Nonuniform carrier trapping among quantum dots
Resource
Nanotechnology, 2005. 5th IEEE Conference on
Journal
2005 5th IEEE Conference on Nanotechnology
Journal Volume
1
Pages
507-510
Date Issued
2005
Author(s)
Abstract
In quantum-dot (QD) structures, carriers do not distribute uniformly among QDs. Carriers tend to distribute at larger QDs. Combined with state filling effect, carrier will populate larger QDs first. Then, carrier will populate smaller QDs at higher injection density. The nonuniform carrier distribution also leads to the separation of two emission peaks with increasing current. On the fabricated devices, the photon energy difference between the two peaks increased from 70.8 meV at 60 mA to 78 meV at 160 mA. By observing the peak separation, the tendency of carrier distribution can be identified.
SDGs
Type
conference paper
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