• 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 ...
    • Modeling of dual-metal Schottky contacts based silicon micro and nano wire solar cells 

      Rabbani, M. Golam; Verma, Amit; Adachi, Michael M.; Sundararajan, Jency P.; Khader, Mahmoud M.; ... more authors ( Elsevier B.V. , 2014 , Article)
      We study solar cell properties of single silicon wires connected at their ends to two dissimilar metals of different work functions. Effects of wire dimensions, the work functions of the metals, and minority carrier lifetimes ...
    • Photoconductive response of strained silicon nanowires: A Monte Carlo study 

      Shiri, Daryoush; Verma, Amit; Khader, Mahmoud M. ( AIP Publishing LLC. , 2014 , Article)
      Using Ensemble Monte Carlo simulations, the photocurrent in a 500 nm long strained [110] silicon nanowire with diameter of 3.1 nm is investigated. It was observed that a phototransistor based on this nanowire can have ...
    • 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, ...
    • Tailoring optical absorption in silicon nanostructures from UV to visible light: A TDDFT study 

      Hassan, Walid M.I.; Anantram, M.P.; Nekovei, Reza; Khader, Mahmoud M.; Verma, Amit ( Elsevier Ltd , 2016 , Article)
      The utilization of silicon nanostructures, from quantum dots to nanowires, for photovoltaic applications depends on understanding the effect of their physical structure on their optical absorption properties. In this work, ...
    • 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 ...
    • TDDFT Studies on sheet size-dependency of optoelectronic properties of 2d silicon 

      Alam, MD Raiyan; Alwarappan, Ganesh; Bhandari, Aashka; Patil, Sunil; Alfalah, Sherin; ... more authors ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)
      Silicene, a two-dimensional (2D) silicon nanosheet, has gained immense interest due to potential applications, better compatibility, and expected integration with current silicon (Si) technology. This work explores the ...
    • 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 ...