We report on magneto-optical studies of ZnSe/(Zn,Mg)(S,Se) quantum wells wi
th n-type modulation doping. Negatively charged excitons related to the hea
vy-hole and light-hole exciton states are found and identified by their pol
arization properties. Exciton and trion parameters (radiative and nonradiat
ive damping) are determined. Dynamics of charged excitons is studied by tim
e-resolved photoluminescence in magnetic fields up to 10 T.