Evidence of exciton complexes in non polar ZnO (Zn, Mg) O A-plane quantum well.

Description

Excitons complexes in ZnO/(Zn, Mg)O non-polar quantum well have been studied by usingcontinuous-wave photoluminescence according to temperature and to the density of excitation.The spectrum of photoluminescence of the quantum well consists of three different lines. Theratio between the intensities of these lines depends of the temperature but also of the density ofexcitation. The lines are attributed to the free exciton, the negatively charged trion and thebiexciton. The binding energy of trion and biexciton are found to be respectively 19.5 ± 2 meVand 45 ± 5 meV.

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