Zaliman Sauli
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Preferred name
Zaliman Sauli
Official Name
Zaliman, Sauli
Alternative Name
Sauli, Zaliman B.
Sauli, Zaliman
Sauli, Z.
Main Affiliation
Scopus Author ID
24554644300
Researcher ID
FWC-2779-2022

Research Output

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  • Publication
    The influence of selenium amount added into the graphite box during the selenization of solution deposited CIGSe thin films.
    ( 2021)
    G M Albalawneh
    ;
    M M Ramli
    ;
    M ZM Zain
    ;
    Zaliman Sauli
    AbstractCu(In,Ga)Se2 (CIGSe) semiconductor is an efficient light absorber material for thin-film solar cell technology. The sequential evaporation of precursor solution, followed by the selenization process, is a promising non-vacuum and low-cost approach for CIGSe thin-film fabrication. The main properties of CIGSe thin films are strongly affected by the post-selenization step. Hence, thorough control of selenization parameters is essential for achieving pure crystalline, large grain films needed for high-performance solar cell devices. In this study, the impact of selenium (Se) amount added during the selenization step was evaluated. The structural, morphological, and compositional properties of the selenized thin films were investigated. The CIGSe precursor film was deposited by a spin-coating technique using a thiol/amine-based solution, followed by annealing with different Se amounts (100, 200, and 300 mg) within a partially closed small round graphite container. In all cases, uniform films of 1.2–1.5 µm thickness with a well-defined single chalcopyrite phase were obtained. It was observed that the grain size and Se content increased with increasing Se mass added. Moreover, the sample selenized with 200 mg Se resulted in higher surface coverage, thinner fine-grained layer, and less MoSe2 formation than the excess Se samples.
  • Publication
    Kinetics, mass transport characteristics, and structural changes during air-drying of purple yam (Dioscorea Alata L.) at different process conditions
    ( 2017)
    Flordeliza C. De Vera
    ;
    Leif Anthony B. Comaling
    ;
    Iya Ray Alyanna M. Lao
    ;
    Alvin R. Caparanga
    ;
    Zaliman Sauli
    This experiment was designed to follow the 2k factorial design to study the effects of the three drying parameters on the drying characteristics and effective moisture diffusivity and to fit each run performed on the best thin-layer drying kinetics model. Raw purple yam samples were pre-treated and undergone the designed drying procedures at which the weight of the samples were recorded every minute until such time that the sample weights become constant. Scanning Electron Microscopy (SEM) is utilized for qualitative analysis of the dried samples. The number of pores per unit area and the overall aesthetics of the surface of the dried samples were compared also using SEM. Considering the qualitative analysis conducted on the samples from the images of SEM, dried samples from run 2 has the most desirable conditions such as high temperature and low air velocity for drying because the samples from this run have large pore diameters with minimal cell breakages.
  • Publication
    Thermosonic vs thermocompression flip chip bonding for low cost system in package
    ( 2018)
    M. R. Lim
    ;
    Zaliman Sauli
    ;
    Hanizah Aris
    ;
    V. Retnasamy
    ;
    Edward W.C.L.
    ;
    K. Muniandy
    ;
    N. Khan
    ;
    C. S. Foong
  • Publication
    The design and analysis of high Q factor film bulk acoustic wave resonator for filter in super high frequency
    ( 2021-12)
    Nurul Izza Mohd Nor
    ;
    Nazuhusna Khalid
    ;
    Nur Anira Asyikin Hashim
    ;
    Shahrir Rizal Kasjoo
    ;
    Zaliman Sauli
    ;
    Lam Hok Lang
    ;
    Chow Shi Qi
    Filtering process is one of the highlighted issues when the operating frequency is up to medium or high GHz range in wireless transceiver system. The development of high performance, small size, filter on chip operating in GHz frequency range is the requirement of present and future wireless transceiver systems. The conventional frequency bands, below 6 GHz are already congested, thus, to satisfy this demand, the research into transceiver systems working at frequencies higher than 6 GHz has been growing. Therefore, this work proposed the design and optimization of film bulk acoustic wave resonator (FBAR) operating in frequency 7 GHz to 10 GHz with high quality (Q) factor. The effect of using different geometrical parameters to achieve high Q factor FBAR in these frequency bands is analysed. The designed FBAR achieved Q factor of 1767 at 7 GHz and 1237 at 10 GHz by using aluminium nitride as the piezoelectric thin film and molybdenum as the electrode.
  • Publication
    Kinetics, mass transport characteristics, and structural changes during air-drying of purple yam (Dioscorea Alata L.) at different process conditions
    ( 2017)
    Flordeliza C. De Vera
    ;
    Leif Anthony B. Comaling
    ;
    Iya Ray Alyanna M. Lao
    ;
    Alvin R. Caparanga
    ;
    Zaliman Sauli
    This experiment was designed to follow the 2k factorial design to study the effects of the three drying parameters on the drying characteristics and effective moisture diffusivity and to fit each run performed on the best thin-layer drying kinetics model. Raw purple yam samples were pre-treated and undergone the designed drying procedures at which the weight of the samples were recorded every minute until such time that the sample weights become constant. Scanning Electron Microscopy (SEM) is utilized for qualitative analysis of the dried samples. The number of pores per unit area and the overall aesthetics of the surface of the dried samples were compared also using SEM. Considering the qualitative analysis conducted on the samples from the images of SEM, dried samples from run 2 has the most desirable conditions such as high temperature and low air velocity for drying because the samples from this run have large pore diameters with minimal cell breakages.
  • Publication
    Extraction, preparation and application of anthocyanin pigments from mulberry using polar solvent in various pH as photosensitizer for dye-sensitized solar cells
    ( 2021-12)
    Suriati Suhaimi
    ;
    Nur Syakimah Ismail
    ;
    Zaliman Sauli
    The purpose of this study is to evaluate the effect of polar solvent acetone and ethanol towards Morus nigra L. (Mulberry) anthocyanin dye extraction and suitable solvent sensitization of the same extracted dye on mesoporous titanium dioxide (TiO2) for dye-sensitized solar cells (DSSCs) applications. Polar extraction solvent, namely acetone, ethanol and combination of polar protic and polar aprotic solvent of acetone and ethanol which containing of 0.5% and 1% hydrochloric acid (HCl) were employed to extract anthocyanin natural dye from Mulberry. The dye extraction effectiveness and dye active component was analysed using-ultraviolet-visible spectroscopy and fourier transform infrared. Then, the extracted dye sensitization over TiO2 was monitored with current-voltage characteristic to obtain the cell power conversion efficiency. The DSSCs equipped with Mulberry extraction achieved the conversion efficiency in ranged of 0.0003% to 0.30%. Open circuit voltage and current densities obtained ranged from 0.024 to 0.574 V and 0.0023 to 0.352 mAcm-2. The performance of the fabricated cells was investigated at various pH values in presence of acidic environment in Mulberry dye extractions. This work provide an insight into the importance of choosing a right medium for photosensitizer as well as the favourable solvent for mulberry anthocyanin dye adsorption on TiO2 photoanode.
  • Publication
    Simulation of The Impact of Bulk Selenium Composition Variation in CIGSSe Solar Cell
    ( 2022)
    G.M. Albalawneh
    ;
    M.M. Ramli
    ;
    M.Z.M. Zain
    ;
    Zaliman Sauli
    ;
    M. Nabiałek
    ;
    K. Jeż
  • Publication
    Development of copper busbar by silver plating under non-linear load operation using finite element method (FEM)
    (AIP Publishing, 2023-04)
    Muhammad Hafiz Ab Aziz
    ;
    Muhammad Mokhzaini Azizan
    ;
    Zaliman Sauli
    ;
    Mohd Wafiuddin Yahya
    Generally, busbars are used in electrical transmission and distribution power. The presence of harmonic current in the busbar will generate more heat to the system. The generation of heat will be increasing power losses at the busbar and reduced their conductivity. A three-dimensional (3D) Finite Element Method (FEM) by COMSOL Multiphysics software was used in this research to analyze the heat distribution, average temperature, and power losses of copper busbar with 0.5 mm silver plating on their surface. The dimension of 30 mm × 4 mm × 500 mm copper busbar was utilized based on their suitable current carrying capacity from the measured location. The current source starts from 419 A and varies from 0% until 50% of Total Harmonic Distortion (THD) with an interval of 5%. The findings show improvement condition of copper busbar after silver plated on their surface. The bare copper busbar only meets the requirement range condition of BS159:1992 until the existence of 15% Total Harmonic Distortion of current (THDi) component while silver-plated copper complies until the maximum value of THDi which is 50%.
  • Publication
    Simulation and Investigation of Si-Based Piezoelectric Micromachined Ultrasonic Transducer (PMUT) Performances
    ( 2023-07-01)
    Hasnizah Aris
    ;
    Rosli M.N.B.
    ;
    Mohammad Nuzaihan Md Nor
    ;
    Zaliman Sauli
    ;
    Norhaimi W.M.W.
    Micro-electromechanical system (MEMS) based piezoelectric ultrasonic transducers for acoustic imaging of the surroundings are known as piezoelectric micromachined ultrasonic transducers (PMUTs). This research proposes a structural design of the PMUT with four fixed-guided beams. The beam is subjected to lateral loads, with vectors that are perpendicular to the longitudinal axis. This project simulated Piezoelectric Micromachined Ultrasonic Transducer (PMUT) with three different material properties i.e. Aluminium Nitride (AlN), Lead zirconate titanate (PZT) and Zinc Oxide (ZnO). Based on the study, it was found that reducing the beam dimensions and increasing the plate size will result in the first mode frequency reduction from 1.33x107 Hz to 3.74x106 Hz. Other than that, it was found that AlN PMUT experienced the maximum deflection of 6.3413 to 6.3478 µm when the loads applied in the range of 50 to 200 µN/m2. When the piezoelectric material changed to PZT, we obtained the maximum deflections of 0.3771 to 0.3786 µm when the same loads range applied to the PMUT. As for the ZnO PMUT, the maximum deflections obtained were in between 0.1702 µm to 0.1772 µm with the loads are maintained as in the loads applied to the AlN and PZT. This study proved the significant impact of altering the structural dimensions and material properties of PMUTs on their operational characteristics, specifically the first mode frequency and deflection behavior.
      1
  • Publication
    Simulation and investigation of high-frequency Si-based piezoelectric micromachined ultrasonic transducer (PMUT) performances
    ( 2024-02-08)
    Hasnizah Aris
    ;
    Kaharuddin N.A.A.
    ;
    Zaliman Sauli
    ;
    Aziz A.A.
    ;
    Wan Mokhdzani Wan Nor Haimi
    The application of ultrasonic transducers is relying on the frequency which the transducers resonated. In the imaging application, an ultrasonic transducer should possess resonant frequency that higher than 2 MHz while in ultrasound testing, a range of 2 to 10 MHz is seeming to be adequate. This report is investigating the performance of high frequency Si-based PMUT with different piezoelectric material used in the structure. The piezoelectric materials used are Aluminium Nitride (AlN), Lead Zirconate Titanate (PZT), and Zinc Oxide (ZnO). Using the same dimensions, the obtained resonant frequencies of PMUT are 4.0370 MHz, 2.8224 MHz, and 3.4358 MHz for AlN, PZT and ZnO respectively.
      4  23