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Both theoretical calculation and room temperature photoluminescence (PL) measurements were employed to investigate the optical properties of ZnO/Mg 0.9 Zn 0.1 O multi-quantum wells (MQW). Firstly, we calculated the ground state energies of the excitons located in ZnO MQWs through a facile Kronig–Penney model. A clear increase of the excitonic energies was observed with narrowing the...
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