Christopher Petoukhoff

Research Interests

Christopher's main research focus is directed towards understanding the charge carrier dynamics in organic conjugated polymer thin-films, interfaces, and devices. In particular, Christopher has investigated ultrafast charge transfer in conjugated polymer/transition metal dichalcogenide organic/2D heterostructures, with and without plasmonic metasurfaces. Christopher has combined an array of steady-state and ultrafast optical spectroscopies to understand the influence of plasmonic and 2D materials on the exciton and free charge dynamics in conjugated polymers.

In addition, Christopher has supported investigations in trapping dynamics in metal halide perovskites at nanometer-spatial and femtosecond-temporal length scales using time-resolved photoemission electron microscopy (TR-PEEM).

Selected Publications

S. Kosar, A. J. Winchester, T. A. S. Doherty, S. Macpherson, C. E. Petoukhoff, K. Frohna, M. Anaya, N. S. Chan, J. Madeo, M. K. L. Man, S. D. Stranks*, K. M. Dani*, "Unraveling the Varied Nature and Roles of Defects in Hybrid Halide Perovskites with Time-Resolved Photoemission Electron Microscopy," Energy Environ. Sci., 14, 6320-6328 (2021). https://doi.org/10.1039/D1EE02055B
C. E. Petoukhoff*, K. M. Dani, D. M. O'Carroll*, "Strong Plasmon-Exciton Coupling in Ag Nanoparticle-Conjugated Polymer Core-Shell Hybrid Nanostructures," Polymers, 12, 2141 (2020). https://doi.org/10.3390/polym12092141
T. A. S. Doherty, A. J. Winchester, S. Macpherson, D. N. Johnstone, V. Pareek, E. M. Tennyson, S. Kosar, F. U. Kosasih, M. Anaya, M. Abdi-Jalebi, Z. Andaji-Garmaroudi, E. L. Wong, J. Madéo, Y.-H. Chiang, J.-S. Park, Y.-K. Jung, C. E. Petoukhoff, G. Divitini, M. K. L. Man, C. Ducati, A. Walsh, P. A. Midgley, K. M. Dani*, S. D. Stranks*, "Performance-Limiting Nanoscale Trap Clusters at Grain Junctions in Halide Perovskites," Nature, 580, 360-366 (2020). https://doi.org/10.1038/s41586-020-2184-1
C. E. Petoukhoff*, S. Kosar, M. Goto, I. Bozkurt, M. Chhowalla, K. M. Dani, "Charge Transfer Dynamics in Conjugated Polymer/MoS2 Organic/2D Heterojunctions," Mol. Syst. Des. Eng., 4, 929-938 (2019). https://doi.org/10.1039/C9ME00019D
Y. Wang, R. Fullon, M. Acerce, C. E. Petoukhoff, J. Yang, C. Chen, S. Du, S. K. Lai, S. P. Lau, D. Voiry, D. M. O'Carroll, G. Gupta, A. D. Mohite, S. Zhang, H. Zhou*, M. Chhowalla*, "Solution-Processed MoS2/Organolead Trihalide Perovskite Photodetectors," Adv. Mater., 29, 1603995 (2017). https://doi.org/10.1002/adma.201603995
C. E. Petoukhoff*, M. B. M. Krishna, D. Voiry, I. Bozkurt, S. Deckoff-Jones, M. Chhowalla, D. M. O’Carroll, K. M. Dani, "Ultrafast Charge Transfer and Enhanced Absorption in MoS2–Organic van der Waals Heterojunctions Using Plasmonic Metasurfaces,"ACS Nano, 10, 9899-9908 (2016). https://doi.org/10.1021/acsnano.6b03414
C. E. Petoukhoff*, C. Antonick, M. B. M. Krishna, K. M. Dani, D. M. O'Carroll, "Oxidation of Planar and Plasmonic Ag Surfaces by Exposure to O2/Ar Plasma for Organic Optoelectronic Applications," MRS Advances, 1, 943-948 (2016). https://doi.org/10.1557/adv.2016.83
C. E. Petoukhoff and D. M. O’Carroll*, "Absorption-Induced Scattering and Surface Plasmon Out-Coupling from Absorber-Coated Plasmonic Metasurfaces," Nat. Commun., 6, 7899 (2015). https://doi.org/10.1038/ncomms8899
C. E. Petoukhoff*, Z. Shen, M. Jain, A. Chang, D. M O’Carroll*, "Plasmonic Electrodes for Bulk-Heterojunction Organic Photovoltaics: A Review," J. Photonics for Energy, 5, 057002 (2015). https://doi.org/10.1117/1.JPE.5.057002
C. E. Petoukhoff, D. K. Vijapurapu, D. M. O’Carroll*, "Computational Comparison of Conventional and Inverted Organic Photovoltaic Performance Parameters with Varying Metal Electrode Surface Workfunction," Sol. Energ. Mat. Sol. Cells, 120, 572-583 (2014). https://doi.org/10.1016/j.solmat.2013.09.041

Education

Ph.D., Materials Science & Engineering, Rutgers University, New Brunswick, United States of America, 2017.
B.S., Physics, University of the Sciences, Philadelphia, United States of America, 2011.
B.S., Chemistry, University of the Sciences, Philadelphia, PA, United States of America, 2011.

Professional Profile

Jan. 2022-present: Postdoctoral Fellow, KAUST, Thuwal, Saudi Arabia.
Jun. 2017-May 2021: Postdoctoral Researcher, Okinawa Institute of Science & Technology (OIST), Onna-son, Japan.
Jan. - Jun. 2019: Visiting Researcher, Tata Institute of Fundamental Research (TIFR), Mumbai, India.
Jul. 2016-Apr. 2017: Special Research Student, Okinawa Institute of Science & Technology (OIST), Onna-son, Japan.

Awards

May 2020 Sigma Pi Sigma Physics Honor Society Induction
Jun.-Aug 2015 NSF East Asia and Pacific Summer Institutes (EAPSI) - JSPS Summer Fellowship.
Sept. 2012-June 2015 NSF Integrative Graduate Education Research Traineeship (IGERT): Nanotechnology for Clean Energy
Sept. 2011-Aug. 2012 Corning, Inc. Fellowship
May 2011 Norman F. Ramsey Commencement Research Award
May 2011 Alumni Association Award for Physics
May 2010 Robert M. and May P. Jones Scholarship for Mathematics

KAUST Affiliations

KAUST Solar Center (KSC)
Division of Physical Science and Engineering (PSE)

Research Interests Keywords

Photophysics ultrafast spectroscopy Organic Photovoltaics 2D semiconductors nanophotonics