This page provides access to research works by Ayu Wazira Azhari, Ts. Dr currently a Deputy Dean (Student & Alumni Affairs) of School of Environmental Engineering, Senior Lecturer, Universiti Malaysia Perlis (UniMAP).

Recent Submissions

  • Synthesis and characterization of self-assembled, high aspect ratio nm-scale columnar silicon structures 

    Ayu Wazira, Azhari; Boon Tong, Goh; Suhaila, Sapeai; Mohd Khairunaz; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
    The aim of this work is to synthesize nm-scale columnar structures in Si principally for solar cell applications. These structures are also desirable as templates for heteroepitaxial growth of SixGe1-x. A nanostructured ...
  • An investigation of crystalline thin-film Six/Ge 1-x/Si solar cells 

    Adnan K Shafeeque, Ali; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
    Thin film solar cells have attracted a lot of attention due to their potential for increased efficiency and reduction in cost of material. Thin-film crystalline silicon solar cells are fundamentally limited in efficiency ...
  • Investigation of XeF2 dry etching for contact isolation of screen printed IBC solar cell 

    Mohd Khairunaz; Suhaila, Sapeai; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
    We demonstrated the use of Xenon Difluoride (XeF2) plasma less vapor etching for isolation of n and p regions in screen-printed interdigitated back contact (IBC) solar cell. The fabrication process is free from lithography ...
  • Land suitability mapping for implementation of precision farming 

    Norasmanizan, Abdullah; Mohd Sabri, Hussin; Ayu Wazira, Azhari; Mahmad Nor, Jaafar (Institute of Electrical and Electronics Engineers Inc., 2011-09)
    This paper studies the potential of satellite imagery in mapping of soil compaction and land suitability using Remote Sensing and GIS method. GIS and remote sensing, play an important role in environmental study, monitoring ...
  • Numerical analysis of bifacial solar cell using PC1D software 

    Suhaila, Sapeai; Mohamad Yusof, Sulaiman; Mohd Khairunaz; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
    Computer-based simulations play a critical role in the design, development, and functionality of solar cells. Device modeling techniques substantially reduce the time and costs through optimization of process steps, choice ...
  • PC1D analysis of thin-film crystalline SixGe1-x/Si solar cells 

    Adnan K Shafeeque, Ali; Ayu Wazira, Azhari; Samir, Ahmad; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2014-10-15)
    Inability to achieve complete optical absorption in thin-film crystalline Si (TF c-Si) solar cells fundamentally limits efficiency. Therefore, materials with high absorption across the entire solar spectrum are highly ...
  • A new approach for predicting solar radiation in tropical environment using satellite images - Case study of Malaysia 

    Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Azami, Zaharim; Mohamad Ahmed, Alghoul (World Scientific and Engineering Academy and Society, 2008-04)
    Satellite images have been indentified as an alternative and accurate method for predicting average annual daily solar radiation of a specific location. These images can be use to predict the performance and sizing of ...
  • Optimization of silver-assisted nano-pillar etching process in silicon 

    Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Mohd Khairunaz, Mat Desa; Saleem Hussain, Zaidi (Elsevier, 2015-12-01)
    In this study, a respond surface methodology (RSM) model is developed using three-level Box-Behnken experimental design (BBD) technique. This model is developed to investigate the influence of metal-assisted chemical etching ...
  • Optical characterization of SixGe1-x films grown on nanostructured Si substrates 

    Ayu Wazira, Azhari; Adnan K Shafeeque, Ali; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi; Uda, Hashim (Institute of Electrical and Electronics Engineers Inc., 2014-10-15)
    High quality Ge and SixGe1-x films grown on Si substrates are attractive for a wide range of applications in optics, optoelectronics, and high efficiency solar cells. In this study, heteroepitaxial growth of Ge on ...
  • Role of micro and nanostructures in enhancing near IR optical absorption in Silicon 

    Cheow Siu, Leong; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2014-10-15)
    Role of micro and nanostructures in enhancing IR transmission in Si wafers has been investigated. Based on feature dimensions, incident light interaction can be described in terms of: (a) geometrical optics for wavelengths ...
  • Heteroepitaxial growth of vacuum-evaporated Si-Ge films on nanostructured silicon substrates 

    Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 2015)
    In this study, a low-cost vacuum-evaporated technique is used in the heteroepitaxial growth of Si-Ge films. Three different surface variations are employed: i.e. polished Si, Si micropyramids and Si nanopillars profiles. ...
  • Organic pollutants removal from diluted palm oil mill effluent (POME) through Sono–Fenton–nZVI process 

    Mohd Raihan, Taha, Prof. Dr.; Abdul Haqi, Ibrahim; Ayu Wazira, Azhari; Mahyun, Ab Wahab (Universiti Malaysia Perlis (UniMAP), 2012-06-18)
    In this study, an advance Fenton process called sono-Fenton-nZVI process was used to remove organics content from palm oil mill effluent (POME). Factors such as pH, sonication intensity and sonication time were studied in ...
  • The potential of satellite images in soil compaction study for implementation of precision agriculture 

    Norasmanizan, Abdullah; Ayu Wazira, Azhari; Mahmad Nor, Jaafar, Assoc. Prof. Dr.; Mohd Sabri, Hussin; Salwa, Mohd Zaini Makhtar (Universiti Malaysia Perlis (UniMAP), 2012-06-18)
    This paper observed the potential of satellite imagery in soil compaction study based on the spectral analysis. The aim of this study is to produce the potential of soil compaction map through the measuring compactness ...
  • Coagulation-flocculation process for leachate treatment using PAC and alum 

    Salwa, Mohd Zaini Makhtar; Mahyun, Ab Wahab; Ayu Wazira, Azhari; Roslaili, Abd Aziz; Mohammad Tamizi, Selimin (Universiti Malaysia Sarawak (UNIMAS)Faculty of Resource Science & Technology, 2009-08-03)
    Sanitary landfill leachate is considered as heavily polluted industrial wastewater, which has extremely high pollution load that may pollute subsoil and ground water. Special attention must be paid for its perfect collection ...
  • Germination of ficus seeds for rehabilitation purposes 

    Ayu Wazira, Azhari; Abdul Haqi, Ibrahim; Ain Nihla, Kamarudzaman (Universiti Sains Malaysia (USM)School of Materials & Mineral Resources Engineering (SMMRE), 2009-06-01)
    Quarrying industries have played an important role in our country for a long time. As the need of quarrying products arises, most companies have been neglecting one of the most important aspects in quarrying, which is the ...
  • Recycling potential of waste materials as fire resistance material 

    Ayu Wazira, Azhari; Abdul Haqi, Ibrahim; Mahyun, Ab Wahab; Salwa, Mohd Zaini Makhtar; Azmil, Mohd Aris (Universiti Teknologi Malaysia (UTM), 2009-06-02)
    In this paper, the possibility of using waste materials as a major component for the manufacturer of thermal insulating elements is was studied. It is believed that the use of fly ash combined together with red gypsum which ...
  • Cloud based models in determination of solar radiation: A review 

    Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Abdul Haqi, Ibrahim (World Scientific and Engineering Academy and Society, 2009-07-01)
    Meteorological data has been used in determining of global and diffuse solar radiation for years. Various methods have been developed and proved to be accurately comparable to the measured value. Among all, the most common ...
  • The utilization of coal fly ash and red gypsum as fire insulation product 

    Ayu Wazira, Azhari; Azmil, Mohd Aris; Abdul Haqi, Ibrahim; Salwa, Mohd Zaini Makhtar; Mahyun, Ab Wahab (Universiti Malaysia Pahang, 2009-06-20)
    In this paper, the thermal, mechanical and optical properties of mortars mainly composed of coal fly ash and red gypsum are studied with the aim of analyzing the fire resistance and mechanical strength characteristics of ...
  • Estimation of solar energy potential in East Malaysia by using Satellite Images 

    Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Abdul Haqi, Ibrahim (Universiti Malaysia Sarawak, 2007-12-27)
    Solar energy has been identified as one of the most potential alternative energy resources as Malaysia receives abundant sunshine all year long. Even though there are many solar instruments that can be used in measuring ...
  • A new approach for predicting solar radiation in tropical environment using satellite images - Case study of Malaysia 

    Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Azami, Zaharim; AL Ghoul, Mohamad (World Scientific and Engineering Academy and Society (WSEAS) Press, 2008)
    Satellite images have been indentified as an alternative and accurate method for predicting average annual daily solar radiation of a specific location. These images can be use to predict the performance and sizing of ...