PHOTOLUMINESCENCE OF POROUS SILICON WITH INSERTED CdSe/ZnS QUANTUM DOTS

Combining basic materials, such as porous silicon, with nanoparticles we can produce low-cost light emitting materials, what is economically useful and important nowadays. In this work we have produced visible light emitting quantum dots (QD) of CdSe/ZnS and precipitated them onto the surface of porous silicon structure. The porous silicon (PS) structures were prepared by chemical etching at room temperature in HF:HNO3 solution. The structures of PS-QD were investigated by SEM and UV-VIS spectroscopy. Absorption and photoluminescence of the structures, dependent on excitation wavelength, were measured in the visible spectral region.