Browsing by Author "Matin, M.A."

Filter results by typing the first few letters
Now showing 1 - 5 of 5
  • Thumbnail Image
    Item
  • Thumbnail Image
    Item
    A Highly Efficient InGaN Single Junction Solar Cell Using MATLab
    (IEEE, 28-Oct-2016) Akter, Nargis; Sharmin, Sanjida; Afrose, Rahima; Matin, M.A.; Amin, N.
    Though the expenditure of world energy is increasing exponentially, it is obvious that a solution of renewable energy must be utilized. In order to fulfill the energy demand of the mankind, utilization of the huge energy of the sun by transforming it into electricity is an emerging alternative way. Recently developed InGaN is a direct band gap solar photovoltaic material that has an amazing tunable band gap of 0.7 eV to 3.4 eV and a high optical absorption coefficient over 105 /cm. In this paper, numerical simulations has been done using MATLab to explore the unknown potential of this promising material to design a high performance InGaN solar cell.All the required parameters for simulation were determined from the theory, literature and in some cases reasonable estimation. This simulation were done with different ratio of In and Ga content for the single junction solar cell and found a high conversion efficiency of 27.3% with this InGaN compound material.
  • Thumbnail Image
    Item
    An Efficient CZTS Solar Cell from Numerical Analysis
    (EWU, 3-May-2019) Ahamed, E.M.K. Ikball; Gupta, A.K. Sen; Qamruzzaman, M.; Matin, M.A.
    The Copper Zinc Tin Sulfide (CZTS) is
  • Thumbnail Image
    Item
    Structural Properties of CdS Thin-films Deposited by RF Magnetron Sputtering
    (Department of Electrical and Electronics Engineering, IUB, 26-Sep-2019) Ahamed, E.M.K. Ikball; Gupta, A.K.S.; Khan, M.N.I.; Matin, M.A.; Amin, N.
    Cadmium Sulfide (CdS) thin-films were deposited by RF magnetron sputtering at different RF power ambient and their structural properties were studied to observe the effect of different sputtering conditions on the structural properties of CdS films. CdS is widely used buffer layer for chalcopyrite based photovoltaic cells and requires good crystalline property and less dislocation density as well as strain in conjunction with a thinner layer ensures good crystalline quality. The as deposited films were characterized by X-ray diffraction and the structural properties (crystal type, lattice alignment, lattice constant, crystalline size, microstrain, dislocation density, etc.) were analyzed. Analysis on structural properties shows that crystallite size increases and crystalline quality enhanced with higher RF power, while the dislocation density and developed strain declined for the same conditions. This investigation concluded that higher RF power sputtered CdS thin-films for lower time deposition can be more suitable for thin-film photovoltaic cell applications.
  • No Thumbnail Available
    Item
    The significance of bilayer window (CdS:O/CdS) on the performance of CdTe thin film solar cells
    (Elsevier, 2024-09) Das, N.K.; Farhad, S.F.U.; Gupta, A.K. Sen; Ahamed, E.M.K. Ikball; Matin, M.A.; Amin, N.
    Ultrathin and compact CdS:O/CdS bilayer window in CdTe solar cells has higher potential for enhanced p-type doping, reduced Te diffusion, and improved power conversion efficiency (PCE) compared to traditional single-layer CdS or CdS:O windows. In this effort, we used a two-gun RF sputtering equipment to deposit compact CdS:O (∼50 nm)/CdS(∼50 nm) bilayers onto the borosilicate and ITO-coated glass substrates at low temperature (≤250 °C). Intriguingly CdS:O/CdS bilayers retain its hexagonal {0002} preferential orientation but with around 10.58 % optical bandgap (Eg) increment compared to CdS (Eg ≈ 2.32 eV) of equal thickness (∼100 nm). Close-spaced sublimation (CSS) technique was used to deposit the CdTe thin film onto the CdS and CdS:O/CdS layers at 650 °C. The effect of CdS and CdS:O/CdS layers on the microstructural and morphological features of CdCl2-treated CdTe films were critically analyzed in revealing a promising {0001}/{111}-like partial-epitaxy presumably due to the preferential cubic CdTe growth along the <111> orientation. The CdTe films grown over a CdS:O/CdS layer exhibited smaller average crystallite and grain sizes than those grown over a single CdS layer. An essential finding was the formation of an optimal intermix layer of CdSxTe1-x, particularly evident in the CdTe films grown on the CdS:O/CdS bilayer. To comprehensively explore the effect of CdS:O/CdS window layers on PCE, complete CdTe solar cells were fabricated using three different window layers: CdS, CdS:O, and CdS:O/CdS, which are all considered as rudimentary as no layer optimization was performed. Notably, CdTe solar cell that incorporates the CdS:O/CdS bilayer window exhibited the most promising performance among all the tested rudimentary cells and corroborated the numerically simulated findings conducted by the SCAPS-1D simulator.