Absorption and luminescence of the quantum wells formed by the (Zn-Cd)Se an
d (Ga-In)As solid solutions are studied in the range of exciton size-quanti
zation ground state. The spectra observed are described by a model assuming
the two-dimensional character of fluctuation states in quantum wells and t
he presence of a percolation threshold within the absorption contour. (C) 2
000 MAIK "Nauka/ Interperiodica".