Browsing Ayu Wazira Azhari, Ts. Dr by Author "Saleem Hussain, Zaidi"

Now showing items 1-9 of 9

    • 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. ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...