Turkish Journal
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Turkish Journal of Physics
The influence of confinements on the photon flux spectra in amorphous silicon quantum dotsShatha Mohammad ABDUL-HAKEEM2
1Theoretical Nanoscience of Optoelectronic Devices Group, Department of Physics,
College of Education (Ibn Al-Haitham), University of Baghdad, Adamiayh, Baghdad-IRAQ
e-mails: moafak@uobaghdad.edu.iq and moafak@uob.edu.iq
2Department of Physics, College of Science, University of Baghdad, Baghdad-IRAQ
Abstract: We have theoretically calculated the photon flux of radiative recombination in amorphous silicon quantum dots (a-SiQDs) at room temperature. These quantum dots have been ranged in their diameter 1 to 4 nm. The convolution of probability density function of deepest energy states of conduction PC(E) and valence PV(E) bands within the capture volume was adopted. The behavior of this function can be classified into four regions according to the quantum dot size. The effect of spatial and quantum confinements on the peak value of photon flux must be taken into account. We found that a blue shift is classified by the quantum confinement effect on the photon flux value, while a red shift appeared via the spatial confinement effect.
Key Words: Nanoscience, quantum dots, photon flux, quantum confinement
Turk. J. Phys., 36, (2012), 197-205.
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Other articles published in the same issue: Turk. J. Phys.,vol.36,iss.2.