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RISS 인기검색어
- 검색키워드
- 저자 : Faisal Baig (검색결과 6 건)
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Faisal Baig,Yousaf Hameed Khattak,Ahmed Shuja,Kashif Riaz,Bernabé Marí Soucase 한국물리학회 2020 Current Applied Physics Vol.20 No.8
A novel structure is proposed in this work for the efficiency enhancement of experimentally designed Sb2Se3 solar cell by device optimization, the band offset engineering, and Hole Transport Layer (HTL) with the aid of numerical modeling in SCAPS-1D simulator. J− V result of an experimental device was replicated in SCAPS-1D to validate simulated results. After validation of experimental solar cell result, device optimization of Sb2Se3/ZnO/FTO solar cell was performed and after device optimization, power conversion efficiency (PCE) of solar cell jumps from 3.59% to 11.29%. The PCE was further enhanced to value 14.46% by adjusting the band offset between Sb2Se3/ZnO interface. This task was accomplished by introducing Sn doped ZnO layer. Lastly, different HTL layers was applied to Sb2Se3/Zn(Sn, O)/FTO solar cell and among themCZTSe as HTL gave highest values of Fill Factor (FF), PCE, open circuit voltage (VOC) and short circuit current (JSC), 81.18% and 18.50%, 0.66 V and 34.66 mA/cm2.
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Baig, Faisal,Khan, Muhammad Fahad,Beg, Saira 한국정보디스플레이학회 2013 Journal of information display Vol.14 No.4
This paper presents a real-time video-based pointing method that allows the sketching and writing of English text over air in front of a mobile camera. The proposed method has two main tasks. First, it tracks the colored fingertip in the video frames and then applies English optical character reorganization over the plotted images to recognize the written characters. Moreover, the proposed method provides a natural human-system interaction without requiring a keypad, stylus, pen, glove, or any other device for character inputs. For the experiments, an application was developed using OpenCv with the JAVA language. The proposed method was tested on a Samsung Galaxy3 android mobile phone. The proposed algorithm showed an average accuracy rate of 92.083% when tested for different shaped alphabets. Here, more than 3000 different shaped characters were used. The proposed system is a software-based approach and is relevantly very simple, fast, and easy to use. It does not require sensors or any hardware other than a camera and red tape, and is applicable to all disconnected languages. It has one issue, though it is color-sensitive in that the existence of any red-colored object in the background before the start of and during the character writing can lead to false results.
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Faisal Baig,Muhammad Fahad Khan,Saira Beg 한국정보디스플레이학회 2013 Journal of information display Vol.14 No.4
This paper presents a real-time video-based pointing method that allows the sketching and writing of English text over air in front of a mobile camera. The proposed method has two main tasks. First, it tracks the colored fingertip in the video frames and then applies English optical character reorganization over the plotted images to recognize the written characters. Moreover, the proposed method provides a natural human–system interaction without requiring a keypad, stylus, pen, glove,or any other device for character inputs. For the experiments, an application was developed using OpenCv with the JAVA language. The proposed method was tested on a Samsung Galaxy3 android mobile phone. The proposed algorithm showed an average accuracy rate of 92.083% when tested for different shaped alphabets. Here, more than 3000 different shaped characters were used. The proposed system is a software-based approach and is relevantly very simple, fast, and easy to use. It does not require sensors or any hardware other than a camera and red tape, and is applicable to all disconnected languages. It has one issue, though it is color-sensitive in that the existence of any red-colored object in the background before the start of and during the character writing can lead to false results.
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Yousaf Hameed Khattak,Faisal Baig,Hanae Toura,Shafi Ullah,Bernabé Marí,Saira Beg,Hanif Ullah 한국물리학회 2018 Current Applied Physics Vol.18 No.6
Cu2ZnSnS4 (CZTS) is non-toxic earth abundant material and a promising quaternary semiconductor compound of group I-II-IV-VI having kesterite symmetrical structure. Due to its optimum direct band gap, it has been considered suitable material for absorber layer for photovoltaic solar cell applications. This paper presents numerical modeling of experimentally designed CZTS solar cell by applying CZTSe as back surface field (BSF) layer. In this work we reproduced results for experimentally designed CZTS solar cell in SCAPS software. The simulated results are validated and compared with real experimental results. After optimization of cell parameters conversion efficiency of an optimized device is increased up to 6.42% (with CZTS thickness of 0.8 μm). With further optimization and applying CZTSe BSF layer conversion efficiency increased up to 12.92%. Under 1.5 AM illumination condition from the proposed cell promising results had been achieved with short circuit current (Jsc) 27.41 mA/cm2, open circuit voltage (Voc) 744.4mV, fill factor (FF) 63.35% and corresponding to a total area conversion efficiency of 12.92%.
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Hanae Toura,Yousaf Hameed Khattak,Faisal Baig,Bernabe Mari Soucase,Mohamed Ebn Touhami,Bouchaib Hartiti 한국물리학회 2019 Current Applied Physics Vol.19 No.4
Cu2ZnSnS4 kesterite thin films have been electrochemically deposited on indium doped tin oxide (ITO) coated glass substrates from an aqueous electrolyte solution containing CuSo4, ZnSo4, SnSo4 and Na2S2O3 precursors in one step deposition. The purpose of this work is to reduce the cost of fabrication of CZTS thin films with good crystallinity by investigated the effect of complexing agent Na2So4 with Na3C6H5O7 on annealing temperature of CZTS thin film. Based on the results it was found that good crystal structure was achieved at temperature 350 °C, that is below the reported annealing temperature in the literature. The electrodeposition process was maintained at room temperature with a working potential set at −1.05 V vs. Ag/AgCl. The annealed CZTS films were characterized by X-ray diffraction revealed the formation of a crystalline phase CZTS with major and intense peaks. Scanning electron microscopy (SEM) analysis stick to EDS show compact and uniform surface morphology with a spherical crystalline geometry and near stoichiometry metal atomic ratio for the different samples prepared. Atomic force microscopy (AFM) analysis confirms these results. From UV–visible spectroscopy, bandgap of around 1.5 eV was estimated for the kesterite thin films.
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