Browsing by Author "Ahmad, Zubair"
Now showing items 1-20 of 116
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2D-MXene as an additive to improve the power conversion efficiency of monolithic perovskite solar cells
( Elsevier B.V. , 2022 , Article)In this study, two-dimensional (2D) material-MXene has been utilized as an additive in perovskite (MAPbI3) from 0 to 20 vol.% with an increment of 5 vol.%. The effect of different vol.% of 2D-MXene on monolithic perovskite ... -
3D printing flexible Ga-doped ZnO films for wearable energy harvesting: thermoelectric and piezoelectric nanogenerators
( Springer , 2024 , Article)The 3D printing of energy harvesters using earth-abundant and non-toxic elements promotes energy sustainability and market competitiveness. The semiconducting behavior and non-centrosymmetric wurtzite crystal structure of ... -
A comparative study on the performance of hybrid solar cells containing ZnSTe QDs in hole transporting layer and photoactive layer
( Springer Netherlands , 2016 , Article)In this paper, ZnSTe quantum dots-based hybrid solar cells (HSC) with two different device architectures have been investigated. The improved performance of the poly(3-hexylthiophene) (P3HT) and [6,6]phenyl C71 butyric ... -
A Meta-Analysis to Gauge the Effectiveness of STEM Informal Project-Based Learning: Investigating the Potential Moderator Variables
( Springer Science and Business Media B.V. , 2023 , Article Review)In recent decades, informal project-based learning (PjBL) for science, technology, engineering, and mathematics (STEM) education has gained immense significance. Though some meta-analytical studies have reported the ... -
A novel classification of prostate specific antigen (PSA) biosensors based on transducing elements
( Elsevier B.V. , 2017 , Article Review)During the last few decades, there has been a tremendous rise in the number of research studies dedicated towards the development of diagnostic tools based on bio-sensing technology for the early detection of various ... -
A short analysis on the morphological characterization of colloidal quantum dots for photovoltaic applications
( Bentham Science Publishers , 2020 , Article Review)Due to its various advantages, colloidal quantum dots (CQDs) carry a prodigious deal of interest in low-cost photovoltaics. The possibility of tailored band gaps via quantum confinement effect facilitates photovoltaic ... -
A STEM model for engaging students in environmental sustainability programs through a problem-solving approach
( Routledge , 2023 , Article)This study exemplifies a STEM model for engaging students in environmental sustainability programs through a problem-solving approach. The study employed a mixed-method approach incorporating 346 elementary students. The ... -
A STEM Model to Engage Students in Sustainable Science Education through Sports: A Case Study in Qatar
( Qatar University Press , 2021 , Poster)Sports is a powerful tool to make deeper connections, stimulations, and understanding of STEM (science, technology, engineering, and mathematics) education. Science in sports is a unique program established to present ... -
Capacitive type Humidity sensor based on PANI decorated Cu-ZnS porous micropshere
( Qatar University Press , 2020 , Poster)PANI coated Cu-ZnS porous microsphere structures have been synthesized by hydrothermal method and in-situ polymerization process. The synthesized composite is characterized by different techniques in order to study the ... -
Capacitive type humidity sensor based on PANI decorated Cu-ZnS porous microspheres
( Elsevier , 2020 , Article)Porous microstructure materials are considered good candidates for the development of highly sensitive and fast humidity sensors. In this regard, we prepared polyaniline (PANI) decorated Cu-ZnS porous microsphere structures ... -
Cardiovascular challenges in the era of antiretroviral therapy for AIDS/ HIV: A comprehensive review of research advancements, pathophysiological insights, and future directions
( Elsevier , 2024 , Article Review)Cardiovascular disease, particularly coronary heart disease, is becoming more common among those living with HIV. Individuals with HIV face an increased susceptibility to myocardial infarction, also known as a heart attack, ... -
Colloidal distribution of the PCPDTBT and VOPcPhO in the organic amalgam thin films and their optical properties
( Springer Verlag , 2017 , Article)In this article, we investigated the optical properties and colloidal distribution of the PCPDTBT and VOPcPhO in the organic amalgam thin films prepared by spin-coating technique. A very even dispersion of donor and acceptor ... -
Compositional engineering of the pi-conjugated small molecular VOPcPhO : Alq3 complex to boost humidity sensing
( Royal Society of Chemistry , 2017 , Article)This study exhibits a solution-processed organic semiconductor humidity sensor based on vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO), tris-(8-hydroxy-quinoline)aluminum (Alq3), and their composites. ... -
Compositional engineering of VOPcPhO-TiO2 nano-composite to reduce the absolute threshold value of humidity sensors
( Elsevier B.V. , 2017 , Article)This research work demonstrates compositional engineering of an organic-inorganic hybrid nano-composites for modifying absolute threshold of humidity sensors. Vanadyl-2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO), ... -
Covid-19 inspired a stem-based virtual learning model for middle schools—a case study of Qatar
( MDPI , 2021 , Article)An unprecedented turn in educational pedagogies due to the COVID-19 pandemic has significantly affected the students’ learning process worldwide. This article describes developing a STEM-based online course during the ... -
Cultivating STEM Interest in High School Students through Computer-assisted COVID-19 Pandemic Awareness Course
( IIKII , 2022 , Article)Due to the COVID-19 pandemic, students were sidetracked by the shift in the educational process, primarily in the field of STEM (science, technology, engineering, mathematics) education. Teachers were also besieged to find ... -
Degradation analysis in mixed (MAPbI3 and MAPbBr3) perovskite solar cells under thermal stress
( Springer New York LLC , 2019 , Article)The current study provides an insight into the thermal stability of perovskite solar cells (PSCs) and the factors causing their degradation. To this end, a systematic stability study was carried out on n-i-p type perovskite ... -
Design and optimization of four-terminal mechanically stacked and optically coupled silicon/perovskite tandem solar cells with over 28% efficiency
( Elsevier , 2023 , Article)Silicon/perovskite tandem devices are believed to be a favorite contender for improving cell performance over the theoretical maximum value of single-junction photovoltaic (PV) cells. The present study evaluates the design ... -
Design of a semiconductor photoelectrochemical cells using orange dye and NaCl aqueous solutions
( Elsevier , 2020 , Article)This paper describes a new design of the semitransparent photo-electrochemical cells using the orange dye (C17H17N5O2) and NaCl aqueous solutions. In the proposed design, the semi-transparency is realized by fabrication ... -
Development and validation of teacher artificial intelligence (AI) competence self-efficacy (TAICS) scale
( Springer Nature , 2024 , Article)Evaluating teacher AI competence levels and building effective, safe, and healthy learning environment are crucial steps in transitioning to AI-based education. Current established digital competence frameworks may indirectly ...
