Browsing by Author "Matin, M. A."

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Deposition of CdS Thin Film by Thermal Evaporation
(Faculty of Electrical and Computer Engineering, CUET, 7-Feb-2019) Dey, Maitry; Das, N. K.; Gupta, A. K. Sen; Dey, Mrinmoy; Hossain, M. S.; Matin, M. A.; Amin, N.
The CdS thin film is widely used for various
Effect of Cd1-xZnxS Window Layer Incorporation in CdTe Solar Cell by Numerical Simulation
(Faculty of Electrical and Computer Engineering, CUET, 7-Feb-2019) Das, N. K.; Sengupta, A. K.; Dey, Mrinmoy; Rahman, K. S.; Matin, M. A.; Amin, N.
CdTe is a very potential binary semiconductor
Electrical Properties of CSS Deposited CdTe Thin Films for Solar Cell Applications
(EWU, 3-May-2019) Das, N. K.; Razi, S. A.; Rahman, K. S.; Matin, M. A.; Amin, N.
CdTe is a very potential absorber material for
Enhancement the Performance of Molybdenum Telluride Solar Cells with Zinc Telluride BSF
(IEEE, 28-Oct-2016) Dey, Mrinmoy; Dey, Maitry; Matin, M. A.; Amin, Nowshad
The binary semiconductor compound Molybdenum telluride (MoTe2) is For high efficiency and better thermal
Influence of CdCl2 Treatment Temperature on Structural and Optical Properties of CdTe Thin Films
(Department of Electrical and Electronics Engineering, IUB, 26-Sep-2019) Razi, S. A.; Das, N. K.; Farhad, S. F. U.; Matin, M. A.
In this work the influence of the CdCl2 treatment temperature on the structural, morphological, and optical properties of CdTe thin films were investigated. The CdTe films were grown on CdS coated borosilicate glass by Close Spaced Sublimation (CSS) technique using a standard recipe. The CdS coating was done by RF sputtering. The deposited CdTe films were treated with aqueous CdCl2 solution of 0.3 M molar concentration at 380°C, 385°C, 390°C, 395°C and 400°C for 25 minutes each. All the treated films show polycrystalline nature with intense peak at (111) orientation. The highest prominent peak and the largest crystallite size were found for 395°C treatment temperature. The SEM study confirms that the film treated at 395°C temperature is compact and shows uniform surface morphology. Sharp transmittance edges are found at 830 nm wavelength for all treated films which also signifies the higher crystallinity, suitable for high performance CdTe solar cell application.
Modeling and Simulation of Highly Efficient Single Junction GaInP Solar Cell
(Department of Electrical and Electronics Engineering, IUB, 26-Sep-2019) Dey, Maitry; Akther, Sarzina; Rumy, Ahmad Ullah; Dey, Mrinmoy; Matin, M. A.; Alam, Mohammad Rafiqul
Gallium Indium Phosphate (GaInP) is III-V semiconductor materials are widely used for the space application and promising material choices for the solar photovoltaic applications owing to its superior optoelectronic properties and very higher performance. The numerical analysis of the single junction GaInP solar cell was carried out by wx-AMPS software to evaluate the cell performance of the proposed cell. The maximum cell conversion efficiency was optimized by the variation of each layer thickness. This research work was done by two steps, firstly the influence the thickness of each layer was investigated for evaluate the cell performance of the single junction GaInP solar cell and secondly the influence of the ZnO layer was analysed by the with and without TCO layer. The possibility of single junction GaInP solar cells was examined and simulated results showed a significant improvement in the higher cell efficiency of 29.47% where Jsc is 24.57 (mA/cm2), Voc is 1.14 V and FF is 0.813 for single junction solar cell. Besides, it was shown a better thermal stability at the gradient of -0.03%/°C, where normalized efficiency of the single junction solar cell was linearly decreased with the increase of operating temperature.
Modeling of Cu2ZnSnS4 Solar Cells with Bismuth Sulphide as a Potential Buffer Layer
(IEEE, 13-May-2016) Dey, Mrinmoy; Dey, Maitry; Biswas, Tama; Alam, Samina; Das, N. K.; Matin, M. A.; Amin, Nowshad
The Cu2ZnSnS4 is a quaternary semiconductor compound has recently been drawn the attention of extensive research as a potential absorber layer since its offers favourable optical and electronic properties along with low cost material. In this research work, the deep level defects on the performance of CZTS solar cells with Bismuth Sulphide (Bi2S3) buffer layer was carried out by numerical analysis using SCAPS 2802 simulator. In the proposed cell, the CZTS absorber layer was reduced that minimized the cost, saving process time and energy required for fabrication. In this study, it was found that the feasibility of this proposed ultra thin CZTS solar cells and showed higher efficiency of 17.89% (Jsc = 31.05 mA/cm2, Voc = 1.03V and FF = 0.562). Moreover, the thermal stability of the CZTS solar cell was examined and found that the normalized efficiency of the proposed cell was linearly decreased with the increased of operating temperature at the gradient of -0.41%/0C.
Performance analysis of ultra wide band indoor channel
(BRAC University, 2008-01) Yasmeen, Kazi Afrina; Wahiduzzaman, A.K.M.; Imtiaz, Ahamed; Matin, M. A.
Research on wireless communication system has been pursued for many years, but there is a renewed interest in ultra-wideband (UWB) technology for communication within short range, because of its huge bandwidth and low radiated power level. This emerging technology provides extremely high data rate in short ranges but in more secured approach. In order to build systems that realize all the potential of UWB, it is first required to understand UWB propagation and the channel properties arise from the propagation. In this research, the properties of UWB channel for indoor industrial environment was evaluated. A few indoor channel models have been studied so far for different environments but not for indoor industrial environment and various data rates are obtained according to wireless channel environments. Therefore, an accurate channel model is required to determine the maximum achievable data rate. In this thesis, we have proposed a channel model for indoor industrial environment considering the scattering coefficient along with the other multipath gain coefficient. This thesis addresses scattering effect while modeling UWB channel. Here, the performance of UWB channel model is analyzed following the parameters, such as power delay profile and the temporal dispersion properties which are also investigated in this paper.
Structural properties of bi-layer Molybdenum Thin-film deposited by RF magnetron sputtering for CZTS solar cells
(Department of Electrical and Electronics Engineering, IUB, 26-Sep-2019) Gupta, A.K.S.; Ahamed, E.M.K.I.; Quamruzzaman, M.; Matin, M. A.; Rahaman, K.S.; Amin, N.
CZTS (Copper Zinc Tin Sulfide) is a propitious absorber material for photovoltaic applications and gaining popularity for its material abundances and non-toxicity. In order to get good adhesion with substrate and at the same time low film resistivity, bi-layer Molybdenum (Mo) thin-films are frequently used as back electrode in substrate-structured CZTS based Thin film Solar Cells (TFSCs). In a bi-layer structured Mo film, usually a thin high-pressure (HP) bottom layer serves to give better adhesion and a thick low-pressure (LP) top layer shown lower film resistivity. In this work, structural study of two different stacks (total 1µm film thickness) of HP layer and LP layer for both as deposited and Vacuum Thermal Annealing (VTA) @560°Cfor 45 minutes were performed. Crystals were more oriented along [200] plane instead of [110] plane and oxidation at the Mo surface were observed for thicker bottom layer. It has been found that, for thinner bottom layer, not only increased crystallite size (from 19.27 nm to 21.26 nm for as-deposited and VTA treated case respectively), but also compressive stressed Mo films were found. It is evident that this bi-layer Mo thin-film is suitable for CZTS solar cell fabrication.