Quantum-size stark effect in semiconductor microcrystals

Abstract The effect of an external electric field on the absorption spectrum of CdS and CdSe microcrystals has been investigated both experimentally and theoretically. It is found that electro-optic properties of the microcrystal doped glasses near the interband edge are governed by the quadratic Stark effect. The value of the Stark shift was observed to decrease in small size microcrystals as the cube of the radius. This dependence is in good agreement with the theoretical considerations taking into account the peculiarities of the size confined electron-hole pair energy spectra.