Abstract
We report on the binding energy of a charged exciton (trion) confined in a single, epitaxially grown 1.7 nm thick ZnO/(Zn,Mg)O quantum well as large as 22 meV or 27.6 meV when determined in micro-photoluminescence or transmission measurements, respectively. Charged exciton emission is found to persist up to near room temperature. The binding energy comparable to thermal energy at room temperature is promising for trion based spintronic and optoelectronic applications.
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