Advanced Material Research Lab

About The Lab
Material Science is one of the signatures thrust areas of research at Rabindranath Tagore University. For the execution of research in this area, ‘Advanced Material Research Lab’ has been established. The Lab is well equipped with several modern instruments for the synthesis of materials, such as Magnetic Stirrer, Hot Plate, Heating Mantle, Rota Mantle, Autoclave, Table Top Hydraulic Press, Vertical Furnace, High Temperature Rectangular Muffle Furnace for annealing the sample at air atmosphere and Tubular Furnace attached with H2(5%)/N2 (95%) cylinder, for annealing of the sample at high temperature under reducing atmosphere. For the measurement of Photoluminescence Emission Spectra of solid sample, one Spectrometer from ‘Ocean Optics’ is also provided in the lab.

Vision Mission & Scientific Aims of AMRL

To create a vibrant atmosphere of research in the area of ‘Material Science’ along with ‘Inter-Disciplinary Research’ through rational designing and innovation.

Our Research

Our research at the interface of physics, chemistry, and materials science, is focused on the crystal chemistry, and crystal-structure — property relations in functional inorganic materials. The functions of interest to us include phosphors, magnetics, thermoelectrics, ferroics, photovoltaics, and redox-activity (for battery applications). A unifying theme in almost every aspect of our work is the compositional tuning of the properties of extended solids through solid solution; sometimes referred to (by us) as the game of x, as, for example, in La 2–x Sr x CuO 4.

Our research at the interface of Chemistry and Material Science is focused on

• The development of novel inorganic based ‘Luminescent Materials’ for the application in white Light Emitting Diodes (w-LEDs).
• The novel materials can be a single composition multi-centred phosphor or nUV/blue excitable blue, green, yellow and red emitting phosphor.
• The utilization of 'Green' solution based synthesis methodology is the main paradigm of our Research.
• A unifying theme of our research is the compositional tuning of the properties of extended solids through solid solution; sometimes referred to as the game of x and y, as, for example, in Sr 2(1-x-y/2) Eu 2x La y Si 1-y Al y O 4.
• Development of ‘Advanced Luminescence Materials’ so called ‘Quantum Cutters’ and ‘Upconversion’ phosphors for the application in solar cell as ‘Spectral Converter’ for ‘Smart Photon Management’.
• Fabrication of phosphor-converted (pc)-LED using as-synthesized phosphors and application of the fabricated pc-LED as ‘light recipe’ in “vertical indoor farming for soil-less hydroponic” horticulture system.
• “Conduction Band (CB) engineering” mediated design and development of persistent phosphor for the fabrication of Glow Paint.
• Exploration of ‘Porous Materials’ based composites for
  
  

AMRL Head

• Tailoring the luminescent properties of Ca₉La(PO₄)₅(SiO₄)F ₂ :1 mol% Eu 3+ phosphor via doping of chloride, molybdate, vanadate, sulfate and tungstate ions by Chaitali M. Mehare  Yatish R. Parauha, Vibha Chopra, Sudeshna Ray, N. S. Dhoble, Chandan Ghanty and S. J. Dhoble Journal of Materials Science: Materials in Electronics(accepted) [DOI 10.1007/s10854-020-02891-0]
 
• Enhanced photovoltaic performance of Y₂O₃:Ho³⁺/Yb³⁺ upconversion nanophosphor based DSSC and investigation of color tunability in Ho³⁺/Tm³⁺/Yb³⁺ tridoped Y₂O₃, P Tadge, R. S. Yadav, P. Vishwakarma, S. B. Rai, T. M. Chen, S. Sapra and S. Ray, Journal of Alloys and Compounds, 153230.


• Upconversion and luminescence temperature sensitivity of Er³⁺ ions in yttrium oxysulfate nanophosphor, by Miguel Andr's Hernández-Rodríguez, Prachi Tadge, Antonio Diego Lozano-Gorrín, Ulises R. Rodríguez-Mendoza, Dr.; Sudeshna Ray, Victor Lavin, “Optical Materials”, 95 (2019) 109197.


• Synthesis, luminescence and application of BaKYSi₂O₇:Eu²⁺: A new blue-emitting Phosphor for near-UV White-light LED, by Sudeshna Ray, Prachi Tadge, Somrita Dutta, T. M. Chen, Govind Nair and S. J. Dhoble, “Ceramics International”, 44 (2018), 8334.


• Impact of Ga³⁺ on the phase transition and luminescence properties of substituted Sr₂SiO₄:Eu²⁺ phosphor synthesized from a highly homogeneous oxide precursor based on a novel water-soluble silicon compound, Sudeshna Ray, Prachi Tadge, Govind Nair and S. J. Dhoble, “Ceramics International”, 44 (2018) 5506.


• Size and shape-tailored hydrothermal synthesis and characterization of nanocrystalline LaPO₄:Eu³⁺ phosphor, Sudeshna Ray, Govind B. Nair, Prachi Tadge , Nidhi Malvia , Vinita Rajput, Vibha Chopra and S. J. Dhoble, “J. Lumin”, 194 (2018) 64.


• Analysis of growth kinetics and impact of NH₃ on the morphology evolution of hexagonal-prism shaped Y₄O(OH)₉NO₃/Y₂O₃ single crystals, S Ray, G. B. Nair, S. J. Dhoble, H Kato, M Kakihana and T. M. Chen, “Materials Research Bulletin”, 95 (2017) 597.


• Structural and spectroscopic characterizations of a new near-UV-converting cyan-emitting RbBaScSi₃O₉:Eu²⁺ phosphor with robust thermal performance” by Sudeshna Ray, Prachi Tadge, S.J. Dhoble, Govind B. Nair, Journal of Alloys and Compounds, 713 (2017) 138.


• Pressure-induced amorphization of YVO₄:Eu³⁺ nanoboxes" by Ruiz-Fuertes, Javier; Gomis,Oscar, Leon-Luis Sergio, Rademacher Nadine, Manjon Herrera Francisco, Ray Sudeshna and Victor Lavin., “Nanotechnology”, 27 (2015) 025701.


• Broadband, site selective and time resolved photoluminescence spectroscopic studies of finely size-modulated Y₂O₃:Eu³⁺ phosphors synthesized by a complex based precursor solution method, S Ray, F. Manjon and V. Lavin., "Current Applied Physics" 14 (2014) 72.


• KSrScSi₂O₇:Eu²⁺: A new near-ultraviolet blue-emitting phosphor with high efficiency and excellent thermal stability, Sudeshna Ray, Y-C Fang and Teng-Ming Chen. "RSC Advances" 3 (2013) 16387.


• Selective synthesis, characterization and photoluminescence studies of YPO₄:Eu³⁺ nanorods and nanoparticles, S. Ray, A Banerjee and P Pramanik, “Materials Research Bulletin” 45 (2010) 870.


• High-pressure structural and lattice dynamical study of HgWO4, F. J. Manjón, J. López-Solano, and S. Ray. “Physical Review B” 82 (2010) 035212.


• High pressure structural phase transitions in CuWO₄, J. Ruiz-Fuertes, D. Errandonea, R. Lacomba-Perales, A. Segura, J. González, F. Rodríguez, F. J. Manjón, S. Ray,“Physical Review B” 81 (2010) 224115.


• Shape-controlled synthesis, characterization and photoluminescence properties of YVO₄:Dy³⁺/Eu³⁺ phosphor, S. Ray, A. Banerjee and P. Pramanik “Materials Science and Engineering B” 156 (2009) 10.


• A novel rock-like nanoarchitecture of YVO₄:Eu³⁺ phosphor: selective synthesis, characterization and luminescence behavior, S. Ray, A Banerjee and P. Pramanik, “Journal of Material Science” 45 (2009) 259.


• Photoluminescence properties of nanocrystalline Tb³⁺ doped Y₂O₃ phosphor prepared through a novel synthetic route, S. Ray, A Patra and P Pramanik “Optical Materials” 30 (2007) 608.


• Optical properties of nanocrystalline Y₂O₃:Eu³⁺, S. Ray, P Pramaik, A Singha and A Roy,“Journal of Applied Physics” 97 (2005) 094312.


• High pressure theoretical and experimental study of HgWO₄, J. López-Solano, P. Rodríguez-Hernández, A. Muñoz, D. Santamaría-P'rez, F.J. Manjón, S. Ray, O. Gomis, Mollar, V. Panchal and D. Errandone “High Pressure Research” 31(2011) 58.
  
  
• The 12^th International Meeting on Information Display, Daegu, S Ray, K Toda, S Kamei, T. Ishigaki, K Uematsu, M Sato, H Kato, Korea 42.
  
  

Patents filed 

Collaborations OF AMRL