A UV-emitting diode composed of a hetero-SrCu2O2/ZnO pn junction was fabricated by pulsed laser deposition (PLD). On injecting an electrical current through a pn heterojunction of p-SrCu2O2/n-ZnO, an emission peak centred at 387 nm was observed, originating from excitons or the electron hole plasma in ZnO.
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Ohta et al. (2000) studied this question.
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