Determination of size and composition of optically active CdZnSe/ZnBeSe quantum dots

The size and composition of optically active CdxZn1−xSe/Zn0.97Be0.03Se quantum dots (QDs) are determined using photoluminescence, photoluminescence excitation, and Raman scattering spectroscopies combined with a model of photoluminescence and LO phonon energies. The diameters of optically active QDs range from 5.1 to 8.0 nm with Cd composition in the range of 47%–54%, corresponding to the “small” QDs group. Additionally, surface phonons from QDs are observed in this system.