support@kaust.edu.sa
+966 (12) 808-3463
  • العربية
logo-black
  • Home
  • People
    • Current
    • Alumni
  • Publications
    • 2021
    • 2020
    • 2019
    • 2018
    • 2017
    • 2016
    • 2015
    • 2014
    • 2013
    • 2012
    • 2011
    • 2010
    • 2009
  • Research
    • Current Research
  • Collaboration
  • News
  • Facilities
  • Join us
  • Contact us
  • Conferences
Semiconductor and Material Spectroscopy Laboratory
breadcrumb-bg

Publications

  • Clear filters
Sub-quantum-well influence on carrier dynamics in high efficiency DUV dislocation-free AlGaN/AlGaN-based multiple-quantum-wells
Year: 2020
Authors: Idris A. Ajia, Dhaifallah Almalawi, ·        Yi Lu, Sergei Lopatin, Xiaohang Li, Zhiqiang Liu, Iman S. Roqan
  • Sub-quantum-well influence on carrier dynamics in high efficiency DUV dislocation-free AlGaN/AlGaN-based multiple-quantum-wells
Method and apparatus for fabricating high performance optoelectronic devices
Year: 2020
Authors: Somak Mitra, Iman S Roqan, Yusin Pak
Enhanced UV Emission of GaN Nanowires Functionalized by Wider Band Gap Solution-Processed p-MnO Quantum Dots
Year: 2020 DOI:doi.org/10.1021/acsami.0c07029
Authors: Dhaifallah Almalawi, Sergei Lopatin, Somak Mitra, Tahani Flemban, Alexandra-Madalina Siladie, Bruno Gayral, Bruno Daudin, Iman S. Roqan
  • III-Nitrides
  • semiconductor nanowires
  • light-emitting devices
  • p-type MnO quantum dots
  • electron energy loss spectroscopy
Understanding the origins of ultralong radiative states in metal halide perovskite crystals
Year: 2018
Authors: Erkki Alarousu , Ahmed El-Zohry, Kwangjae Lee, Bekir Turedi, Ibrahim Dursun, Jun Yin, Ayan Zhumekenov, Somak Mitra, Iman Salem Roqan, Chen Yang , Anton Malko, Mohammed Omar, Osman Bakr
  • halide perovskite crystals
Patent: Synthesis of vertically aligned metal oxide nanostructures
Year: 2018
Authors: Iman Salem Roqan, Tahani Hassan Flemban
  • Nanostructures
Scalable integration of periodically aligned 2D-MoS2 nanoribbon array
Year: 2018
Authors: Yusin Pak, Yonghum Kim, N. Lim, J-W Min, Woojin Park, W. Kim, Y. Jeong, H. Kim, Somak Mitra, B. Xin, T-W Kim, Iman Salem Roqan, Byungjin Cho, Gun-Young Jung, K. Kim
  • Two-dimensional (2D) Molybdenum Disulfide
GaN/AlGaN multiple quantum wells grown on transparent and conductive −201-oriented β-Ga2O3 substrate for UV vertical light emitting devices
Year: 2018
Authors: Idris A. Ajia, Y. Yamashita, K. Lorenz, M.M. Muhammed, L. Spasevski, D. Almalawi, Jian Xu, K. Lizuka, Y. Morishima, DH Anjum, N. Wei, R.W. Martin, A. Kuramata, Iman Salem Roqan
  • III-nitride semiconductors
Freestanding patterned polycrystalline GaN substrate by a straightforward and affordable technique
Year: 2018
Authors: N. Zainal, MEA Samsudin, Muhamad Ikram Md Taib, MA. Ahmad, A. Ariff, N. Alwadai, Iman Salem Roqan
  • GaN
​Analysis on the energetics, magnetism and electronic properties in a 45° ZnO grain boundary doped with Gd
Year: 2018
Authors: Assa Aravindh, Iman Salem Roqan
  • Magnetism
  • ZnO
High-performance solar-blind flexible deep-UV photodetectors based on quantum dots synthesized by femtosecond-laser ablation
Year: 2018
Authors: Somak Mitra, Assa Aravindh, Gobind Das, Yusin Pak, Idris A. Ajia, Kalaivanan Loganathan, Enzo Di Fabrizio, Iman Salem Roqan
  • Deep-Ultraviolet DUV
  • Femtosecond-laser ablation in liquid
  • Flexible photodetector
  • Quantum dots QDs
  • ZnO Zinc nitride
Carrier dynamics of InxGa1-xN/GaN multiple quantum wells grown on (−201) β-Ga2O3 for bright vertical light emitting diodes
Year: 2018
Authors: Mufasila Mumthaz Muhammed, Jian Xu, Nimer Wehbe, Iman Salem Roqan
  • Optoelectronics
  • Spectroscopy
  • Time-resolved
  • Multiple Quantum Well
Surface-Passivated AlGaN Nanowires for Enhanced Luminescence of Ultraviolet Light Emitting Diodes
Year: 2018
Authors: Haiding Sun, Mohammad Khaled Shakfa, Mufasila Mumthaz Muhammed, Bilaj Janjua, Kuang-Hui Li, Ronghui Lin, Tien Khee Ng, Iman Salem Roqan, Boon S. Ooi, Xiaohang Li
  • Aluminum Gallium Nitride Nanowire
  • passivation
  • Potassium Hydroxide
  • Surface Oxides and States
  • Surface Recombination
  • Ultraviolet Light Emitting Diode
Fabrication and optical characterization of GaN waveguides on −201 -oriented b Ga2O3
Year: 2018
Authors: Ashif M. Awan, M.M. Muhammed, Madhavi Sivan, Spencer Bonca, Iman Salem Roqan, Ksenia Dolgaleva
  • GaN
Generated carrier dynamics in V-pit enhanced InGaN/GaN light emitting diode
Year: 2018
Authors: Idris A. Ajia, E. Belekov, M. A. Roldan, N. Wei, Z. Liu, Iman Salem Roqan
  • Carrier Dynamics
  • Efficiency Droop
  • InGaN
  • Light-Emitting Diode
  • Time-resolved Spectroscopy
Enhanced Performance of MoS2 Photodetectors by Inserting a ALD-Processed TiO2 Interlayer
Year: 2018
Authors: Yusin Pak, Woojin Park, Somak Mitra, Assa Aravindh Sasikalav Devi, Kalaivanan Loganathan, Kumaresan Yogeenth, Yonghum Kim, Byungjin Cho, Gun-Young Jung, Muhammad M. Hussain, Iman Salem Roqan
  • Atomic Layer Deposition
  • Interlayer
  • Molybdenum Disulfide
  • Photodetectors
  • Titanium Dioxide
“Fabrication of rare earth doped ZnO NR /perovskite photodetector on flexible metal sheet"
Year: 2017
Authors: Iman Salem Roqan, Norah Alwadai, Somak Mitra
  • Perovskite
“High Metal-Oxide nanoparticles based optical materials synthesised by ultrafast laser ablation and scaling up procedure for optoelectronic device fabrication"
Year: 2017
Authors: Somak Mitra, Iman Salem Roqan, Yusin Pak
  • Nanoparticles
A Photodetector based on p-Si/n-ZnO Nanotube Heterojunctions with High Ultraviolet Responsivity
Year: 2017
Authors: Tahani Hassan Flemban, Md. Azimul Haque, Idris A. Ajia, Norah Alwadai, Somak Mitra, Tom Wu, Iman Salem Roqan
  • Photodetectors
  • Oxides
  • Time-resolved Measurements
  • Nanotubes
  • Heterojunctions
  • Ultraviolet
  • Pulsed Laser Depositions
High-Efficiency InGaN/GaN Quantum Well-Based Vertical Light-Emitting Diodes Fabricated on β-Ga2O3 Substrate
Year: 2017
Authors: Mufasila Mumthaz Muhammed, Norah Alwadai, Sergei Lopatin, Akito Kuramata, Iman Salem Roqan
  • Vertical Light Emitting Diode
  • Electroluminescence
  • Time-resolved Photoluminescence
  • Gallium Oxide
  • Scanning Transmission Electron Microscopy
Critical Fluctuations and Anharmonicity in Lead Iodide Perovskites from Molecular Dynamics Supercell Simulations
Year: 2017
Authors: Marcelo A. Carignano, Assa Aravindh, Iman Salem Roqan, Jacky Even, Claudine Katan
  • Perovskite
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
logo-white

"KAUST shall be a beacon for peace, hope and reconciliation, and shall serve the people of the Kingdom and the world."

King Abdullah bin Abdulaziz Al Saud, 1924 – 2015

Contact Us

  • +966 (12) 808 4340
  • Iman.roqan@kaust.edu.sa
  • 4700 King Abdullah University of Science and Technology

    Building 3, Level 3

    Thuwal 23955-6900

    Kingdom of Saudi Arabia

Quick links

  • Join us
  • Contact us

© King Abdullah University of Science and Technology. All rights reserved

Privacy Policy
Terms of Use