Le Journal de Physique IV 03 (1993) C5-421-C5-424
Optical properties of ZnSe-ZnTe type II superlatticesT. CLOITRE, N. BRIOT, O. BRIOT, P. BORING, B. GIL and R.L. AULOMBARD
Université Montpellier II, Sciences et Techniques du Languedoc, Groupe d'Etudes des Semiconducteurs, case courrier 074, place E. Bataillon, 34095 Montpellier cedex 5, France
In this communication we show that the cancelation of excitonic effects by photo-injected carriers can be easily produced in ZnSe-ZnTe superlattices. This combination is interesting : it has a type II band alignment in real space. Strong confinements of electrons and holes by large bands offsets lead to important values of Rydberg energies ; thus, important energy-shifts of some 20 meV are measured when exciton screening is produced in such superlattices.
© EDP Sciences 1993