Fabrication of CuCl quantum dots and the size dependence of the biexciton binding energy

We fabricated CuCl quantum dots (QDs) in an aluminoborosilicate glass matrix.The photoluminescence of the CuCl QDs was surveyed by using the band-to-band excitation and the site selective luminescence methods, The excitation density dependence of the exciton and the biexciton luminescence was measured, and the saturation effects of the luminescence intensities were observed. The biexciton binding energies measured using the site selective luminescence method increased with decreasing QD size. The data were well fitted by a function resulting from the numerical matrix-diagonalization method.