Magneto-absorption in conical quantum dot ensemble: Possible applications for QD LED

In the framework of the adiabatic approximation, the energy states of electron, as well as the direct light absorption are investigated in conical quantum dot under the external magnetic field. Analytical expressions for the particle wave function and energy spectrum are obtained. The dependence of the absorption edge on the geometrical parameters of conical quantum dot is obtained. Selection rules are revealed for transitions between levels with different quantum numbers. Absorption coefficient dependence on the frequency of the incident light is revealed taking into account dispersion of conical quantum dot's base radius for both cases of symmetric and asymmetric distribution functions. Such structures are very promising and can be used for the element base quantum dots LEDs. •Analytical expressions for the electron energy spectrum and wave function of conical quantum dot under the external magnetic field are obtained.•The dependence of the magneto-absorption edge on the magnetic field intensity and geometrical parameters of conical quantum dot is obtained.•The selection rules for transitions between levels with different quantum numbers are revealed.•The possibility of the application of conical quantum dots in the preparation of RGB LED devices on quantum dots by means of variation of the geometrical parameters of cone is shown.