Omar F. Mohammed, Ph.D.

Faculty

Professor of Chemical and Material Sciences

Social Profile:

Research Interests

  1. The development of laser spectroscopy and four-dimensional (4D) electron microscopy for mapping charge carrier dynamics of photoactive materials in real space and real time.
  2. The development of highly efficient solar cells, light-emitting diodes and photo-detectors with the aid of cutting-edge nanotechnology, laser spectroscopy, ultrafast electron imaging and ab-initio simulations.
  3. Fluorescence sensing and ultrafast energy transfer in highly ordered materials including MOFs.
  4. Carrier dynamics in low-dimensional perovskite materials .
  5. Real-space imaging of ultrafast carrier dynamics selectively on the surface and at the inferface of photoactive materials including semiconductor quantum dots and nanowires.

Selected Publications

  • Access to Highly Efficient Energy Transfer in Metal-Organic Frameworks via Mixed Linkers Approach
    J. Jia, L. Gutiérrez-Arzaluz, O. Shekhah, N. Alsadun, J. Czaban-Jóźwiak, S. Zhou, O. M. Ba...
    J. Am. Chem. Soc. 2020, (2020)
  • Unprecedented Ultralow Detection Limit of Amines using a Thiadiazole-Functionalized Zr(IV)-Based Metal–Organic Fram...
    A. Mallick, A.M. El-Zohry, O. Shekhah, J. Yin, J. Jia, H. Aggarwal, A.-H. Emwas, O.F. Moha...
    J. Am. Chem. Soc., 141 (18), pp. 7245-7249, (2019)
  • Modulation of Broadband Emissions in Two-dimensional< 100>-oriented Ruddlesden-Popper Hybrid Perovskites
    . J. Yin, R. Naphade, L. Gutierrez Arzaluz, J-L. Bredas, O. M. Bakr, O. F. Mohammed*
    ACS Energy Letters, 5, 7, 21492155, (2020)
  • Boosting Self-Trapped Emissions in Zero-Dimensional Perovskite Heterostructures
    J. Yin, J-L. Bredas, O. M. Bakr, O. F. Mohammed*
    Chemistry of Materials, 32, 12, 50365043, (2020)
  • Low Temperature Crystallization Enables 21.9% Efficient Single-Crystal MAPbI3 Inverted Perovskite Solar Cells
    A. Y. Alsalloum, B. Turedi, X. Zheng, C. Yang, X. Zheng, S. Mitra, A. Zhumekenov,K. Lee, P...
    ACS Energy Letters, 5, 657-662, (2020)
  • Tuning Hot Carrier Cooling Dynamics by Dielectric Confinement in Two-Dimensional Hybride Perosvkite Crystals
    J. Yin, P. Maity,R. Naphade, V. Cheng, J-H. He, O. M. Bakr, J-L. Brédas, O. F. Mohammed*
    ACS Nano, 13, 12621-12629, (2019)
  • Extraordinary Carrier Diffusion on CdTe Surfaces Uncovered by 4D Electron Microscopy
    A. M. El-Zohry, B. S. Shaheen, V. M. Burlakov, J. Yin, M. N. Hedhili, S. Shikin, B. S. Ooi...
    Chem, 5, 706-718, (2019)
  • Emergence of multiple fluorophores in individual cesium lead bromide nanocrystals
    Y. Zhang, T. Guo, H. Yang, R. Bose, L. Liu, J. Yin, Y. Han, O. M. Bakr, O. F. Mohammed*, ...
    Nature Communications, 10, 2930, (2019)
  • Outstanding Challenges of Zero-Dimensional Perovskite Materials
    O. F. Mohammed*
    Journal of Physical Chemistry Letters, 10, 5886-5888 , (2019)
  • Visualization of Charge Carrier Trapping in Silicon at the Atomic Surface Level Using Four-Dimensional Electron Im...
    B. S. Shaheen, A. M. El-Zohry, J. Yin, M. De Bastiani, S. De Wolf, O. M. Bakr, O. F. Moham...
    Journal of Physical Chemistry Letters, 10, 19601966 , (2019)

Education

  • ​Ph.D in Physical Chemistry from Humboldt University of Berlin, Germany (2006).

Professional Profile

  • ​2019-present Associate Professor, Division of Physical Sciences and Engineering, KAUST, KSA
  • 2012-2018 Assistant Professor, Division of Physical Sciences and Engineering, KAUST, KSA 
  • 2008-2012 Senior Research Associate, Laboratory for Molecular Sciences, California Institute of Technology, Pasadena, CA 91125, U.S.A 
  • 2007-2008: Postdoctoral Fellow (JSPS), RIKEN (Institute of Chemical and Physical Research), Hirosawa, Wako, Saitama, 351-0198, Japan
  • 2006-2007: Postdoctoral Fellow, University of Geneva,Geneva 4, Switzerland 
  • 2002-2006: Long-term Fellowship for PhD, Max-Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born Strasse 2A, D-12489 Berlin, Germany 

Scientific and Professional Membership

  • ​ACS Member
  • MRS member

Awards

  • ​2002-2006: Long-term fellowship (4 years), Max-Born Institute, Berlin, Germany
  • 2006-2007: Post-doctoral Fellowship, University of Geneva, Switzerland
  • 2007-2008: JSPS fellowship & Special post-doctoral researcher (RIKEN fellowship), RIKEN, Japan
  • 2009-2010: Distinguished scholar award from Arab Fund for Economic and Social Development
  • 2010-2011: The State Prize in Basic Sciences, Egypt

KAUST Affiliations

Research Interests Keywords

​Ultrafast Spectroscopy 4D Electron Imaging Computational Materials Quantum Dots Perosvkite Solar Cells Light-Emitting Diodes X-Ray imaging Fluorescence Sensing Interfacial Carrier Dynamics Low Dimensional Materials Surface and Interface Charge Carriers Dynamics