Qatar University Young Scientists Center: المرسلات الحديثة
السجلات المعروضة 181 -- 200 من 202
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Review on two-terminal and four-terminal crystalline-silicon/perovskite tandem solar cells; progress, challenges, and future perspectives
( Elsevier , 2022 , Article Review)Silicon (Si) solar cells are the dominant and well-developed solar technology holding more than 95% share of the photovoltaic market with efficiencies over 26%. Still, this value is far away from the Shockley–Queisser limit ... -
Metal halide-based photodetector using one-dimensional MAPbI3 micro rods
( Springer , 2020 , Article)In the present work, we report the fabrication of a photodetector using methylammonium lead iodide perovskite (MAPbI3) micro rod. Photosensitivity of the Ag/MAPbI3/Ag photodetector has been studied under various light ... -
Exploring Teachers’ Perceptions of the Barriers to Teaching STEM in High Schools in Qatar
( MDPI , 2022 , Article)Understanding teachers’ attitudes and perceptions of STEM teaching is a key pathway to enhance effective STEM teaching. Inarguably, teachers are the cornerstone of educational quality and play a central role in students’ ... -
Thermal and mechanical stability of microwave sintered cold compact bismuth telluride thermoelectric material
( Elsevier , 2022 , Article)Both p-type and n-type bismuth telluride (Bi2Te3)-based thermoelectric materials demonstrate high thermoelectric efficiency in the low-temperature thermoelectric modules, but their constrained thermal and mechanical stability ... -
Microstructure and mechanical properties of aluminum matrix composites with bimodal-sized hybrid NbC-B4C reinforcements
( Elsevier , 2022 , Article)Aluminum (Al) is an earth-abundant metal recognized with superior properties for vital applications in the aerospace and transportation industries. Structural components of Al exhibit poor performance due to its inherent ... -
Pedagogical models to implement effective stem research experience programs in high school students
( MDPI , 2021 , Article Review)High school research experience programs (HSREPs) provide opportunities for true science education and expose students to scientific investigations in laboratory settings. Various HSREPs models have been practiced to shape ... -
A distinctive method of online interactive learning in stem education
( MDPI , 2021 , Article)A breakthrough that has occurred in recent years is the emergence of the COVID-19 pandemic. It has affected various sectors of society, including the educational sector. It has prevented students from performing group-oriented ... -
A lightweight neural network with multiscale feature enhancement for liver CT segmentation
( Nature Research , 2022 , Article)Segmentation of abdominal Computed Tomography (CT) scan is essential for analyzing, diagnosing, and treating visceral organ diseases (e.g., hepatocellular carcinoma). This paper proposes a novel neural network (Res-PAC-UNet) ... -
Hierarchical BaTiO3/NiFe2O4 nanocomposite as an efficacious photoanode for photoelectrochemical water splitting
( Elsevier , 2022 , Article)Photocatalysis of water for the production of oxygen and hydrogen is one of the most important development in the drive for clean energy, and it has received a lot of attention because it is a green and easy step to generate ... -
Promising transparent and flexible thermoelectric modules based on p-type CuI thin films—A review
( Elsevier , 2022 , Article Review)The state-of-the-art thermoelectric technology owns a unique capability of direct, noise-free, and efficient conversion of waste heat into valuable electricity. The conventional thermoelectric generators are complex and ... -
Effect of the temperature on the passivity of the modified martensitic stainless steels
( Taylor and Francis Group , 2022 , Article)The limits and nature of the passive behavior exhibited by modified martensitic stainless steels (MMSS) is studied in brine solutions at different temperatures using electrochemical methods and the point defect model (PDM), ... -
Effect of cold and hot compactions on corrosion behavior of p- and n-type bismuth telluride-based alloys developed through microwave sintering process
( Elsevier , 2023 , Article)Bismuth Telluride (BiTe) based p-type and n-type alloys exhibit superior thermoelectric (TE) performance covering energy requirements for specialized and home utilization. The main challenge nowadays is the sustainability ... -
Effect of illumination and applied potential on the electrochemical impedance spectra in triple cation (FA/MA/Cs) 3D and 2D/3D perovskite solar cells
( Elsevier , 2021 , Article)Even though there has been numerous works performed based on electrochemical impedance spectroscopy (EIS) of perovskite solar cells (PSCs), however, many aspects of the obtained EI spectra are yet to be fully grasped. ... -
Numerical simulation to optimize the efficiency of HTM-free perovskite solar cells by ETM engineering
( Elsevier , 2023 , Article)Perovskite solar cells based on carbon electrodes (c-PSCs) without a hole transport material (HTM) have gained considerable interest owing to their cost-effective and simplified structure. However, their application is ... -
TiO2 encrusted MXene as a High-Performance anode material for Li-ion batteries
( Elsevier B.V. , 2022 , Article)TiO2 has the potential to be a viable anode material for high-power lithium-ion batteries (LIBs). However, the lower electronic conductivity of TiO2 limits its practical applications. Here, the synthesis of novel TiO2 ... -
Study on the corrosion behavior of polymeric nanocomposite coatings containing halloysite nanotubes loaded with multicomponent inhibitor
( Elsevier B.V. , 2022 , Article)In the present study, the halloysite nanotubes (HNTs) were loaded with a multicomponent inhibitor (LHNT) comprising mainly benzotriazole (BTA), sodium benzoate (SB), and lauric acid (LA) via the vacuum cycling method. The ... -
Effect of sulfonated poly (ether ether ketone) on the sensitivity of polyvinylidene fluoride-based resistive humidity sensors
( Elsevier Ltd , 2020 , Article)We have investigated the effect of sulfonated poly (ether ether ketone) (SPEEK) on the thermal stability, hydrophilicity, and sensitivity of polyvinylidene fluoride (PVDF) films based resistive humidity sensors. The blended ... -
Low-toxic, earth-abundant nanostructured materials for thermoelectric applications
( MDPI AG , 2021 , Article)This article presents recent research directions in the study of Earth-abundant, cost-effective, and low-toxic advanced nanostructured materials for thermoelectric generator (TEG) applications. This study’s critical aspect ... -
Humidity sensor based on poly(lactic acid)/PANI-ZnO composite electrospun fibers
( Royal Society of Chemistry , 2021 , Article)The electrospinning technique has been successfully used to prepared micro-fibers of the poly(lactic acid)/polyaniline–zinc oxide (PLA/PANI–ZnO) composite. The polyaniline–zinc oxide (PANI–ZnO) nanocomposites are synthesized ... -
Study of polyaniline-silver nanocomposite as humidity sensor
( Hamad bin Khalifa University Press (HBKU Press) , 2018 , Conference Paper)Study of polyaniline-silver nanocomposite as humidity sensor J. Bhadra, A. Popelka, N. J. Al-Thani, A. Abdulkareem Center for Advanced Materials, Qatar University, Qatar Abstract In this piece of work focus on fabrication ...