Using conventional method of making visible light emitting porous silicon, an emitting sample with even visible light,detected by naked eyes. is prepared on unpolished polycrystal silicon wafer. The specimen's photoluminescence spectrum has been obtained. The PL spectrum is demonstrated to be a typical spectrum of visible light emitting porous silicon specimen. The whole structure of the visible light emitting porous silicon specimen has been studied .by using scanning electron microscopy(SEM),and clear mi...
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