Browsing by Author "Bhadra, Jolly"
Now showing items 21-40 of 43
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Growth of MAPbBr3 perovskite crystals and its interfacial properties with Al and Ag contacts for perovskite solar cells
Najeeb, Mansoor Ani; Ahmad, Zubair; Shakoor, R.A.; Alashraf, Abdulla; Bhadra, Jolly; Al-Thani, N.J.; Al-Muhtaseb, Shaheen A.; Mohamed, A.M.A.... more authors ... less authors ( Elsevier B.V. , 2017 , Article)In this work, the MAPbBr3 perovskite crystals were grown and the interfacial properties of the poly-crystalline MAPbBr3 with Aluminum (Al) and Silver (Ag) contacts has been investigated. MAPbBr3 crystals are turned into ... -
Hierarchical BaTiO3/NiFe2O4 nanocomposite as an efficacious photoanode for photoelectrochemical water splitting
Parangusan, Hemalatha; Bhadra, Jolly; Ahmad, Zubair; Karuppasamy, K.; Mallick, Shoaib; Touati, Farid; Al-Thani, Noora... more authors ... less authors ( 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 ... -
High school students' STEM interests and career aspirations in Qatar: An exploratory study
Abdellatif, Sellami; Santhosh, Malavika; Bhadra, Jolly; Ahmad, Zubair ( Elsevier , 2023 , Article)This study sought to explore high school students' interest in science, technology, engineering, and mathematics (STEM) related disciplines and careers in the context of Qatar. Quantitative data was collected using a survey ... -
High School Students’ Perceptions of the Role of Social Support in Cultivating Their Interests in and Aspirations to STEM Degrees and Careers—A Middle Eastern Case Study
Sellami, Abdellatif; Santhosh, Malavika E.; Siby, Nitha; Bhadra, Jolly; Ahmad, Zubair ( MDPI , 2023 , Article)This case study intends to comprehend students’ perceptions of social support in cultivating their interests and aspirations for science, mathematics, engineering, and technology (STEM) degrees and careers. Survey-based ... -
Innovative tool to educate high school students through research based learning
Al-thani, Noora; Bhadra, Jolly; Siby, Nitha; Elhawary, Enas; Saad, Azza ( Qatar University Press , 2020 , Poster)The need for enhanced engagement of school students for better behavioral outcomes in line with scientific learning and acquisition of science process skills have continually incited educators to strategize innovative ... -
A lightweight neural network with multiscale feature enhancement for liver CT segmentation
Ansari, Mohammed Yusuf; Yang, Yin; Balakrishnan, Shidin; Abinahed, Julien; Al-Ansari, Abdulla; Warfa, Mohamed; Almokdad, Omran; Barah, Ali; Omer, Ahmed; Singh, Ajay Vikram; Meher, Pramod Kumar; Bhadra, Jolly; Halabi, Osama; Azampour, Mohammad Farid; Navab, Nassir; Wendler, Thomas; Dakua, Sarada Prasad... more authors ... less authors ( 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) ... -
Liquid exfoliated MoS2 sheet coupled with conductive polyaniline for gas sensor
parangusan, hemalatha; Bhadra, Jolly; Al-Qudah, Razen; Elgurashi, Hibballa; Abdelhakem, Marwa; Mohaned, Ebtihal... more authors ... less authors ( Qatar University Press , 2021 , Poster)Polyaniline (PANI)/MoS2 composites with porous microspheres were prepared by a hydrothermal and in situ polymerization method. The structural, optical, and morphological properties were characterized by X-ray powder ... -
Long-Term Stability Analysis of 3D and 2D/3D Hybrid Perovskite Solar Cells Using Electrochemical Impedance Spectroscopy
Abdulrahim, Sumayya M.; Ahmad, Zubair; Bhadra, Jolly; Al-Thani, Noora Jabor ( MDPI , 2020 , Article)Despite the remarkable progress in perovskite solar cells (PSCs), their instability and rapid degradation over time still restrict their commercialization. A 2D capping layer has been proved to overcome the stability issues; ... -
Microstructure and mechanical properties of aluminum matrix composites with bimodal-sized hybrid NbC-B4C reinforcements
Aicha S., Lemine; Fayyaz, Osama; Yusuf, Moinuddin; Shakoor, R.A.; Ahmad, Zubair; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( 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 ... -
Numerical modeling and performance optimization of carbon-based hole transport layer free perovskite solar cells
Ehsan, Raza; Ahmad, Zubair; Asif, Muhammad; Aziz, Fakhra; Riaz, Kashif; Mehmood, Muhammad Qasim; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( Elsevier , 2022 , Article)Owing to low production cost and ease of processing, hole-transport layer (HTL) free carbon electrode-based perovskite solar cells (c-PSCs) have emerged as a potential photovoltaic (PV) technology. Despite this, c-PCSs ... -
Numerical simulation analysis towards the effect of charge transport layers electrical properties on cesium based ternary cation perovskite solar cells performance
Ehsan, Raza; Ahmad, Zubair; Aziz, Fakhra; Asif, Muhammad; Ahmed, Ayyaz; Riaz, Kashif; Bhadra, Jolly; Al-Thani, Noora J.... more authors ... less authors ( Elsevier , 2021 , Article)In the present study, the device modeling of inverted architecture based on ITO/HTL/perovskite absorber/ETL/Ag was performed using a one-dimensional solar cell capacitance simulation (SCAPS-1D) program. Initially, device ... -
Optimum sintering method and temperature for cold compact Bismuth Telluride pellets for thermoelectric applications
F. Jaldurgam, Farheen; Ahmad, Zubair; Touati, Farid; Al Ashraf, Abdulla; Shakoor, Abdul; Bhadra, Jolly; J. Al-Thani, Noora; Suk Han, Dong; Altahtamouni, Talal... more authors ... less authors ( Elsevier , 2021 , Article)This work intends to investigate the optimum sintering method and temperature that can improve the efficiency of bismuth telluride cold compact pellets, for the thermoelectric applications. Different p-type and n-type ... -
Piezoelectric Nanogenerators Based On Pvdf-Hfp/Zno Mesoporous Silica Nanocomposites For Self-Powering Devices
Abdul-kareem, Asma Abdulgader; AlSanari, Noura; Daifallah, Amal; Mohamed, Radwa; Bhadra, Jolly; Ponnamma, Deepalekshmi; Al-Thani, Noora... more authors ... less authors ( Qatar University Press , 2020 , Poster)Due to the rising global concern over energy catastrophe and environmental issues, attention has been diverted towards future energy. In recent times, rechargeable power and renewable energy sources have been considered ... -
The Prominent Roles of Undergraduate Mentors in an Online Near-Peer Mentoring Model
Al-Thani, Noora Jabor; Santhosh, Malavika E.; Bhadra, Jolly; Ahmad, Zubair ( MDPI , 2023 , Article)This study exemplifies a STEM-based online near-peer mentoring approach, incorporating 56 students (high and middle school mentees) and 16 secondary undergraduates (UG) mentors. The various constructive roles of UG mentors ... -
Promising transparent and flexible thermoelectric modules based on p-type CuI thin films—A review
Lemine, Aicha S.; Bhadra, Jolly; Al-Thani, Noora J.; Ahmad, Zubair ( 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 ... -
QUYSC STEM Digilearning Model
Siby, Nitha; Elhawary, Enas; Bhadra, Jolly; Al-thani, Noora; Abouhashem, Azza; Magdy, Rana... more authors ... less authors ( Qatar University Press , 2021 , Poster)Covid-19 and the unprecedented shift in educational delivery, has revealed multiple perforations in the science-learning pedagogies. The technological replacements for a physical presence of an instructor and peer collaborated ... -
Removal of Lead Ions from Aqueous Solutions Using Polyaniline Polystyrene Nanocomposites
Bhadra, Jolly; Al-Thani, Noora Jabor; Abul Baker, Abdullah Alashraf ( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Water pollution is an issue of grave importance worldwide, especially in countries that boast of a large number of industries. High concentration of heavy metal ions such as lead, nickel, etc are often found in industrial ... -
The Role of Multidisciplinary Chemistry Informal Research Programs in Building Research Competencies and Attitudes
Al-Thani, Noora J.; Saad, Azza; Siby, Nitha; Bhadra, Jolly; Ahmad, Zubair ( American Chemical Society , 2022 , Article)This article is focused on the effectiveness of an innovative research-based learning model that employs chemistry-based research projects in developing high school students' research competency and attitudes. The ... -
A STEM model to engage students in sustainable science education through sports: A case study in Qatar
Ali, Ruba; Bhadra, Jolly; Siby, Nitha; Ahmad, Zubair; Al-Thani, Noora Jabor ( MDPI , 2021 , Article)Sports has the potential to integrate with different scientific subjects, including materials science and engineering, making it an ideal approach to enhance the students’ affinity toward sustainable education in science, ... -
Study of polyaniline-silver nanocomposite as humidity sensor
Bhadra, Jolly ( 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 ...