RAJU  CHETTY

Department Department of Physics
Designation Assistant Professor (Grade-I)
Educational Qualification Ph.D (IISc, Bangalore, 2009-2015; Postdoc (AGH-Poland, Oct 2015-Dec 2016; AIST-Japan, Sep 2017-July 2020; NIMS-Japan, Aug 2020-July 2025)
E-Mail craju.phy@nitrr.ac.in
Contact Number 9100822660
Areas of Interest
  • Experimental condensed matter physics, Materials Science,
  • Development of high perfromance thermoelectric materials and devices for energy harvesting (waste heat recovery),
  • Electrical and transport engineering, 
  • AI-assisted screening of TE materials,  
  • Contact interface engineering, 
  • Flexible & Wearable Thermoelectrics,
  • Solid state devices for cooling applications

Reliability, Stability & Scaling

  •  

Publications

List of publications in international peer-reviewed journals

  1. Jayachandran Babu*, Raju Chetty*, Takao Mori, “Geometry Optimization Strategies for Dual Enhancement of Power and Efficiency in All‐Mg3Sb1.5Bi0.5 Thermoelectric Devices”, Small, 2025, 22 (2), e71851. DOI: 10.1002/smll.202508990.*equal contribution
  2. Muhammad Fasih Aamir, Raju Chetty*, Jayachandran Babu, Takao Mori*, “Process optimization of contact interface layer for maximizing the performance of Mg 3 (Sb, Bi) 2 based thermoelectric compounds”, Journal of Materials Chemistry C, 2025, 13 (21), 10567-10575. DOI: 10.1039/D5TC00851D. *corresponding author
  3. Raju Chetty, Jayachandran Babu, Takao Mori, “Improving Thermoelectric Conversion Efficiency of Mg3(Sb, Bi)2-Based TE Materials via Interface Contact Layer Optimization”, ACS Appl. Energy Mater. 2024, 7, 12112−12118. DOI: 10.1021/acsaem.4c02794, Impact Factor: 5.5
  4. Jiankang Li, Raju Chetty*, Zihang Liu, Weihong Gao, Takao Mori*, Enhancing the Thermoelectric Performance of n-Type Mg3Sb2-Based Materials via Ag Doping, Small 2024, 2408059. DOI: 10.1002/smll.202408059, Impact Factor: 13, Quartile: 1, * corresponding author.
  5. Raju Chetty, Jayachandran Babu, Takao Mori, Best practices for evaluating the performance of thermoelectric devices, Joule, 2024, 8, 553–562. DOI:10.1016/j.joule.2024.02.009, Impact factor: 38.6, Quartile:1
  6. Sahiba Bano, Ying Peng, Takashi Aizawa, Raju Chetty, Takao Mori, Realizing enhanced thermoelectric performance in n-type Mg3(Bi, Sb)2-based film, J. Mater. Chem. C, 2023, 11, 15130-15137. DOI: 10.1039/D3TC02611F, Impact factor: 5.7, Quartile:1
  7. Longquan Wang, Naoki Sato, Ying Peng, Raju Chetty, Naoyuki Kawamoto, Duy Hieu Nguyen, Takao Mori, Realizing High Thermoelectric Performance in N‐Type Mg3 (Sb, Bi) 2‐Based Materials via Synergetic Mo Addition and Sb–Bi Ratio Refining, Adv. Energy Mater, 2023, 2301667. DOI: 10.1002/aenm.202301667, Impact factor: 27.8, Quartile:1
  8. Chengyan Liu, Zhongwei Zhang, Ying Peng, Fucong Li, Lei Miao, Eiji Nishibori, Raju Chetty, Xiaobo Bai, Ruifan Si, Jie Gao, Xiaoyang Wang, Yanqiu Zhu, Nannan Wang, Haiqiao Wei, Takao Mori, Charge transfer engineering to achieve extraordinary power generation in GeTe-based thermoelectric materials, Science Advances, 2023,  9 (17), eadh0713. DOI: 10.1126/sciadv.adh071, Impact factor: 11.7, Quartile:1
  9. Yanan Wang, Raju Chetty*, Zihang Liu, Longquan Wang, Takeo Ohsawa, Weihong Gao, Takao Mori*, A facile route to fabricating a crack-free Mg 0.99 Cu 0.01 Ag 0.97 Sb 0.99/graphene/PEDOT: PSS thermoelectric film on a flexible substrate, J. Mater. Chem. C, 2022, 10, 12610-12620. DOI: 10.1039/D2TC02176E, Impact factor: 5.7, Quartile:1,* corresponding author
  10.  Paulina Kaminska, Cédric Bourgès, Raju Chetty, Daniel Gutiérrez-Del-Río, Piotr Śpiewak, Wojciech Swieszkowski, Toshiyuki Nishimura, Takao Mori, Insight into the preponderant role of the lattice size in Sn-based colusites for promoting a high power factor, J. Mater. Chem. A, 2022, 10, 10701-10714. DOI: 10.1039/D2TA01210C, Impact factor: 10.7, Quartile:1
  11.  Raju Chetty, Priyanka Jood, Masayuki Murata, Koichiro Suekuni, Michihiro Ohta, A prototype thermoelectric module based on p-type colusite together with n-type nanostructured PbTe for power generation, Applied Physics Letters, 2022, 120 (1), 013501 . DOI: doi.org/10.1063/5.0077154, Impact factor: 3.5, Quartile:1
  12. Yuta Shimizu, Koichiro Suekuni, Hikaru Saito, Pierric Lemoine, Emmanuel Guilmeau, Bernard Raveau, Raju Chetty, Michihiro Ohta, Toshiro Takabatake, Michitaka Ohtaki, Synergistic Effect of Chemical Substitution and Insertion on the Thermoelectric Performance of Cu26V2Ge6S32 Colusite, Inorganic Chemistry, 2021, 60 (15), 11364-11373. DOI: 10.1021/acs.inorgchem.1c01321, Impact factor: 4.3, Quartile:1
  13. Katsuaki Hashikuni, Koichiro Suekuni, Hidetomo Usui, Raju Chetty, Michihiro Ohta, Toshiro Takabatake, Michitaka Ohtaki, A comparative study of thermoelectric Cu2TrTi3S8 (Tr= Co and Sc) thiospinels: Enhanced Seebeck coefficient via electronic structure modification, Journal of Alloys and Compounds, 2021, 871, 159548.DOI: 10.1016/j.jallcom.2021.159548, Impact factor: 5.8, Quartile:1
  14. Takashi Hagiwara, Koichiro Suekuni, Pierric Lemoine, Andrew R Supka, Raju Chetty, Emmanuel Guilmeau, Bernard Raveau, Marco Fornari, Michihiro Ohta, Rabih Al Rahal Al Orabi, Hikaru Saito, Katsuaki Hashikuni, Michitaka Ohtaki, Key Role of d0 and d10 Cations for the Design of Semiconducting Colusites: Large Thermoelectric ZT in Cu26Ti2Sb6S32 Compounds, Chemistry of Materials, 2021, 33(9), 3449. DOI: 10.1021/acs.chemmater.1c00872,  Impact factor: 7.2, Quartile:1
  15. Pawel Ziolkowski*, Raju Chetty*, Przemyslaw Blaschkewitz, Michihiro Ohta, Atsushi Yamamoto, Eckhard Müller, Interlaboratory Testing for High‐Temperature Power Generation Characteristics of a Ni‐Based Alloy Thermoelectric Module, Energy Technology, 2020, 8 (11), 2000557. * equal contribution. DOI: 10.1002/ente.202000557, Impact factor: 3.6, Quartile:2
  16. Priyanka Jood, Raju Chetty, Michihiro Ohta, Structural stability enables high thermoelectric performance in room temperature Ag 2 Se, J. Mater. Chem. A, 2020, 8, 13024.DOI: 10.1039/D0TA02614J, Impact factor: 10.7, Quartile:1
  17. Y. Bouyrie*, R. Chetty*, K. Suekuni, N. Saitou, P. Jood, N. Yoshizawa, T. Takabatake, M. Ohta, Enhancement of the thermoelectric power factor by tuning the carrier concentration in Cu-rich and Ge-poor colusites Cu 26+ x Nb 2 Ge 6− x S 32, J. Mater. Chem. C 2020, 8, 6442. DOI: 10.1039/D0TC00508H, Impact factor: 5.7, Quartile:1, * equal contribution.
  18. C. Candolfi, G. Guélou, C. Bourgès, A. R. Supka, R. Al Rahal Al Orabi, M. Fornari, B. Malaman, G. Le Caër, P. Lemoine, V. Hardy, J. M. Zanotti, R. Chetty, M. Ohta, K. Suekuni, E. Guilmeau, Disorder-driven glasslike thermal conductivity in colusite C u 26 V 2 S n 6 S 32 investigated by Mössbauer spectroscopy and inelastic neutron scattering, Phys. Rev. Mater. 2020, 4, 25404. DOI: 10.1103/PhysRevMaterials.4.025404, Impact factor: 3.1, Quartile:1
  19. R. Chetty, K. Nagase, M. Aihara, P. Jood, H. Takazawa, M. Ohta, A. Yamamoto, Mechanically durable thermoelectric power generation module made of Ni-based alloy as a reference for reliable testing, Appl. Energy 2020, 260, 114443. DOI: 10.1016/j.apenergy.2019.114443, Impact factor: 10.1, Quartile:1
  20. W. Silpawilawan, S. at Tanuslip, R. Chetty, M. Ohta, Y. Ohishi, H. Muta, K. Kurosaki, Realizing Excellent n‐and p‐Type Niobium‐Based Half‐Heusler Compounds Based on Thermoelectric Properties and High‐Temperature Stability, Adv. Electron. Mater. 2020, 2000083, 1. DOI: 10.1002/aelm.202000083, Impact factor: 5.3, Quartile:1
  21. K. Suekuni, Y. Shimizu, E. Nishibori, H. Kasai, H. Saito, D. Yoshimoto, K. Hashikuni, Y. Bouyrie, R. Chetty, M. Ohta, E. Guilmeau, T. Takabatake, K. Watanabe, M. Ohtaki, Atomic-scale phonon scatterers in thermoelectric colusites with a tetrahedral framework structure, J. Mater. Chem. A 2019, 7, 228. DOI: 10.1039/C8TA08248K, ,Impact factor: 10.7, Quartile:1
  22. W. He, D. Wang, H. Wu, Y. Xiao, Y. Zhang, D. He, Y. Feng, Y.-J. Hao, J.-F. Dong, R. Chetty, L. Hao, D. Chen, J. Qin, Q. Yang, X. Li, J.-M. Song, Y. Zhu, W. Xu, C. Niu, X. Li, G. Wang, C. Liu, M. Ohta, S. J. Pennycook, J. He, J.-F. Li, L.-D. Zhao, High thermoelectric performance in low-cost SnS0.91Se0.09 crystals, Science 2019, 365, 1418. DOI: 10.1126/science.aax5123, Impact factor: 44.7, Quartile:1
  23. S. Mukherjee, R. Chetty, P. V. P. Madduri, A. K. Nayak, K. Wojciechowski, T. Ghosh, K. Chattopadhyay, S. Suwas, R. C. Mallik, Investigation on the structure and thermoelectric properties of Cu x Te binary compounds, Dalt. Trans. 2019, 48, 1040. DOI: 10.1039/C8DT04351E, Impact factor: 3.5, Quartile:1
  24. R. Chetty, Y. Kikuchi, Y. Bouyrie, P. Jood, A. Yamamoto, K. Suekuni, M. Ohta, Power generation from the Cu 26 Nb 2 Ge 6 S 32-based single thermoelectric element with Au diffusion barrier, J. Mater. Chem. C 2019, 7, 5184. DOI: 10.1039/C9TC00868C, Impact factor: 5.7, Quartile:1
  25. R. Chetty, J. Tobola, P. Klimczyk, L. Jaworska, K. T. Wojciechowski, Structural, electronic and thermal properties of TexCo4Sb11. 75Te0. 25, J. Alloys Compd. 2019, 809, 151477. DOI: 10.1016/j.jallcom.2019.07.189, Impact factor: 5.8, Quartile:1
  26. K. Hashikuni, K. Suekuni, H. Usui, R. Chetty, M. Ohta, K. Kuroki, T. Takabatake, K. Watanabe, M. Ohtaki, Thermoelectric Properties and Electronic Structures of CuTi2S4 Thiospinel and Its Derivatives: Structural Design for Spinel-Related Thermoelectric Materials, Inorg. Chem. 2019, 58, 1425. DOI: 10.1021/acs.inorgchem.8b02955, Impact factor: 4.3, Quartile:1
  27. S. Tippireddy, R. Chetty, M. H. Naik, M. Jain, K. Chattopadhyay, R. C. Mallik, Electronic and thermoelectric properties of transition metal substituted tetrahedrites, J. Phys. Chem. C 2018, 122, 8735. DOI: 10.1021/acs.jpcc.7b12214, Impact factor: 3.3, Quartile:1
  28. S. Tippireddy, R. Chetty, K. K. Raut, M. H. Naik, P. K. Mukharjee, M. Jain, R. Nath, K. Wojciechowski, R. C. Mallik, Electronic and thermoelectric properties of Zn and Se double substituted tetrahedrite, Phys. Chem. Chem. Phys. 2018, 20, 28667. DOI: 10.1039/C8CP05479G, Impact factor: 2.9, Quartile:2
  29. S. Mukherjee, O. E. Femi, R. Chetty, K. Chattopadhyay, S. Suwas, R. C. Mallik, Microstructure and thermoelectric properties of Cu2Te-Sb2Te3 pseudo-binary system, Appl. Surf. Sci. 2018, 449, 805. DOI: 10.1016/j.apsusc.2017.11.198, Impact factor: 6.3, Quartile:1
  30.  K. J. Tiwari, R. Chetty, R. C. Mallik, P. Malar, Solid state synthesis and e-beam evaporation growth of Cu2ZnSnSe4 for solar energy absorber applications, Sol. Energy 2017, 153, 173. DOI: 10.1016/j.solener.2017.05.042, Impact factor: 6.0, Quartile:1
  31.  D. S. P. Kumar, R. Chetty, O. E. Femi, K. Chattopadhyay, P. Malar, R. C. Mallik, Thermoelectric properties of Bi doped tetrahedrite, J. Electron. Mater. 2017, 46, 2616. DOI: 10.1007/s11664-016-4826-5, Impact factor: 2.2, Quartile:2
  32. S. Das, R. Chetty, K. Wojciechowski, S. Suwas, R. C. Mallik, Thermoelectric properties of Sn doped BiCuSeO, Appl. Surf. Sci. 2017, 418. DOI: 10.1016/j.apsusc.2016.10.209, Impact factor: 6.3, Quartile:1
  33. D. S. Prem Kumar, R. Chetty, P. Rogl, G. Rogl, E. Bauer, P. Malar, R. C. Mallik, Thermoelectric properties of Cd doped tetrahedrite: Cu12− xCdxSb4S13, Intermetallics 2016, 78, 21. DOI: 10.1016/j.intermet.2016.08.003, Impact factor: 4.3, Quartile:1
  34. A. Bali, R. Chetty, A. Sharma, G. Rogl, P. Heinrich, S. Suwas, D. K. Misra, P. Rogl, E. Bauer, R. C. Mallik, Thermoelectric properties of In and I doped PbTe, J. Appl. Phys. 2016, 120, 175101. DOI: 10.1063/1.4965865, Impact factor: 2.7, Quartile:2
  35.   R. Chetty, A. Bali, R. C. Mallik, Thermoelectric properties of indium doped Cu2CdSnSe4, Intermetallics 2016, 72, 17. DOI: 10.1016/j.intermet.2016.01.004, Impact factor: 4.3, Quartile:1
  36. R. Chetty, A. Bali, O. E. Femi, K. Chattopadhyay, R. C. Mallik, Thermoelectric Properties of In-Doped Cu2ZnGeSe4, J. Electron. Mater. 2016, 45, 1625. DOI: 10.1007/s11664-015-4131-8, Impact factor: 2.2, Quartile:2
  37. A. Bali, R. Chetty, R. C. Mallik, Thermoelectric properties of PbTe with indium and bismuth secondary phase, Indian J. Phys., 2016, 90, 665. DOI: 10.1007/s12648-015-0793-6, Impact factor: 1.6, Quartile:3
  38.  G. Rogl, A. Grytsiv, K. Yubuta, S. Puchegger, E. Bauer, C. Raju, R. C. Mallik, P. Rogl, In-doped multifilled n-type skutterudites with ZT= 1.8, Acta Mater. 2015, 95, 201. DOI: 10.1016/j.actamat.2015.05.024, Impact factor: 8.3, Quartile:1
  39. R. Chetty, J. Dadda, J. de Boor, E. Müller, R. C. Mallik, The effect of Cu addition on the thermoelectric properties of Cu2CdGeSe4, Intermetallics 2015, 57, 156. DOI: 10.1016/j.intermet.2014.10.015, Impact factor: 4.3, Quartile:1
  40. R. Chetty, P. K. D. S., G. Rogl, P. Rogl, E. Bauer, H. Michor, S. Suwas, S. Puchegger, G. Giesterg, R. C. Mallik, Thermoelectric properties of a Mn substituted synthetic tetrahedrite, Phys. Chem. Chem. Phys. 2015, 17, 1716. DOI: 10.1039/C4CP04039B, Impact factor: 2.9, Quartile:2\
  41.  R. Chetty, A. Bali, M. H. Naik, G. Rogl, P. Rogl, M. Jain, S. Suwas, R. C. Mallik, Thermoelectric properties of Co substituted synthetic tetrahedrite, Acta Mater. 2015, 100, 266. DOI: 10.1016/j.actamat.2015.08.040, Impact factor: 8.3, Quartile:1
  42. A. Bali, R. Chetty, R. Chandra Mallik, Thermoelectric properties of Pb0. 75− xMnxSn0. 25Te alloys with variable manganese content, Mater. Sci. Semicond. Process. 2015, 34, 326. DOI: 10.1016/j.mssp.2015.02.053, Impact factor:4.2, Quartile:2
  43.  R. Chetty, D. S. P. Kumar, M. Falmbigl, P. Rogl, S.-W. You, I.-H. Kim, R. C. Mallik, Thermoelectric properties of Indium doped Cu2GeSe3, Intermetallics 2014, 54, 1. DOI: 10.1016/j.intermet.2014.05.006, Impact factor: 4.3. Quartile:1
  44.  C. Raju, M. Falmbigl, P. Rogl, P. Heinrich, E. Royanian, E. Bauer, R. C. Mallik, Thermoelectric properties of Zn doped Cu2SnSe3, Mater. Chem. Phys. 2014, 147, 1022. DOI: 10.1016/j.matchemphys.2014.06.054, Impact factor: 4.3, Quartile:2
  45. R. Chetty, M. Falmbigl, P. Rogl, P. Heinrich, E. Royanian, E. Bauer, S. Suwas, R. C. Mallik, The effect of multisubstitution on the thermoelectric properties of chalcogenide‐based Cu2.1Zn0.9Sn1−xInxSe4 (0 ≤ x ≤ 0.1), Phys. Status Solidi Appl. Mater. Sci. 2013, 210, 2471. DOI: 10.1002/pssa.201329264, Impact factor: 1.9, Quartile:2
  46.   C. Raju, M. Falmbigl, P. Rogl, X. Yan, E. Bauer, J. Horky, M. Zehetbauer, R. Chandra Mallik, Thermoelectric properties of chalcogenide based Cu2+ xZnSn1− xSe4, AIP Adv. 2013, 3, 032106. DOI: 10.1063/1.4794733, Impact factor: 1.4, Quartile:3

Papers published in National /International Conference Proceedings:

  1. S. Bhattacharya, C. Raju, R.C. Mallik, Electron Mean Free Path in PbTe Quantum Wires, AIP Conference Proceedings, AIP, 2011, pp. 949-950. DOI: 10.1063/1.3606172
  2. R. Chetty, R.C. Mallik, High temperature XRD of Cu2.1Zn0.9SnSe4, AIP Conference Proceedings, AIP, 2014, pp. 1711-1713. DOI: 10.1063/1.4873086
  3. A. Bali, R. Chetty, R.C. Mallik, Elastic properties of sulphur and selenium doped ternary PbTe alloys by first principles, AIP Conference Proceedings, AIP, 2014, pp. 1118-1120. DOI: 10.1063/1.4872873
  4. D. Premkumar, P. Malar, R. Chetty, R.C. Mallik, High temperature XRD of Cu2GeSe3, AIP Conference Proceedings, 2015, 1665, 120020. DOI: 10.1063/1.4918127
  5. R. Chetty, K. Wojciechowski, Structural and thermal properties of tetrahedrites prepared by FAST method, Mechanik 89(5-6) (2016) 510--511. DOI: 10.17814/mechanik.2016.5-6.61
  6. K. Januszko, R. Chetty, T. Mashimo, K. Wojciechowski, Characterization of the starting materials for functionally graded thermoelectric materials for pseudobinary system of Bi2Te3-Sb2Te3, Mechanik 89(5-6) (2016) 522--523. DOI: 10.17814/mechanik.2016.5-6.67

Review Article

  1. R. Chetty, A. Bali, R. C. Mallik, Tetrahedrites as thermoelectric materials: an overview, J. Mater. Chem. C 2015, 3, 12364. DOI: 10.1039/C5TC02537K, Impact factor: 6.4 
  2. Sahiba Bano*, Raju Chetty*, Jayachandran Babu, Takao Mori, Mg3(Sb,Bi)2-based materials and devices rivaling bismuth telluride for thermoelectric power generation and cooling” Device, 2024, 2 (7), 100408, DOI: 10.1016/j.device.2024.100408. * Equal contribution

Patent:

  1. Raju Chetty and Takao Mori, “Manufacturing method for thermoelectric conversion elements and their thermoelectric conversion elements” Patent filed on 2023-06-23, Reference number: 20230040

Book Chapters:

  1. Ashoka Bali, Raju Chetty, and Ramesh Chandra Mallik, chapter titled “Thin Film Thermoelectric Materials for Sensor Applications: An Overview” edited by K.M. Suresh Babu (Springer Publication, Switzerland) 2015.DOI: 10.1007/978-3-319-14774-1_7
  2. Priyanka Jood, Raju Chetty, and Michihiro Ohta, chapter titled “All-scale phonon scattering” edited by Ken Kurosaki, Yoshiki Takagiwa and Xun Shi (De Gruyter Publisher, Germany) 2020. DOI: 10.1515/9783110596526
  3. Michihiro Ohta, Priyanka Jood, Raju Chetty, Mercouri G Kanatzidis, chapter titled “Materials development and module fabrication in highly efficient lead tellurides” edited by Ryoji Funahashi (Woodhead Publishing), 2021. DOI: 10.1016/B978-0-12-818535-3.00020-7


Other Info.

Teaching:

UG level: 

  1. PH10I005PH: Theory of Relativity; Wave  Optics; Introduction to Quantum Mechanics; Superconductivity, Dielectrics and Magnetic materials

PG level: 

  1. PH911101PH: Mathematical Methods in Physics

Google Scholar

https://scholar.google.com/citations view_op=list_works&hl=en&authuser=1&hl=en&user=KIasp1UAAAAJ&sortby=pubdate&authuser=1

ORCID:

https://orcid.org/0000-0003-1072-8241

Scoupus

http://www.scopus.com/inward/authorDetails.url?authorID=55828913500&partnerID=MN8TOARS

Researcher ID

http://www.researcherid.com/rid/G-4136-2016