Los Alamos National Laboratory
Nanotechnology and Advanced Spectroscopy Team

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Istvan Robel

Istvan Robel

Los Alamos National Laboratory
MS J567, C-PCS
Los Alamos, NM 87545
Phone: 505-665-1462
Email: robel@lanl.gov

Google Scholar Profile

Professional Career

  • 2014-present, Scientist, Los Alamos National Laboratory
  • 2010-2014, Research Technologist, Los Alamos National Laboratory
  • 2007-2010, Postdoctoral Research Associate, Los Alamos National Laboratory
  • 2006-2007, Postdoctoral Appointee, Argonne National Laboratory


  • 2006: Ph.D. in Physics, University of Notre Dame
  • 2004: M.S. in Physics, University of Notre Dame
  • 2000: B.S. in Physics, Babes-Bolyai University, Romania

Current Research:

My current research focuses on the study of the optical, electronic, and transport properties of semiconductor nanocrystals.


  • Distinguished Performance Award (ACERT Team), LANL, 2016
  • Los Alamos Awards Program, 2008, 2013, 2014, 2019
  • ISI Fast Breaking Paper in Chemistry, 2007
  • Kaneb Teaching Award, Notre Dame, 2004

Selected Publications

  • R. Singh, W. Liu, J. Lim, I. Robel, V. I. Klimov, Hot-electron dynamics in quantum dots manipulated by spin-exchange Auger interactions, Nature Nanotechnology 14, 1035-1041, 2019
  • N. A. Moody, K. L. Jensen, A. Shabaev, S. G. Lambrakos, J. Smedley, D. Finkenstadt, J. M. Pietryga, P. M. Anisimov, V. Pavlenko, E. R. Batista, J. W. Lewellen, F. Liu, G. Gupta, A. Mohite, H. Yamaguchi, M. A. Hoffbauer, and I. Robel, Perspectives on Designer Photocathodes for X-ray Free-Electron Lasers: Influencing Emission Properties with Heterostructures and Nanoengineered Electronic States, Phys. Rev. Applied 10, 047002, 2018
  • N. S. Makarov, J. Lim, Q. Lin, J. W. Lewellen, N. A. Moody, I. Robel, J. M. Pietryga, Quantum Dot Thin-Films as Rugged, High-Performance Photocathodes, Nano Letters 17, 2319-2327, 2017
  • W. Liu, Q. Lin, H. Li, K. Wu, I. Robel, J. M. Pietryga, V. I. Klimov, Mn2+-Doped Lead Halide Perovskite Nanocrystals with Dual-Color Emission Controlled by Halide Content, J. Am. Chem. Soc., 138, 14954-14961, 2016
  • N. S. Makarov, Q. Lin, J. M. Pietryga, I. Robel, V. I. Klimov, Auger-Up-Conversion of Low-Intensity Infrared Light in Engineered Quantum Dots, ACS Nano 10, 10829-10841, 2016
  • N. S. Makarov, S. Guo, O. Isaienko, W. Liu, I. Robel, V. I. Klimov, Spectral and Dynamical Properties of Single Excitons, Biexcitons, and Trions in Cesium–Lead-Halide Perovskite Quantum Dots, Nano Lett. 16, 2349-2362 (2016)
  • O. Isaienko and I. Robel, Phonon-assisted nonlinear optical processes in ultrashort-pulse pumped optical parametric amplifiers, Sci. Rep. 6, 23031 (2016)
  • I. Robel, A. Shabaev, D. C. Lee, R. D. Schaller, J. M. Pietryga, S. A. Crooker, Al. L. Efros, V. I. Klimov, Temperature and Magnetic-Field Dependence of Radiative Decay in Colloidal Germanium Quantum Dots, Nano Lett. 15, 2685-2692 (2015)
  • C. M. Cirloganu, L. A. Padilha, Q. Lin, N. S. Makarov, K. A. Velizhanin, H. Luo, I. Robel, J. M. Pietryga, V. I. Klimov, Enhanced carrier multiplication in engineered quasi-type-II quantum dots, Nature Communications 5, 4148 (2014)
  • W. K. Bae, Y.-S. Park, J. Lim, D. Lee, L. A. Padilha, H. McDaniel, I. Robel, C. Lee, J. M. Pietryga, V. I. Klimov, Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes,Nature Communications 4, 2661 (2013)
  • W.-k. Koh, A. Y. Koposov, J. T. Stewart, B. N. Pal, I. Robel, J. M. Pietryga, V. I. Klimov, Heavily doped n-type PbSe and PbS nanocrystals using ground-state charge transfer from cobaltocene, Scientific Reports, 3, 2004 (2013)
  • B. N. Pal, I. Robel, A. Mohite, R. Laocharoensuk D. Werder, and V. I. Klimov, “High-Sensitivity p-n Junction Photodiodes Based on PbS Nanocrystal Quantum Dots” Adv. Funct. Mater., 22, 8, 1741–1748 (2012)
  • L. A. Padilha, I. Robel, D.C. Lee, P. Nagpal, J. M. Pietryga, and V. I. Klimov, Spectral Dependence of Nanocrystal Photoionization Probability: The Role of Hot-Carrier Transfer, ACS Nano (2011)
  • D.C. Lee, I. Robel, J.M. Pietryga, V.I. Klimov, Infrared-Active Heterostructured Nanocrystals with Ultralong Carrier Lifetimes. J. Am. Chem. Soc.132, 9960 (2010).
  • J. A. McGuire, M. Sykora, I. Robel, L. A. Padilha, J. Joo, J. M. Pietryga, V. I. Klimov, Spectroscopic signatures of photocharging due to hot-carrier transfer in solutions of semiconductor nanocrystlas under low-intensity ultraviolet excitation, ACS Nano 4, 6087 (2010).
  • I. Robel, R. Gresback, U. Kortshagen, R. D. Schaller, V. I. Klimov, Universal size-dependent trend in Auger recombination in direct-gap and indirect-gap semiconductor nanocrystals, Phys. Rev. Lett. 102, 177404 (2009)
  • I. Robel, M. Kuno, and P. V. Kamat, Size-dependent electron injection from excited CdSe quantum dots into TiO2 nanoparticles, J. Am. Chem. Soc. 129, 4136 (2007)
  • I. Robel, V. Subramanian, M. Kuno, P. V. Kamat, Quantum dot solar cells. Harvesting light energy with CdSe nanocrystals molecularly linked to mesoscopic TiO2 films,  J. Am. Chem. Soc. 128, 2385 (2006)
  • I. Robel, B. A. Bunker, P. V. Kamat, M. Kuno, Exciton recombination dynamics in CdSe nanowires: Bimolecular to three-carrier Auger kinetics, Nano Lett. 6, 1344 (2006)
  • I. Robel, B. A. Bunker, P. V. Kamat, Single-walled carbon nanotube-CdS nanocomposites as light-harvesting assemblies: Photoinduced charge-transfer interactions, Adv. Mater. 17, 2458 (2005)

March 2020

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