiO4Cl6:Eu2+ Phosphor with Excellent Stability and Color Performance
    Somrita Dutta, SudiptaSom#, Mohan Lal Meena, R. Chaurasiya, Teng-Ming Chen
    Inorganic chemistry59 1928- 1939 (2020). (
    Impact Factor: 4.825
    ISSN No.0020-1669
  1. Facile synthesis of Eu2+ activated dual light emitting barium silicate phosphors for warm-white light emitting diodes
    SudiptaSom*, Peng-HsuanKuo, Chung-Hsin Lu
    Journal of Alloys and Compounds790 1060- 1064 (2019). (
    Impact Factor:  5.316
    ISSN No. 0925-8388
  1. Synthesis of Li+-ion activated NaYF4: Er3+/Yb3+ phosphors via a modified solid-state process for latent fingerprint detection
    SudiptaSom*, Che-Yuan Yang, Chung-Hsin Lu, Subrata Das
    Ceramics International45 (5) 5703-5709 (2019). (
    Impact Factor: 4.527
    ISSN No.0272-8842
  1. Synthesis of Sr2Si5N8:Ce3+ phosphors for white LEDs via efficient chemical vapor deposition
    Che-Yuan Yang, SudiptaSom*, Subrata Das, Chung-Hsin Lu
    Scientific reports7 (1) 1-14 (2017). (
    Impact Factor: 4.379
    ISSN No.2045-2322
  1. Structural and luminescence responses of CaMoO4nano phosphors synthesized by hydrothermal route to swift heavy ion irradiation: Elemental and spectral stability
    S Dutta, S Som#, AK Kunti, Vijay Kumar, SK Sharma, HC Swart, HG Visser
    ActaMaterialia124 109- 119 (2017). (
    Impact Factor: 8.203
    ISSN No.1359-6454
  1. Microwave assisted hydrothermal synthesis of spherical Y2O3 ceramic powder coated by Eu3+: bright red emitting media with >80% luminescence efficiency
    SudiptaSom*, Subrata Das, Che- Yuan Yang and Chung- Hsin Lu
    Ceramics International42 8022 (2016).(
    Impact Factor: 4.527
    ISSN No.0272-8842
  1. Enhanced upconversion of NaYF4:Er3+/Yb3+phosphors prepared via the rapid microwave-assisted hydrothermal route at low temperature: phase and morphology control
    SudiptaSom*, Subrata Das, Che-Yuan Yang and Chung-Hsin Lu
    Optics Letters 41 464 (2016). (
    Impact Factor: 3.776
    ISSN No.0146-9592
  1. Red-light-emitting inorganic La2CaZnO5 frameworks with high photoluminescence quantum efficiency: Theoretical approach
    Vijay Kumar, S Som*, S Dutta, S Das, and H. C. Swart
    Materials & design 93 203 (2016).(
    Impact Factor: 7.991
    ISSN No.0264-1275
  1. A comparative study on the influence of 150 MeV Ni7+, 120 MeV Ag9+ and 110 MeV Au8+ swift heavy ions on the structural and thermoluminescence properties of Y2O3: Eu3+/Tb3+ nanophosphor for dosimetric applications
    Som*, Subrata Das, S. Dutta, H. G. Visser, Mukesh Kumar Pandey, Ritesh Kumar Dubey, S. K. Sharma, S. P. Lochab.
    Journal of Materials Science 51 1278 (2016).(
    Impact Factor: 4.220
    ISSN No.0022-2461
  1. Dopant distribution and influence of sonication temperature on the pure red light emission of mixed oxide phosphor for solid-state lighting
    Som*,#, Vijay Kumar, Vinod Kumar, MukutGohain, Anurag Pandey, M.M. Duvenhage, J. J. Terblans, H. C. Swart, B.C.B. Bezuindenhoudt
    Ultrasonic Sonochemistry28 79 (2016).  (
    Impact Factor: 7.491
    ISSN No.1350-4177
  1. CaTiO3: Eu3+, a potential red long lasting phosphor: energy migration and characterization of trap level distribution
    Som*, S. Dutta, Vijay Kumar, Anurag Pandey, Vinod Kumar, A K Kunti, J. Priya, S. K. Sharma J. J. Terblans, H. C. Swart
    Journal of Alloys and Compounds,622 1068 (2015).(
    Impact Factor: 5.316
    ISSN No. 0925-8388
  1. Tunable and white emission from ZnO:Tb3+ nanophosphors for solid state lighting applications
    Vinod Kumar, S. Som, Vijay Kumar, Vinay Kumar, O.M. Ntwaeaborwa, E. Coetsee,
    H.C. Swart
    Chemical Engineering Journal, 255 541 (2014). (
    Impact Factor: 13.273
    ISSN No.1385-8947
  1. Enhanced upconversion and temperature sensing study of Er3+-Yb3+codoped tungsten-tellurite glass
    Anurag Pandey, S. Som, Vijay Kumar, Vinod Kumar, Kaushal Kumar, Vineet Kumar Rai, H. C. Swart
    Sensors and Actuators B, 202 1305 (2014). (
    Impact Factor: 7.460
    ISSN No.0925-4005
  1. Energy transfer phenomena and colour tunability in Y2O2S:Eu3+/Dy3+ micro-fibers for white emission in solid-state lighting application
    Som*,#, P. Mitra, Vijay Kumar, Vinod Kumar, J. J. Terblans, H. C. Swart, S. K. Sharma
    Dalton Transaction, 43 9860 (2014). (
    Impact Factor: 4.390
    ISSN No.1477-9226
  1. Effect of annealing on the structural, morphological and photoluminescence properties of ZnO thin films prepared by spin coating
    Vinod Kumar, Vijay Kumar, S Som, A Yousif, Neetu Singh, OM Ntwaeaborwa, A Kapoor, H. C. Swart
    Journal of Colloids and Interface, 4288 (2014). (
    Impact Factor: 8.128
    ISSN No.0021-9797
  1. Effect of Eu doping on the photoluminescence properties of ZnO nanophosphors for red emission application
    Vinod Kumar, Vijay Kumar, S Som, OM Ntwaeaborwa, H. C. Swart
    Applied Surface Science, 308 419 (2014). (
    Impact Factor: 6.707
    ISSN No.0169-4332
  1. Defect correlated fluorescent quenching and electron phonon coupling in the spectral transition of Eu3+ in phosphor host for pure red emission in solid state lighting application
    Som*,#, A K Kunti, Vijay Kumar, Vinod Kumar, S. Dutta, M. Chowdhury, S. K. Sharma J. J. Terblans, H. C. Swart,
    Journal of Applied Physics, 115 193101 (2014). (
    Impact Factor: 2.546
    ISSN No.0021-8979
  1. Influence of ultrasonication times on the tunable colour emission of ZnO nanophosphors for lighting applications.
    Vinod Kumar, H.C. Swart, MukutGohain, Vijay Kumar, S. Som, B.C.B Bezuindenhoudt, O.M. Ntwaeaborwa.
    UltrasonicsSonochemistry, 21 1549 (2014). (
    Impact Factor: 7.491
    ISSN No.1350-4177
  1. Role of surface and deep-level defect on the emission of tin oxide quantum dots.
    Vinod Kumar, Vijay Kumar, S Som, J.H. Neethling, Mike Lee, O.M. Ntwaeaborwa, H.C. SwartNanotechnology, 25135701(2014). (
    Impact Factor: 3.874
    ISSN No.0957-4484
  1. A comparative investigation on ion impact parameters and TL response of Y2O3:Tb3+nano phosphor exposed to swift heavy ions for space dosimetry.
    S Som*,#, S Dutta, M Chodhury, Vijay Kumar, Vinod Kumar, Hendric C Swart and S K Sharma.
    Journal of Alloys and Compounds, 5895 (2014). (
    Impact Factor: 5.316
    ISSN No. 0925-8388
  1. Swift heavy ion irradiation induced modification in structural, optical and luminescence properties of Y2O3:Tb3+ nanophosphor
    S Som*,#, S Dutta, Vijay Kumar, Vinod Kumar, H C Swart, S K Sharma
    Journal of Luminescence, 146 162 (2014). (
    Impact Factor: 3.599
    ISSN No.0022-2313
  1. Luminescence and photometric characterization of K+ compensated CaMoO4:Dy3+ nanophosphors
    S. Dutta, S. Som* and S. K. Sharma
    Dalton Transactions,42 9654 (2013). (
    Impact Factor: 4.39
    ISSN No.1477-9226
  1. Morphology, ion impact, and kinetic parameters of swift heavy-ion-induced Y2O3:Dy3+ phosphor
    Som*, S.K.Sharma and S.P.Lochab
    Phys. Status Solidi A,210 1624 (2013). (
    Impact Factor: 2.821
    ISSN No.0031-8965

  2.  Eu3+/ Tb3+codoped Y2O3 nanophosphors: Rietveld refinement, Bandgap and Photoluminescence optimization.
    Som*, S.K.Sharma
    Journal of Physics D: Applied Physics,45 415102 (2012). (
    Impact Factor: 3.169
    ISSN No.0022-3727


  1. Metal oxides based materials for display devices, Mohan Lal Meena, SudiptaSom#, Chung-Hsin Lu*, Ranveer Singh Badgoti, Somrita Dutta, Rajan Kumar Singh, Shawn D. Lin*, H. C. Swart, Metal oxide heterostructure and their application (ISBN 9780323852418) ), Publisher Elsevier.
  2. Intrinsic defect engineering of metal oxides for lighting applications, Mohan Lal Meena, Rajneesh Chaurasiya, SudiptaSom#, Chung-Hsin Lu*, Somrita Dutta and Shawn D. Lin* “”, Metal Oxide Defects: Fundamentals, Design, Development and Applications (ISBN:9780323855884), Publisher Elsevier.
  3. Luminescent nanomaterials: A step towards solid-state lighting and display, Mohan Lal Meena, SudiptaSom#, Chung-Hsin Lu*, Somrita Dutta, Rajan Kumar Singh, Shawn D. Lin*, Luminescent Nanomaterials (ISBN:9789814968119), Jenny Stanford Publishing.
  4. Trapping Parameters of Thermally Stimulated Luminescence Glow Curves in Y2O3:Tb3+ Nanophosphor, Som*, S.K. Sharma, S P Lochab, Advanced Nanomaterials and Nanotechnology, Springer, 143, (2013) 191-202.
  5. Swift Heavy Ion Synthesis and Modifications of Nanophosphors for Dosimetric Application: Effect of Swift Heavy Ion Irradiation, SudiptaSom*, Somrita Dutta, Vijay Kumar, Hendrik C. Swart,Emerging SynthesisTechniques for Luminescent Materials, IGI Global, 1, (2018) 1- 25.
  6. Lead-free hybrid perovskite light-harvesting material for QD-LED application, Rajan Kumar Singh, Neha Jain, SudiptaSom#, Somrita Dutta, Jai Singh and Ranveer Kumar, Perovskite Materials, Devices and Integration, Intech Open, London, United Kingdom, ISBN:978-1-78985-072-7. DOI:10.5772/intechopen.86836 (2019)
  7. Development in the innovation of lead halide based perovskite quantum dots fromrare earth doped garnet based phosphors for light-emitting diodes, Rajan Kumar Singh, Neha Jain, SudiptaSom#, Somrita Dutta, Jai Singh, Ranveer Kumar, T.M.Chen and H. C. Swart, Spectroscopy of Lanthanide Doped Oxide Materials, Elsevier Publication (Woodhead Publishing, Cambridge, UK) ISBN: 9780081029350 

BOOK (2)

  1. Sharp line Red-emitting polyborate phosphor for light applications, SudiptaSom*,#, Somrita Dutta, Vikas Dubey,ISBN: 978-3-330-00096-4, Lambert Academic Publishing (2016).
  2. Luminescent Materials in display and biomedical applications, Vikas Dubey,SudiptaSom*, Vijay Kumar, ISBN: 978-0-367-11212-7, CRC Press, Taylor & Francis Group (2021).