Properties of CuI nanocrystallites embedded in a glass matrix: From quantum confinement to bulk-band parameters

Abstract

We report the linear absorption spectra of relatively large copper iodide nanocrystals embedded in an alumina borosilicate host network structure. The spectra reveal pronounced exciton lines of both the zinc-blende and the layered hexagonal structures. In the approximation of the weak-confinement regime, the translational masses for the ${Z}_{12}$ and ${Z}_{3}$ excitons, as well as the anisotropy of the ${Z}_{12}\ensuremath{-}\mathrm{exciton}$ band, i.e., the exciton Luttinger parameters, are deduced from the spectral positions of the exciton lines.