Ala Khalaf Jehad
Research InterestsPhysics
Semiconductors
Photovoltaics
Solar cells
Graphene
Photodetectors
Nano structures
| Gender | FEMALE |
|---|---|
| Place of Work | Technical Engineering College/ Kirkuk |
| Position | Lecturer |
| Qualification | PhD |
| Speciality | Physics |
| ala.jehad13@ntu.edu.iq | |
| Phone | 07715957075 |
| Address | NTU_Kirkuk-Iraq, Kirkuk, Kirkuk, Iraq |
Academic Qualification
PhD
Feb 20, 2017 - Mar 17, 2021PhD in Physics from Dokuz Eylul University
Izmir-Turkey in 2021
MSc
Feb 22, 2009 - May 18, 2013MSc in Physics from Benghazi University
Benghazi-Libya in 2013
BSc
Sep 4, 2005 - Jul 15, 2008BSc in Physics from Benghazi University
Benghazi-Libya in 2008
Publications
Graphene-based photocatalysts for biomedical applications
Oct 3, 2024publisher Springer Nature Switzerland
DOI https://doi.org/10.1007/978-3-031-66260-7_21
This chapter examines the diverse applications of graphene-based nanomaterials (GBNs) in biomedical applications, highlighting their roles in drug delivery, biosensors, imaging, and antibacterial applications. Graphene’s compatibility with biological tissues and its capacity to interact with cells emerge it as a notable material in biomedicine. The exceptional specific surface area and unique structure of GBNs enable strong adsorption capabilities and promising carrier functionalities. Furthermore, the modification of graphene oxide (GO) and reduced graphene oxide (rGO) with various substances enhances their water solubility, targeting capabilities, and biocompatibility.
High voltage response of graphene/4H-SiC UV photodetector with low level detection
Dec 25, 2023Journal Journal of Alloys and Compounds
publisher Elsevier
DOI https://doi.org/10.1016/j.jallcom.2023.172288
Volume 969
A self-powered graphene/silicon carbide (G/4H-SiC) ultraviolet photodetector of a p-i-n like-structure with high voltage response has been fabricated to detect and measure low intensity ultraviolet (UV) radiation. Bilayer graphene sheet grown by chemical vapor deposition (CVD) method was transferred on the top of an epilayer structure of n-/n+ 4 H-SiC. In this structure, two Schottky contacts were formed: one at G/ n- 4H-SiC interface and the other at bulk-4 H-SiC/Cr/Au interface. The photodetector's characteristic measurements revealed low dark current of ∼ 0.58 nA and spectral voltage responsivity of ∼ 0.75 V/W at 300 nm wavelength.
CVD graphene/SiC UV photodetector with enhanced spectral responsivity and response speed
Jun 1, 2023Journal Sensors and Actuators A: Physical
publisher Elsevier
DOI https://doi.org/10.1016/j.sna.2023.114309
Volume 355
A self-powered, high-performance graphene/Silicon Carbide (G/4H-SiC) ultraviolet Schottky junction photodetector has been fabricated, and the effect of using monolayer and bilayer graphene on the device performance parameters was investigated. P-type graphene sheets were grown by the chemical vapor deposition (CVD) method, while 4H-SiC material consists of an epilayer structure of n-/n+ on bulk n-SiC. Two photodetector devices have been studied, one with monolayer graphene (MLG) and the other with bilayer graphene (BLG). The proposed photodetector structure reveals the highest spectral responsivity known of a G/4H-SiC UV photodetector so far.
Investigation of graphene-based Schottky junction solar cell with heavy-doped silicon
Oct 27, 2021Journal Journal of Materials Science: Materials in Electronics
publisher Springer US
DOI https://doi.org/10.1007/s10854-021-07270-x
Due to its outstanding features, graphene has become a vital topic in nanotechnology applications such as optoelectronic devices, sensors, batteries, and biomedical applications. This study has been focused on examining a heavily doped semiconductor in order to fabricate Schottky junction solar cell, where p-type graphene with heavily doped n-type silicon (p-G/n+-Si) Schottky junction solar cell with a top-window structure and active area of 0.11 cm2 has been fabricated using simple techniques without photolithography system. High-quality monolayer graphene sheet was synthesized by CVD method, while the back- and front-metal contacts were achieved by thermal evaporation system using Cr, Ag, and Au.
A comparative study for producing few-layer graphene sheets via electrochemical and microwave-assisted exfoliation from graphite powder
Mar 28, 2020Journal Journal of Materials Science: Materials in Electronics
publisher Springer US
DOI https://doi.org/10.1007/s10854-020-03268-z
Issue 9
Volume 31
Graphene’s astonishing properties drew attention of many scientists to dedicate a lot of their time to find out more about this extraordinary material. However, challenges continue to produce high-quality graphene in large quantities by using inexpensive and readily available methods. In this study, three different graphite powders have been used as starting materials to produce few-layer graphene sheets, which are pure natural graphite (NGr) and two different electrochemically treated expanded graphite EE1 and EE2. Two simple and time-effective techniques have been applied on the samples interchangeably to investigate the order effect on producing graphene sheets in few-layer form. These techniques are sonication in dimethylformamide (DMF) for one hour and rapid microwave irradiation for 30 s.
Conferences
Self-powered Graphene/4H-SiC ultraviolet photodetector with low level light detection
Aug 27, 2023 - Aug 29, 2023Publisher Izmir Institute of Technology (IZTECH)
Country Turkey
Location Izmir-Turkey
Production and application of CVD Graphene in Solar cells
Aug 24, 2021 - Aug 28, 2021Country Turkey
Location