Silicon nanocrystals with ensemble quantum yields exceeding 60%
David JurbergsInnovalight, Inc. , 3303 Octavius Drive, Ste. 104, Santa Clara, California 95054Elena RogojinaInnovalight, Inc. , 3303 Octavius Drive, Ste. 104, Santa Clara, California 95054Lorenzo MangoliniUniversity of Minnesota Department of Mechanical Engineering, , 111 Church Street Southeast (SE), Minneapolis, Minnesota 55455Uwe KortshagenUniversity of Minnesota Department of Mechanical Engineering, , 111 Church Street Southeast (SE), Minneapolis, Minnesota 55455
2006en
ABI
Annotatsiya
Silicon nanocrystals with diameters of less than 5nm show efficient photoluminescence at room temperature. For ensembles of silicon quantum dots, previous reports of photoluminescence quantum yields have usually been in the few percent range, and generally less than 30%. Here we report the plasma synthesis of silicon quantum dots and their subsequent wet-chemical surface passivation with organic ligands under strict exclusion of oxygen. Photoluminescence quantum yields exceeding 60% have been achieved at peak wavelengths of about 789nm.
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