Browsing by Author "Nekovei, Reza"

Now showing items 1-8 of 8

    • Effect of the length of silicon nano-dot/wire on band gap 

      Hassan, Walid M.I.; Verma, Amit; Nekovei, Reza; Khader, Mahmoud M.; Anantram, M. P. ( Institute of Electrical and Electronics Engineers Inc. (IEEE) , 2014 , Conference Paper)
      We will report on the role of the length of silicon nanowire (SNW) in determining the band gap of a structure. We find that the band gap decreases with SNW length for the same diameter and approaches the band gap for an ...

    • High-efficiency c-Si based interdigitated point contact back heterojunction solar cells 

      Jeyakumar, R.; Maiti, T. K.; Khader, Mahmoud M.; Kandasamy, Nikesh; Verma, Amit; ... more authors ( Springer New York LLC , 2017 , Article)
      We report on the modeling and performance optimization studies of point contact back heterojunction (BHJ) solar cells. BHJ solar cell technology is a combination of front heterojunction (a-Si:H/c-Si) solar cell technology ...

    • Oxygen passivation as effective technique for tailoring the nature of band gap of silicon nanowires 

      Hassan, Walid M.I.; Khader, Mahmoud M.; Verma, Amit; Nekovei, Reza; Anantram, M. P. ( Institute of Electrical and Electronics Engineers Inc. (IEEE) , 2015 , Conference Paper)
      Silicon nanowires have been subjected to several experiential and theoretical studies, including chemical tuning with different substituents aiming to tailor the band gap as well as increasing optical absorption efficiency ...

    • Photoresponse of silicon with asymmetric area contacts 

      Rabbani, M. Golam; Sundararajan, Jency P.; Verma, Amit; Nekovei, Reza; Khader, Mahmoud M.; ... more authors ( Institute of Physics Publishing , 2016 , Article)
      We report on high performance metal-semiconductor-metal (MSM) photosensors based on asymmetric metal pad areas. The reported devices require a single-step metal deposition, and exhibit large photo response even under ...

    • Simulation study of Schottky contact based single Si wire solar cell 

      Rabbani, M. Golam; Verma, Amit; Nekovei, Reza; Khader, Mahmoud M; Anantram, M.P. ( IEEE , 2014 , Conference Paper)
      We model single silicon nanowire (SiNW) solar cells with dissimilar work function metal contacts. Both short circuit current (ISC) and open circuit voltage (VOC) have been investigated. Effects of nanowire dimension, ...

    • TDDFT Investigation of the hybrid organic inorganic perovskite: CH 3 NH 3 PbC 3 

      Alwarappan, Ganesh; Padmanabachary, Aashik; Alam, Md Raiyan; Bhandari, Aashka; Patil, Sunil; ... more authors ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)
      Hybrid organic-inorganic metal perovskites (chemical formula: ABX3, A-organic cation, B-metal ion, X-halide) are the latest advancement for increasing efficiency in thin-film solar cells or Dye Solar Cells (DSC). They have ...

    • Theoretical investigation of the oxygen bond dissociation energies in graphene oxide 

      Hassan, Walid M.I.; Verma, Amit; Nekovei, Reza; Jeyakumar, R.; Khader, Mahmoud M. ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)
      The theoretical vibrational spectrum, oxygen bond dissociation energies (BDE), atomic charges and hydrogen bonding has been investigated using wB97XD/6-31g(d) method of calculation. The order of BDE for C-O comes in the ...

    • Zero-bias photocurrents in highly-disordered networks of Ge and Si nanowires 

      Rabbani, M. Golam; Patil, Sunil R.; Verma, Amit; Villarreal, Julian E.; Korgel, Brian A.; ... more authors ( Institute of Physics Publishing , 2015 , Article)
      Semiconducting nanowire (NW) devices have garnered attention in self-powered electronic and optoelectronic applications. This work explores and exhibits, for the first time for visible light, clear evidence of the zero-biased ...