PROBLEMS |
REASONS |
QUANTUM DOT GOALS |
|
|
Decreasing of the emission efficiency due to strong effect of piezoelectric fields
|
Spatial separation of electrons and holes due to piezoelectric fields
|
Formation nanoscale QDs with local increase In content
|
|
|
Degradation of optical properties with shift of emission in green optical range |
Necessity to increase In content |
Local areas with large In content
Low average In content
|
|
Reduction of emission efficiency with active region temperature increase
Reduction of LED operating lifetime with current increase |
Thermal evaporation of carriers
Dislocation formation
|
Suppression in-plane transport
|
|
|
Emitting wavelength shift with current density and temperature increase |
Shift of Fermi level
|
Atom-like levels
|
