Assistant Professor

Dr Ventrapati Pavan Kumar

Department of Chemistry

Interests

  1. Thermoelectric Materials and Modules
  2. Flexible Semiconductors
  3. Solid State and Materials Chemistry

Faculty Details

Education

2004

Acharya Nagarjuna University, India
BSc

2006

Andhra University, India
MSc

2014

Indian Institute of Technology Madras, India
PhD

Experience

  • December 2024 – Present – Assistant Professor – SRM University-AP (Amaravati, India)
  • July 2022 – November 2024 – Postdoctoral Researcher - Aarhus University, Department of Chemistry (Aarhus, Denmark)
  • October 2019 – October 2021 – Scientific Researcher - Laboratoire CRISMAT / CNRS (Caen, France)
  • October 2018 – September 2019 – Postdoctoral Researcher - Institute Jean Lamour / CNRS (Nancy, France)
  • January 2016 – September 2018 – Scientific Researcher - Laboratoire CRISMAT / CNRS (Caen, France)
  • September 2014 – December 2015 – Research Associate - IIT Madras (Chennai, India)

Research Interests

  • Design, synthesis, and structural characterization of chalcogenide and intermetallic-based materials for sustainable thermoelectric applications
  • Crystal growth of low dimensional metal chalcogenides for flexible thermoelectric devices (wearable electronics and IoT devices)
  • High-entropy engineering for efficient thermoelectric performance
  • Electrical and thermal properties
  • Spark Plasma sintering (SPS) process
  • Development of thermoelectric modules for waste heat recovery

Awards & Fellowships

  • 2019 - Research work on Colusites was published in the prestigious CNRS Actualities
  • 2019 – Research work on Colusites was published in ILL Annual report
  • 2019 - Newton International Fellowship from the Royal Society of Chemistry
  • 2007 – CSIR-NET and GATE – India.

Publications

  • Influence of Cationic Ordering on the Lattice Dynamics of Monoclinic Cu5Sn2S7 and Cubic Cu5Sn2S6.65Cl0.35 Sulfides - C. Candolfi, L. Le Gars, G. Guélou, V. Pavan Kumar, C. Prestipino, M. Pasturel, P. Levinský, P. Lemoine, B. Raveau, X. Shen, O. I Lebedev, E. Guilmeau, J. Phys. Chem. C, 128 14075 (2024) DOI: 10.1021/acs.jpcc.4c03489
  • Engineering Transport Properties in Interconnected Enargite‐Stannite Type Cu2+xMn1−xGeS4 Nanocomposites - V Pavan Kumar, S. Passuti, B. Zhang, S. Fujii, P. Boullay, B. Raveau, P. Lemoine, N. Barrier, X. Zhou, M. Yoshiya, K. Suekuni, E. Guilmeau, Angewandte Chemie, 134 e2022106 (2022). DOI: 10.1002/ange.202210600
  • Achieving High Thermoelectric Performance in Mixed Natural‐Synthetic Tetrahedrites - P. Levinský, V. Pavan Kumar, A. Dauscher, J. Hejtmánek, C. Candolfi, B. Lenoir, ChemNanoMat, 8 e20220036 (2022). DOI: 10.1002/cnma.202200364
  • Long-Range Cationic Order Collapse Triggered by S/Cl Mixed-Anion Occupancy Yields Enhanced Thermoelectric Properties in Cu5Sn2S7 - G. Guelou, V. Pavan Kumar, V. Carnevali, O. I. Lebedev, B. Raveau, C. Couder, P.Lemoine, B. Malaman, C. Candolfi, B. Lenoir, R. Al Rahal Al Orabi, M. Fornari, and E. Guilmeau, Chemistry of Materials, (2021). DOI: 10.1021/acs.chemmater.1c03434
  • Local-Disorder-Induced Low Thermal Conductivity in Degenerate Semiconductor Cu22Sn10S32 - V. Pavan Kumar, P. Lemoine, V. Carnevali G. Guelou, O. I. Lebedev, B. Raveau, R. Al Rahal Al Orabi, M. Fornari, C. Candolfi, C. Prestipino, B. Malaman, K. Suekuni and E. Guilmeau, Inorganic Chemistry, 60 16273 (2021). DOI: 10.1021/acs.inorgchem.1c02105
  • Ordered sphalerite derivative Cu5Sn2S7: a degenerate semiconductor with high carrier mobility in the Cu–Sn–S diagram - V. Pavan Kumar, P. Lemoine, V. Carnevali G. Guelou, O. I. Lebedev, P. Boullay, B. Raveau, R. Al Rahal Al Orabi, M. Fornari, C. Prestipino, D. Menut, C. Candolfi, B. Malaman and E. Guilmeau, Journal of Material Chemistry A, 9 10812 (2021). DOI:10.1039/D1TA01615F
  • Low-temperature transport properties of n-type layered homologous compounds Bi8−xSbxSe7 - V. Pavan Kumar, S. Misra, G. Delaizir, A. Dauscher, B. Lenoir and C. Candolfi, Journal of Material Chemistry C, 8 14037 (2020). DOI: 10.1039/D0TC03935G
  • Transport properties and electronic density-of-states of Zn-doped colusite Cu26Cr2Ge6S32 - V. Pavan Kumar, S. Mitra, G. Guelou, A. R. Supka, P. Lemoine, B. Raveau, R. Al Rahal Al Orabi, M. Fornari, K. Suekuni and E. Guilmeau, Applied Physics Letters, 117 173902 (2020); DOI: 1063/5.0023712
  • Time-Resolved In Situ Neutron Diffraction Study of Cu22Fe8Ge4S32 Germanite: A Guide for the Synthesis of Complex Chalcogenides - L. Paradis‐Fortin, P. Lemoine, C. Prestipino, V. Pavan Kumar, B. Raveau, V. Nassif, S. Cordier, and E. Guilmeau, Chemistry of Materials, 32 8993 (2020), DOI:10.1021/acs.chemmater.0c03219
  • Toppling the transport properties with cationic over-stoichiometry in thermoelectric colusite, [Cu26Cr2Ge6]1+δS32 - G. Guelou#, V. Pavan Kumar#, A. Bourhim, P. Lemoine, B. Raveau, A. R. Supka, O. I. Lebedev, R. Al Rahal Al Orabi, M. Fornari, K. Suekuni and E. Guilmeau, ACS Applied Energy Materials, 3 4180 (2020), DOI: 10.1021/acsaem.0c00726
  • Structure, microstructure and thermoelectric properties of germanite-type Cu22Fe8Ge4S32 compounds - L. Paradis‐Fortin, G. Guelou, V. Pavan Kumar, P. Lemoine, V. Caignert, C. Prestipino, G.R. Durand, S. Cordier, O.I. Lebedev and E. Guilmeau, Journal of Alloys and Compounds, 831 154767 (2020). DOI: 10.1016/j.jallcom.2020.154767
  • Thermal stability of the crystal structure and electronic properties of the high power-factor thermoelectric colusite Cu26Cr2Ge6S32 - P. Lemoine, V. Pavan Kumar, G. Guelou V. Nassif, B. Raveau, and E. Guilmeau, Chemistry of Materials, 32 830 (2020). DOI: 10.1021/acs.chemmater.9b04378
  • Copper rich thermoelectric sulfides: size mismatch effect and chemical disorder in the [TS4]Cu6 complexes of Cu26T2Ge6S32 (T = Cr, Mo, W) colusite - V. Pavan Kumar, G. Guelou, P. Lemoine, B. Raveau, A. R. Supka, R. Al Rahal Al Orabi, M. Fornari, K. Suekuni and E. Guilmeau, Angewandte Chemie, 58 15455 (2019). DOI: 10.1002/anie.201908579
  • High power factors of Thermoelectric Colusites Cu26T2Ge6S32 (T = Cr, Mo, W): Toward Functionalization of the conductive “Cu-S” Network - V. Pavan Kumar, A. R. Supka, O. I. Lebedev, P. Lemoine, B. Raveau, K. Suekuni, V. Nassif, R. Al Rahal Al Orabi, M. Fornari and E. Guilmeau, Advanced Energy Materials, 9 1803249 (2019). DOI: 10.1002/aenm.201803249
  • Crossover from germanite to renierite-type structures in Cu22-xZnxFe8Ge4S32 thermoelectric sulfides - V. Pavan Kumar, L. Paradis‐Fortin, P. Lemoine, G. Le Caer, B. Malaman, P. Boullay, B. Raveau, G. Guélou and E. Guilmeau, ACS Applied Energy Materials, 2 7679 (2019). DOI:10.1021/acsaem.9b01681
  • Synthesis and thermoelectric properties of CuCoxTi2-xS4 thiospinels - C. Bourgès, V. Pavan Kumar, B. Raveau, Y. Miyazaki and E. Guilmeau, Journal of Alloys and Compounds, 781 1169 (2019). DOI: 10.1016/j.jallcom.2018.12.102
  • Designing a thermoelectric copper-rich sulfide from a natural mineral: Synthetic Germanite Cu22Fe8Ge4S32 - V. Pavan Kumar, L. Paradis‐Fortin, P. Lemoine, V. Caignert, B. Raveau, B. Malaman, G. Le Caer, S. Cordier and E. Guilmeau,”, Inorganic Chemistry, 56 (2017) 13376. DOI: 10.1021/acs.inorgchem.7b02128
  • Copper hyper-stoichiometry, the key for the optimization of thermoelectric properties in stannoidite - V. Pavan Kumar, T. Barbier, V. Caignaert, B. Raveau, R. Daou, B. Malaman, G. Le Caer, P. Lemoine and E. Guilmeau, Journal of Physical Chemistry C, 121 16454 (2017). DOI: 10.1021/acs.jpcc.7b02068
  • Crucial role of selenium for sulphur substitution in the structural transitions and thermoelectric properties of Cu5FeS4 Bornite - V. Pavan Kumar, T. Barbier, P. Lemoine, B. Raveau, V. Nassif and E. Guilmeau, Dalton Transactions, 46 (2017) 2174. DOI: 10.1039/C6DT04204J
  • A new wide band gap thermoelectric quaternary selenide Cu2MgSnSe4 - V. Pavan Kumar, Emmanuel Guilmeau, Bernard Raveau, Vincent Caignaert and U. V. Varadaraju, Journal of Applied Physics, 118, 155101 (2015). DOI: 10.1063/1.4933277
  • Synthesis and high temperature transport properties of new quaternary layered selenide NaCuMnSe2 - V. Pavan Kumar and U. V. Varadaraju, Journal of Solid State Chemistry, 212 64-68 (2014). DOI: 10.1016/j.jssc.2014.01.016

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