Publications

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