Silicon nanocrystals with ensemble quantum yields exceeding 60%
Silicon nanocrystals with ensemble quantum yields exceeding 60%
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DOI：
10.1063/1.2210788
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发表时间：
2006-06-05
影响因子：
4
通讯作者：
Kortshagen, Uwe
中科院分区：
文献类型：
--
作者：
Jurbergs, David;Rogojina, Elena;Kortshagen, Uwe
直径小于5 nm的硅纳米晶在室温下表现出高效的光致发光。对于硅量子点的系综，以前关于光致发光量子产率的报道通常在几个百分点的范围内，通常不到30%。在这里，我们报道了等离子体合成硅量子点及其随后的湿化学表面钝化有机配体下。严格排除氧气。在约789 nm的峰值波长获得了超过60%的光致发光量子产率。(C)2006年美国物理研究所。
Silicon nanocrystals with diameters of less than 5 nm 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 789 nm. (c) 2006 American Institute of Physics.