Doping nanocrystals by in situ layer-by-layer overcoating
Doping nanocrystals by in situ layer-by-layer overcoating
复制标题
通过原位逐层涂层掺杂纳米晶体
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Hong
中科院分区：
文献类型：
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作者：
Hsueh‐Shih Chen;R. Kumar;H. Hong
我们证明了内部掺杂的纳米晶体可以通过原位覆盖工艺获得。在碘掺杂ZnSe的情况下，ZnSe芯被交错的碘层和ZnSe层覆盖，以将碘原子纳入ZnSe基体中。随着碘/ZnSe包覆层数量的增加，ZnSe带边缘的光致发光逐渐降低，而碘引起的深能级复合的发光则显著提高，达到4倍。这一结果表明杂质原子被掺入到基体中。
We demonstrate that internally doped nanocrystals can be obtained by an in situ overcoating process. In the case of ZnSe doped with iodine, ZnSe cores are overcoated by interlaced iodine layers and ZnSe layers to incorporate the iodine atoms into the ZnSe matrix. Photoluminescence from the ZnSe band edge is gradually depressed, while emission from the deep-level recombination caused by iodine is dramatically improved up to fourfolds with increasing number of iodine/ZnSe overcoats. This result suggests that the impurity atoms are incorporated into the host matrix.