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oe1(光电查) - 科学论文

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  • Effect of Doping on the Luminescent Properties of LED Heterostructures with Quantum Wells

    摘要： It is established that the model of interband radiative recombination in a semiconductor under bipolar injection of charge carriers, in which the recombination rate is described by the product of the total charge carrier concentrations, does not take into account the imbalance in the concentrations of recombining particles physically existing during doping. To calculate the number of electron-hole pair recombination events taking into account the difference in the concentrations of recombining particles, it is proposed to use the calculation of the reciprocal sum of the reciprocal concentrations using the participation functions. It is shown that at such a description of the number of recombination events, an increase in the doping impurity concentration reduces the number of events, but leaves the radiative recombination time unchanged at any injection level.

    关键词： emission of radiation,radiative recombination rate,participation functions

    更新于2025-09-23 15:21:01

  • Model for electroluminescence in single-walled carbon nanotube field effect transistor under transverse magnetic field

    摘要： Electroluminescence spectrum and radiative recombination rate of short channel single-walled carbon nanotube field effect transistor in presence of transverse magnetic field is calculated by using non-equilibrium Green’s function method. Significant enhancement in radiative recombination rate and red shift in electroluminescence spectrum are observed with increase in the strength of magnetic field. The band gap suppression estimated from energy position resolved local density of states calculation plays a dominant role in transport mechanism under the influence of external magnetic field. The tuning of electroluminescence spectrum of single-walled carbon nanotube by transverse magnetic field can be employed as nanoscale optical source in next generation optoelectronic and photonic devices.

    关键词： electroluminescence,single-walled carbon nanotube,optoelectronics,radiative recombination rate,plasmonics,field effect transistor

    更新于2025-09-16 10:30:52