OPTICAL-PROPERTIES OF AGI QUANTUM DOTS EMBEDDED IN A GLASS MATRIX

We report the fabrication, transmission electron microscopy investigat ion and linear optical properties of silver iodide quantum dots in an aluminaborosilicate host network structure. The nearly spherical quant um dots with radii ranging from 1.7 to 2 nm exhibit a pronounced excit onic absorption and intensive intrinsic photoluminescence in the inter mediate confinement regime. The selective photoluminescence and photol uminescence excitation measurements revealed the fine structure in the spectra due to the splitting of the lowest exciton state by the elect ron-hole exchange interaction. A considerable enhancement of the excha nge energy with decreasing quantum dot size is observed.