Research Interest

Focus- Renewable Energy & Clean Environment

  1. Solid State Inorganic Chemistry of Metal Chalcogenides/Halides
  2. Thermoelectric Materials- Waste Heat to Electrical Energy.
  3. 2D  layered Materials including nanosheets/nanostructures
  4. Topological Insulators and Dirac Semimetal
  5. Synchrotron X-ray Based Techniques- Diffraction and Pair distribution function (PDF)
  6. Water Purification
  7. Perovskite halides

Recent Discoveries

1. Localized Vibrations of Bi Bilayer Leading to Ultralow Lattice Thermal Conductivity and High Thermoelectric Performance in Weak Topological Insulator n-Type BiSe, J. Am. Chem. Soc., 2018.
2. .Soft Phonon Modes Leading to Ultralow Thermal Conductivity and High Thermoelectric Performance in AgCuTe, Angew. Chem. Int. Ed., 2018, 57, 15, 4043-4047.

3. Low Thermal Conductivity and High Thermoelectric Performance in (GeTe)1–2x(GeSe)x(GeS)x: Competition between Solid Solution and Phase Separation, J. Am. Chem. Soc., 2017, 139, 9382. 4. Intrinsic rattler-induced low thermal conductivity in zintl type TlInTe2, J. Am. Chem. Soc., 2017,139, 4350.
5.  High power factor and enhanced thermoelectric performance of SnTe-AgInTe2: Synergistic effect of resonance level and valence band convergence, J. Am. Chem. Soc., 2016, 138, 13068. 6. The origin of ultralow thermal conductivity in InTe: Lone-pair-induced anharmonic rattling, Angew. Chem. Int. Ed., 2016, 55, 7592.


7.  The origin of low thermal conductivity in Sn1-xSbxTe: phonon scattering via layered intergrowth nanostructures, Energy Environ. Sci.,2016, 9, 2011. 8.Temperature Dependent Reversible p–n–p Type Conduction Switching with Colossal Change in Thermopower of Semiconducting AgCuS, J. Am. Chem. Soc., 2014, 136 ,12712.
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