Akram N. Al-Shadeedi

@en.uobaghdad.edu.iq

College of Science / Department of Physics
University of Baghdad

Akram N. Al-Shadeedi


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https://researchid.co/akram_84

RESEARCH, TEACHING, or OTHER INTERESTS

Electronic, Optical and Magnetic Materials, Materials Science, Surfaces, Coatings and Films, Polymers and Plastics
18

Scopus Publications

259

Scholar Citations

9

Scholar h-index

8

Scholar i10-index

Scopus Publications

  • Enhanced optical response and photodetector performance of PANi/WO3 nanocomposites with controlled composition ratios
    Akram Al-Shadeedi, Maha T. Tawfeeq, Ali Adil Abbas, Ala F. Ahmed, Falah A-H. Mutlak
    Polymer Bulletin, 2026
  • The combined effect of graphene oxide/graphene compositing and Zn doping on electrochemical performance of lithium-rich cathode material of Li[Li0.20Mn0.54Ni0.13Co0.13]O2
    Rifqa Amer Salman, Omar Abdulsada Ali, Akram N. Al-Shadeedi, Ala F. Ahmed, Falah A-H. Mutlak
    Journal of Applied Electrochemistry, 2026
  • Preparation, Characterization, and Photoelectric Properties Investigation of Ag2O Nanoparticles Composited with Reduced Graphene Oxide
    Rifqa Amer Salman, Akram N. Al-Shadeedi, Omar Abdulsada Ali, Ala F. Ahmed, Falah A.-H. Mutlak
    Plasmonics, 2025
  • Effect of ZnO Doping on the Humidity Sensing Properties of the PVDF/PVA Polymeric Blend Films
    Fatima H. Mahdi, Akram N. Al-Shadeedi
    Semiconductors, 2024
    Abstract Resistive humidity sensors based on PVDF/PVA polymeric blend films doped with ZnO nanoparticles were investigated in this work. The polymeric blends were prepared by solution mixing PVDF and PVA with different (0, 1, 3, 5, and 8) weight ratios of ZnO NPs. The undoped and doped PVDF/PVA blend films were deposited on the interdigitated ITO/glass electrodes to fabricate the resistive humidity sensors. The techniques of X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), field-emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and contact angle were utilized to characterize the crystal structure, functional groups, surface morphology, and hydrophilicity of the undoped and doped PVDF/PVA sensing films. The sensing properties of the resistive humidity sensor based on the undoped and doped PVDF/PVA polymeric blend were examined by investigating the resistance change with relative humidity level (RH%) ranging from 20 to 90% at room temperature. By increasing ZnO NPs wt %, the sensitivity, response, and recovery times of the humidity sensor based on PVDF/PVA blend films showed an improvement due to the increased porosity and hydrophilicity of the sensing films. The sensor’s sensitivity ratio is enhanced from 4076 to 8073 by increasing the weight ratio of ZnO NPs from 0 to 8 wt %. Also, the response and recovery times are affected by increasing ZnO NPs from 0 to 8 wt %, which decreased from 28 to 18 s and 42 to 30 s, respectively.
  • Stability of organic permeable base transistors
    Kashi N. Subedi, Akram Al-Shadeedi, Björn Lüssem
    Applied Physics Letters, 2019
    Organic Permeable Base Transistors (OPBTs) reach a very high transit frequency and large on-state currents. However, for a later commercial application of this technology, a high operational stability is essential as well. Here, the stability of OPBTs during continuous cycling and during base bias stress is discussed. It is observed that the threshold voltage of these transistors shifts toward more positive base voltages if stressed by applying a constant potential to the base electrode for prolonged times. With the help of a 2D device simulation, it is proposed that the observed instabilities are due to charges that are trapped on top of an oxide layer formed around the base electrode. These charges are thermally released after removing the stress, and the device reaches its initial performance after around 24–48 h.
  • Suppressing Base Currents in Organic Permeable-Base Transistors by Anodization of the Base Electrode
    Shiyi Liu, Raj Kishen Radha Krishnan, Akram Al-Shadeedi, Björn Lüssem
    ACS Applied Electronic Materials, 2019
    Organic permeable base transistors (OPBTs) have long been investigated as an alternative to conventional OFETs. Their vertical architecture allows for simple low-resolution fabrication techniques, leading to short channel lengths and high current densities. However, to achieve a higher amplification in these transistors, it is essential to keep the base current a few orders of magnitude lower than the collector current. Here, it is shown that electrochemically growing a thin oxide layer on top of the base electrode of OPBT in conjunction with a self-assembled monolayer (SAMs) is capable of suppressing the base current and obtaining a higher amplification value.
  • Vertical Organic Tunnel Field-Effect Transistors
    Shiyi Liu, Max L. Tietze, Akram Al-Shadeedi, Vikash Kaphle, Changmin Keum, Björn Lüssem
    ACS Applied Electronic Materials, 2019
    Doping organic semiconductors has become a key technology to increase the performance of organic light-emitting diodes, solar cells, or field-effect transistors (OFETs). However, doping can be used...
  • Cu (In, Ga) Se2 an absorber layer of photovoltaic devices
    Mohammed A. Hameed, Akrm N. AL-Shadeedi, Abeer N. Abdulhameed, Omar Abdulsada Ali
    Journal of Physics Conference Series, 2019
    CIGS nanoink has synthesized from molecular precursors of CuCl, InCl3, GaCl3 and Se metal heat up 240 °C for a half hour in N2-atmosphere to form CIGS nanoink, and then deposited onto substrates of soda-lime glass (SLG). This work focused on CIGS nanocrystals, indicates their synthesis and applications in photovoltaic devices (PVs) as an active light absorber layers. in this work, using spin-coating to deposit CIGS layers (75 mg/ml and 500 nm thickness), without selenization at high temperatures, were obtained up to 1.398 % power conversion efficiency (PCE) at AM 1.5 solar illumination. Structural formations of CIGS chalcopyrite structure were studied by using x ray diffraction XRD. The morphology and composition of CIGS were studied using scanning electron microscopy SEM.
  • Modeling tunnel currents in organic permeable-base transistors
    Akram Al-shadeedi, Shiyi Liu, Raj Kishen Radha Krishnan, Chang-Min Keum, Vikash Kaphle, Scott D. Bunge, Björn Lüssem
    Synthetic Metals, 2019
  • Scaling of High-Performance Organic Permeable Base Transistors
    Akram Al‐Shadeedi, Shiyi Liu, Vikash Kaphle, Chang‐Min Keum, Björn Lüssem
    Advanced Electronic Materials, 2019
    Organic permeable‐base transistors (OPBTs) show potential for high‐speed, flexible electronics. Scaling laws of OPBTs are discussed and it is shown that OPBT performance can be increased by reducing their effective device area. Comparing the performance of optimized OPBTs with state‐of‐the‐art organic field‐effect transistors (OFETs), it is shown that OPBTs have a higher potential for an increased transit frequency. Not only do OPBTs reach higher transconductance values without the need for sophisticated structuring techniques, but they are also less sensitive to parasitic contact resistances. With the help of a 2D numerical model, the reduced contact resistances of OPBTs are explained by a homogeneous injection of current across the entire emitter electrode, compared to injection in a small area along the edge of the source of OFETs.
  • Tuning charge carrier transport and optical birefringence in liquid-crystalline thin films: A new design space for organic light-emitting diodes
    Chang-Min Keum, Shiyi Liu, Akram Al-Shadeedi, Vikash Kaphle, Michiel Koen Callens, Lu Han, Kristiaan Neyts, Hongping Zhao, Malte C. Gather, Scott D. Bunge, Robert J. Twieg, Antal Jakli, Björn Lüssem
    Scientific Reports, 2018
  • Doped bottom-contact organic field-effect transistors
    Shiyi Liu, Paul Billig, Akram Al-Shadeedi, Vikash Kaphle, Björn Lüssem
    Nanotechnology, 2018
  • Doped Organic Transistors - Increased Stability and Reproducibility for Active Matrix Displays
    Shiyi Liu, Akram Al-Shadeedi, Vikash Kaphle, Björn Lüssem
    Digest of Technical Papers SID International Symposium, 2018
  • Patterning organic transistors by dry-etching: The double layer lithography
    Shiyi Liu, Akram Al-Shadeedi, Vikash Kaphle, Chang-Min Keum, Björn Lüssem
    Organic Electronics, 2017
  • Charge trapping in doped organic Zener diodes
    Chang-Min Keum, Shiyi Liu, Akram Al-Shadeedi, Vikash Kaphle, Scott D. Bunge, Björn Lüssem
    Organic Electronics, 2016
  • Minority currents in n-doped organic transistors
    Akram Al-shadeedi, Shiyi Liu, Chang-Min Keum, Daniel Kasemann, Christoph Hoßbach, Johann Bartha, Scott D. Bunge, Björn Lüssem
    ACS Applied Materials and Interfaces, 2016
  • Contact Resistance Effects in Highly Doped Organic Electrochemical Transistors
    Vikash Kaphle, Shiyi Liu, Akram Al‐Shadeedi, Chang‐Min Keum, Björn Lüssem
    Advanced Materials, 2016
  • Quantifying charge trapping and molecular doping in organic p-i-n diodes
    Chang-Min Keum, Shiyi Liu, Akram Al-Shadeedi, Vikash Kaphle, Björn Lüssem
    Proceedings of SPIE the International Society for Optical Engineering, 2016

RECENT SCHOLAR PUBLICATIONS

  • Enhanced optical response and photodetector performance of PANi/WO 3 nanocomposites with controlled composition ratios
    A Al-Shadeedi, MT Tawfeeq, AA Abbas, AF Ahmed, FAH Mutlak
    Polymer Bulletin 83 (6), 332 , 2026
    2026
  • Investigation of the Effect of Zinc-Oxide Nanoparticles on the Structural and Optical Properties of PVDF-PVA Polymer Blend Thin Films
    FH Mahdi, A Al-Shadeedi
    Iraqi Journal of Physics 24 (1), 21-30 , 2026
    2026
    Citations: 1
  • Preparation, Characterization, and Photoelectric Properties Investigation of Ag2O Nanoparticles Composited with Reduced Graphene Oxide
    RA Salman, AN Al-Shadeedi, OA Ali, AF Ahmed, FAH Mutlak
    Plasmonics, 1-10 , 2025
    2025
  • Effect of ZnO doping on the humidity sensing properties of the PVDF/PVA polymeric blend films
    FH Mahdi, AN Al-Shadeedi
    Semiconductors 58 (11), 882-893 , 2024
    2024
    Citations: 5
  • Stability of organic permeable base transistors
    KN Subedi, A Al-Shadeedi, B Lüssem
    Applied Physics Letters 115 (19) , 2019
    2019
    Citations: 11
  • Suppressing base currents in organic permeable-base transistors by anodization of the base electrode
    S Liu, RK Radha Krishnan, A Al-Shadeedi, B Lüssem
    ACS Applied Electronic Materials 1 (9), 1756-1761 , 2019
    2019
    Citations: 7
  • Vertical organic tunnel field-effect transistors
    S Liu, ML Tietze, A Al-Shadeedi, V Kaphle, C Keum, B Lussem
    ACS Applied Electronic Materials 1 (8), 1506-1516 , 2019
    2019
    Citations: 12
  • Cu (In, Ga) Se2 an absorber layer of photovoltaic devices
    MA Hameed, AN AL-Shadeedi, AN Abdulhameed, O Abdulsada Ali
    Journal of Physics: Conference Series 1279 (1), 012062 , 2019
    2019
    Citations: 6
  • Modeling tunnel currents in organic permeable-base transistors
    A Al-Shadeedi, S Liu, RKR Krishnan, CM Keum, V Kaphle, SD Bunge, ...
    Synthetic Metals 252, 82-90 , 2019
    2019
    Citations: 6
  • Scaling of High‐Performance Organic Permeable Base Transistors
    A Al‐Shadeedi, S Liu, V Kaphle, CM Keum, B Lüssem
    Advanced Electronic Materials 5 (3), 1800728 , 2019
    2019
    Citations: 18
  • Doped bottom-contact organic field-effect transistors
    S Liu, P Billig, A Al-Shadeedi, V Kaphle, B Lüssem
    Nanotechnology 29 (28), 284001 , 2018
    2018
    Citations: 15
  • 67‐1: Invited Paper: Doped Organic Transistors ‐ Increased Stability and Reproducibility for Active Matrix Displays
    S Liu, A Al-Shadeedi, V Kaphle, B Lüssem
    SID Symposium Digest of Technical Papers 49 (1), 884-887 , 2018
    2018
    Citations: 4
  • Tuning charge carrier transport and optical birefringence in liquid-crystalline thin films: A new design space for organic light-emitting diodes
    CM Keum, S Liu, A Al-Shadeedi, V Kaphle, MK Callens, L Han, K Neyts, ...
    Scientific reports 8 (1), 699 , 2018
    2018
    Citations: 39
  • Patterning organic transistors by dry-etching: the double layer lithography
    S Liu, A Al-Shadeedi, V Kaphle, CM Keum, B Lüssem
    Organic Electronics 45, 124-130 , 2017
    2017
    Citations: 18
  • Lateral and vertical organic transistors
    A Al-Shadeedi
    Kent State University , 2017
    2017
    Citations: 3
  • Charge trapping in doped organic Zener diodes
    CM Keum, S Liu, A Al-Shadeedi, V Kaphle, SD Bunge, B Lüssem
    Organic Electronics 39, 77-84 , 2016
    2016
    Citations: 9
  • Minority currents in n-doped organic transistors
    A Al-Shadeedi, S Liu, CM Keum, D Kasemann, C Hoßbach, J Bartha, ...
    ACS applied materials & interfaces 8 (47), 32432-32439 , 2016
    2016
    Citations: 19
  • Quantifying charge trapping and molecular doping in organic pin diodes
    CM Keum, S Liu, A Al-Shadeedi, V Kaphle, B Lüssem
    Organic Light Emitting Materials and Devices XX 9941, 207-213 , 2016
    2016
  • Contact resistance effects in highly doped organic electrochemical transistors.
    V Kaphle, S Liu, A Al-Shadeedi, CM Keum, B Lüssem
    Advanced Materials (Deerfield Beach, Fla.) 28 (39), 8766-8770 , 2016
    2016
    Citations: 86
  • Novel Photo-patterning of Organic Semiconductors
    S Liu, A Al-shadeedi
    Bulletin of the American Physical Society 60 , 2015
    2015

MOST CITED SCHOLAR PUBLICATIONS

  • Contact resistance effects in highly doped organic electrochemical transistors.
    V Kaphle, S Liu, A Al-Shadeedi, CM Keum, B Lüssem
    Advanced Materials (Deerfield Beach, Fla.) 28 (39), 8766-8770 , 2016
    2016
    Citations: 86
  • Tuning charge carrier transport and optical birefringence in liquid-crystalline thin films: A new design space for organic light-emitting diodes
    CM Keum, S Liu, A Al-Shadeedi, V Kaphle, MK Callens, L Han, K Neyts, ...
    Scientific reports 8 (1), 699 , 2018
    2018
    Citations: 39
  • Minority currents in n-doped organic transistors
    A Al-Shadeedi, S Liu, CM Keum, D Kasemann, C Hoßbach, J Bartha, ...
    ACS applied materials & interfaces 8 (47), 32432-32439 , 2016
    2016
    Citations: 19
  • Scaling of High‐Performance Organic Permeable Base Transistors
    A Al‐Shadeedi, S Liu, V Kaphle, CM Keum, B Lüssem
    Advanced Electronic Materials 5 (3), 1800728 , 2019
    2019
    Citations: 18
  • Patterning organic transistors by dry-etching: the double layer lithography
    S Liu, A Al-Shadeedi, V Kaphle, CM Keum, B Lüssem
    Organic Electronics 45, 124-130 , 2017
    2017
    Citations: 18
  • Doped bottom-contact organic field-effect transistors
    S Liu, P Billig, A Al-Shadeedi, V Kaphle, B Lüssem
    Nanotechnology 29 (28), 284001 , 2018
    2018
    Citations: 15
  • Vertical organic tunnel field-effect transistors
    S Liu, ML Tietze, A Al-Shadeedi, V Kaphle, C Keum, B Lussem
    ACS Applied Electronic Materials 1 (8), 1506-1516 , 2019
    2019
    Citations: 12
  • Stability of organic permeable base transistors
    KN Subedi, A Al-Shadeedi, B Lüssem
    Applied Physics Letters 115 (19) , 2019
    2019
    Citations: 11
  • Charge trapping in doped organic Zener diodes
    CM Keum, S Liu, A Al-Shadeedi, V Kaphle, SD Bunge, B Lüssem
    Organic Electronics 39, 77-84 , 2016
    2016
    Citations: 9
  • Suppressing base currents in organic permeable-base transistors by anodization of the base electrode
    S Liu, RK Radha Krishnan, A Al-Shadeedi, B Lüssem
    ACS Applied Electronic Materials 1 (9), 1756-1761 , 2019
    2019
    Citations: 7
  • Cu (In, Ga) Se2 an absorber layer of photovoltaic devices
    MA Hameed, AN AL-Shadeedi, AN Abdulhameed, O Abdulsada Ali
    Journal of Physics: Conference Series 1279 (1), 012062 , 2019
    2019
    Citations: 6
  • Modeling tunnel currents in organic permeable-base transistors
    A Al-Shadeedi, S Liu, RKR Krishnan, CM Keum, V Kaphle, SD Bunge, ...
    Synthetic Metals 252, 82-90 , 2019
    2019
    Citations: 6
  • Effect of ZnO doping on the humidity sensing properties of the PVDF/PVA polymeric blend films
    FH Mahdi, AN Al-Shadeedi
    Semiconductors 58 (11), 882-893 , 2024
    2024
    Citations: 5
  • 67‐1: Invited Paper: Doped Organic Transistors ‐ Increased Stability and Reproducibility for Active Matrix Displays
    S Liu, A Al-Shadeedi, V Kaphle, B Lüssem
    SID Symposium Digest of Technical Papers 49 (1), 884-887 , 2018
    2018
    Citations: 4
  • Lateral and vertical organic transistors
    A Al-Shadeedi
    Kent State University , 2017
    2017
    Citations: 3
  • Investigation of the Effect of Zinc-Oxide Nanoparticles on the Structural and Optical Properties of PVDF-PVA Polymer Blend Thin Films
    FH Mahdi, A Al-Shadeedi
    Iraqi Journal of Physics 24 (1), 21-30 , 2026
    2026
    Citations: 1
  • Enhanced optical response and photodetector performance of PANi/WO 3 nanocomposites with controlled composition ratios
    A Al-Shadeedi, MT Tawfeeq, AA Abbas, AF Ahmed, FAH Mutlak
    Polymer Bulletin 83 (6), 332 , 2026
    2026
  • Preparation, Characterization, and Photoelectric Properties Investigation of Ag2O Nanoparticles Composited with Reduced Graphene Oxide
    RA Salman, AN Al-Shadeedi, OA Ali, AF Ahmed, FAH Mutlak
    Plasmonics, 1-10 , 2025
    2025
  • Quantifying charge trapping and molecular doping in organic pin diodes
    CM Keum, S Liu, A Al-Shadeedi, V Kaphle, B Lüssem
    Organic Light Emitting Materials and Devices XX 9941, 207-213 , 2016
    2016
  • Novel Photo-patterning of Organic Semiconductors
    S Liu, A Al-shadeedi
    Bulletin of the American Physical Society 60 , 2015
    2015