Current Density-Voltage-Luminescence (j-V-L) and Lifetime (L-t). j-V-L and L-t curves were recorded with a Keithley 2612B source meter unit (SMU) at rates of 1V/s. A photodiode of known diameter at known distance was used for luminance detection. Angular dependent electroluminesce spectra were taken with a Phelos instrument (Fluxim AG, Switzerland). Using a Lambertian approximation, the EQE was determined. The validity of the EQE values was verified within a relative error of 10 % by random sampling with a calibrated integrating sphere. , and the permittivity. The confinement energy of a nanocrystal is primarily determined by its size and the reduced mass of its constituent particles. This energy can be estimated using the 3-D particle in a box model, which is a widely used framework in quantum physics textbooks: