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      https://www.ias.ac.in/article/fulltext/pram/086/03/0637-0651

    • Keywords

       

      Keldysh nonequilibrium Green’s function method; nanowire; temperature dependence; photoinduced current; light emission.

    • Abstract

       

      In this paper, we present a theoretical study on a light emitting and current carrying nanosystem, in the nonzero temperature regime. The system under consideration is a semiconducting nanowire sandwiched between two semi-infinite metallic electrodes. The study was performed using the Keldysh nonequilibrium Green’s function method. We systematically investigate the photoinduced current and the light emission induced by this electronic current in the presence of gate voltage. The temperature dependence of these processes are also investigated in the temperature range of 3–300 K. Our study shows that, the photoinduced current is due to the transfer of electrons from highest occupied molecular orbital (HOMO) to the lowest unoccupied molecularorbital (LUMO). Thus, the separation of electron from the electron–hole pair creates a free electron which is responsible for the observed photoinduced current. The same conclusion is also arrived at for the reverse process of light emission under the influence of the electronic current.

    • Author Affiliations

       

      Darehdor Mahvash Arabi1 Shahtahmassebi Nasser1

      1. Department of Physics and Nanocentre Research, Ferdowsi University of Mashhad, Mashhad, Iran
    • Dates

       
  • Pramana – Journal of Physics | News

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