Dr Hemant Kumar Mulmudi

Research Fellow
Research Area:
+ 61 2 6125 2369

Hemant obtained Ph.D. from the Nanyang Technological University, Singapore in 2014. His interests span from material synthesis via solution processed method to its application in energy harvesting devices such as photovoltaics and water splitting. At the Australian National University, he has been working on developing halide based perovskite materials for single junction and tandem solar cells and worked on (cathodo) luminescence spectroscopy as a characterization tool to understand the optoelectronic properties of these materials. He also developed cross-sectional nanoindentation technique to evaluate the fracture toughness of single and multi-junction photovoltaic devices.

He also worked on developing earth abundant metal oxide variants for sensing, catalysis and other optoelectronic applications. Using simulation tools and modeling, an understanding between the interaction of the materials systems in the bulk and at the interfaces are explored.

He participated in outreach activities which comprised of demonstrating fabrication of blue berry powered solar cells to young and inquisitive children at the Garran primary school, Canberra. He holds a M.S in nanotechnology (2009) from the Ulm University, Germany and a bachelor's degree in metallurgical and materials engineering (2007) from the Indian Institute of Technology-Roorkee, India.

Research Exchange\visit:

1. Visit to École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, Host: Prof. Michael Graetzel.
Role: Demonstrating additive enabled solution processed inorganic tin based halide perovskite for photovoltaic application. (April-May, 2014).
2. Visit to the University of Tokyo, Japan, Host: Prof. Uchida Satoshi.
Role: Worked on Gelation of liquid electrolyte for application in quasi-solid state dye sensitized solar cells. (August-September, 2011).

  • Perovskite solar cells: Materials development and Characterization.
  • Silicon/perovskite tandem solar cells.
  • Developing Lead-free halide and oxide perovskites for optoelectronic applications.
  • Using cathodoluminescence for charactersing halide based perovskite materials.
  • Dye-sensitized solar cells- Fabrication of both liquid and solid state solar cells and developing electrodes.
  • Photocatalysis for hydrogen and oxygen evolution.
  • Developing transparent metal oxides and earth abundant metal oxides for sensing, water catalysis and other related applications. 










Perovskite solar cells: Technology and Practices, Apple Academic Press; (2019)



List of journal publications


  1. Thind, A.S.; Kavadiya, S.; Wheelus, R.; Sung, B.C.; Lin, Y.L.; Clayton, K.; Mulmudi, H.K.; Unocic, K.A.; Borisevich, A.Y.; Pilania, G.; Biswas, P.; Mishra, R; KBaTeBiO6: A lead-  free, inorganic double-perovskite semiconductor for photovoltaic applications, Chem. Mater.,2019, 31, 13, 4769-4778.

  2. Chen, H; Mulmudi, H.K.; Tricoli, A.;  Flame spray pyrolysis for the one-step fabrication of transition meal oxide films: Recent progress in electrochemical and photoelectrochemical     water splitting, https://doi.org/10.1016/j.cclet.2019.05.016.

  3. Gosh, B.; Wu, B.; Mulmudi, H.K.; Guet, C.; Weber, K.; Sum, T.C.; Mhaisalkar, S.G.; Mathews, N.; Limitations of Cs3Bi2Ias lead-free photovoltaic absorber materials.  ACS Appl. Mater. InterfacesDOI: 10.1021/acsami.7b1473, 2018.

  4.  Ma,Q.; Huang, S.; Chen, S.; Zhang, .; Lau, C.J.; Lockrey, M.;  Mulmudi, H.K.; Shan, Y.; Yao, J.; Zheng, J.; Deng, X.;  Catchpole, K.;  Green, M.; Ho-Baillie, A; The Effect of Stoichiometry on the Stability of Inorganic Cesium Lead Mixed-Halide Perovskites Solar Cells,  J. Phys. Chem. C, 2017, 121 (36), pp 19642–19649.

  5. Harikesh, P.C.; Mulmudi, H. K.;  Ghosh, B.;  Goh, T.K.;  Teng, Y.T;  Thirumal, K.;  Lockrey, M.; Weber, K;  Koh, T.K;  Li, S;  Mhaisalkar, S;  Mathews, N., Rb as an alternative cation for templating inorganic lead-free perovskites for solution processed photovoltaics. Chem. Mater., 2016, 28 (20), pp 7496–7504.

  6. Duong, T.; Mulmudi, H.K.; Shen, H.; Wu, Y.; Barugkin, C.; Mayon, Y.O.; Nguyen, H.T.;  Macdonald, D.; Peng, J.; Lockrey, M.;  Li, W.; Cheng, Y.B.; White, T.P.;  Weber, K.; Catchpole, K., Structural engineering using rubidium iodide as a dopant under excess lead iodide conditions for high efficiency and stable perovskites. Nano Energy 30, 330-340.

  7. Peng, J.; Duong, T.;  Zhou, X.; Shen, H.;  Wu, Y.;  Mulmudi, H.K.;  Wan, Y.;  Zhong, D.;  Li, J.; Tsuzuki, T.;  Weber, K.;  Catchpole, K.; White, T., Efficient Indium‐Doped TiOx Electron Transport Layers for High‐Performance Perovskite Solar Cells and Perovskite‐Silicon Tandems. Advanced Energy Materials DOI: 10.1002/aenm.201601768.

  8. Xing, G.; Mulmudi, H.K.;  Chong, W.K.; Liu, X.;  Cai, Y.;  Ding, H.;  Asta, M.;  Grätzel, M.;  Mhaisalkar, S.; Mathews, N.;  Sum, T.C., Solution‐Processed Tin‐Based Perovskite for Near‐Infrared Lasing. Advanced Materials 28 (37), 8191-8196.

  9. Gurudayal, Sabba, D.; Mulmudi, H. K.; Wong, L. H.; Barber, J.; Grätzel, M.; Mathews, N., Perovskite-Hematite Tandem Cells for Efficient Overall Solar Driven Water Splitting. Nano letters 15 (6), 3833-3839.

  10. Sabba, D.; Mulmudi, H. K.; Prabhakar, R. R.; Krishnamoorthy, T.; Baikie, T.; Boix, P. P.; Mhaisalkar, S. G.; Mathews, N., Impact of Anionic Br- Substitution on Open Circuit Voltage in Lead Free Perovskite (CsSnI3-XBrx) Solar Cells. The Journal of Physical Chemistry C 119 (4), 1763-1767.

  11. Mulmudi, H. K.; Dharani, S.; Leong, W. L.; Boix, P. P.; Prabhakar, R. R.; Baikie, T.; Shi, C.; Ding, H.; Ramesh, R.; Asta, M., Lead‐Free Halide Perovskite Solar Cells with High Photocurrents Realized through Vacancy Modulation. Advanced Materials 2014, 26, 7122-7127.

  12. Prabhakar, R. R.; Huu Loc, N.; Mulmudi, H.K.;  Boix, P. P.; Juan, S.; John, R. A.; Batabyal, S. K.; Wong, L. H., Facile Water-Based Spray Pyrolysis of Earth-Abundant Cu2FeSnS4 Thin Films as an Efficient Counter Electrode in Dye-Sensitized Solar Cells. ACS applied materials & interfaces 2014, 6, 17661-17667.

  13. Shukla, S.; Loc, N. H.; Boix, P. P.; Koh, T. M.; Prabhakar, R. R.; Mulmudi, H. K.; Zhang, J.; Chen, S.; Ng, C. F.; Huan, C. H. A., Iron Pyrite Thin Film Counter Electrodes for Dye-Sensitized Solar Cells: High Efficiency for Iodine and Cobalt Redox Electrolyte Cells. ACS Nano 2014, 8, 10597-10605.

  14. Chiam, S. Y.; Mulmudi, H.K.;  Bassi, P. S.; Seng, H. L.; Barber, J.; Wong, L. H., Improving the Efficiency of Hematite Nanorods for Photoelectrochemical Water Splitting by Doping with Manganese. ACS applied materials & interfaces 2014, 6, 5852-5859.

  15. Sabba, D.; Mulmudi, H. K.; Yantara, N.; Trang, P. T. T.; Park, N. G.; Grätzel, M.; Mhaisalkar, S.; Mathews, N.; Boix, P. P., High Efficiency Electrospun TiO2 Nanofiber Based Hybrid Organic–Inorganic Perovskite Solar Cell. Nanoscale 2014, 6, 1675-1679.

  16. Sabba, D.; Mathews, N.; Chua, J.; Pramana, S. S.; Mulmudi, H. K.; Wang, Q.; Mhaisalkar, S. G., High-Surface-Area, Interconnected, Nanofibrillar TiO2 Structures as Photoanodes in Dye-Sensitized Solar Cells. Scripta Materialia 2013, 68, 487-490.

  17. Mulmudi, H. K.; Yantara, N.; Dharani, S.; Grätzel, M.; Mhaisalkar, S.; Boix, P. P.; Mathews, N., Flexible, Low-Temperature, Solution Processed ZnO-Based Perovskite Solid State Solar Cells. Chemical Communications 2013, 49, 11089-11091.

  18. Mulmudi, H. K.; Mathews, N.; Boix, P. P.; Nonomura, K.; Powar, S.; Ming, L. Y.; Graetzel, M.; Mhaisalkar, S. G., Decoupling Light Absorption and Charge Transport Properties in near IR-Sensitized Fe2O3 Regenerative Cells. Energy & Environmental Science 2013, 6, 3280-3285.

  19. Yantara, N.; Mathews, N.; Jinesh, K.; Mulmudi, H. K.; Mhaisalkar, S. G., Modulating the Optical and Electrical Properties of All Metal Oxide Solar Cells through Nanostructuring and Ultrathin Interfacial Layers. Electrochimica Acta 2012, 85, 486-491.

  20. Boxi, X.; Mulmudi, H. K.; Prabhakar, R. R.; Mathews, N.; Mhaisalkar, S. G., The Effect of Annealing Temperature on the Optical Properties of In2S3 Thin Film. Nanoscience and Nanotechnology Letters 2012, 4, 747-749.

  21. Xi, L.; Tran, P. D.; Chiam, S. Y.; Bassi, P. S.; Mak, W. F.; Mulmudi, H. K.; Batabyal, S. K.; Barber, J.; Loo, J. S. C.; Wong, L. H., CO3O4-Decorated Hematite Nanorods as an Effective Photoanode for Solar Water Oxidation. The Journal of Physical Chemistry C 2012, 116, 13884-13889.

  22. Mulmudi, H. K.; Zhang, L.; Batabyal, S.; Ming Lam, Y.; Mhaisalkar, S., Metal/Metal Sulfide Functionalized Single-Walled Carbon Nanotubes: FTO-Free Counter Electrodes for Dye Sensitized Solar Cells. Physical Chemistry Chemical Physics 2012, 14, 9906-9911.

  23. Nguyen, L. H.; Mulmudi, H. K.; Sabba, D.; Kulkarni, S. A.; Batabyal, S. K.; Nonomura, K.; Grätzel, M.; Mhaisalkar, S. G., A Selective Co-Sensitization Approach to Increase Photon Conversion Efficiency and Electron Lifetime in Dye-Sensitized Solar Cells. Physical Chemistry Chemical Physics 2012, 14, 16182-16186.

  24. Mulmudi, H. K.; Batabyal, S. K.; Rao, M.; Prabhakar, R. R.; Mathews, N.; Lam, Y. M.; Mhaisalkar, S. G., Solution Processed Transition Metal Sulfides: Application as Counter Electrodes in Dye Sensitized Solar Cells (DSCs). Physical Chemistry Chemical Physics 2011, 13, 19307-19309.

  25. Karthik, K.; Mulmudi, H. K.; Jinesh, K.; Mathews, N.; Sow, C.; Huang, Y.; Mhaisalkar, S., Charge Transport in Hierarchical α-Fe2O3 Nanostructures. Applied Physics Letters 2011, 99, 132105.

  26. Mulmudi, H. K.; Mathews, N.; Dou, X.; Xi, L.; Pramana, S.; Lam, Y.; Mhaisalkar, S., Controlled Growth of Hematite (α-Fe2O3) Nanorod Array on Fluorine Doped Tin Oxide: Synthesis and Photoelectrochemical Properties. Electrochemistry Communications 2011, 13, 951-954.





2010-2014: PhD in the School of Materials Science and Engineering at Nanyang Technological University, Singapore.

Topic: Investigating hematite nanostructures for photovoltaic applications.

2007-2009: Masters in Advanced Materials (Nanotechnology), University Ulm, Ulm, Germany.

Master thesis: Application of cross-sectional nanoindentation to investigate mechanical stability of complex back-end-of-line (BEOL) stack at Cu\low-K interface. Performed at the Centre for Complex Analysis (CCA), GLOBALFOUNDRIES, Dresden, Germany.

2003-2007: Bachelors in Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, India.

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