A multilayered approach of Si/SiO to promote carrier transport in electroluminescence of Si nanocrystals.
A multilayered approach of Si/SiO to promote carrier transport in electroluminescence of Si nanocrystals.
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DOI：
10.1186/1556-276x-7-200
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发表时间：
2012-03-27
影响因子：
--
通讯作者：
Lu M
中科院分区：
文献类型：
--
作者：
Li D;Chen YB;Ren Y;Zhu J;Zhao YY;Lu M
研究了Si/SiO多层样品中的Si纳米晶(Si-NC)的电致发光和光致发光。炉内退火后，在Si和SiO层中形成了Si-NC。研究发现，Si过渡层的存在为EL发射创造了额外的载流子路径。进一步对多层Si/SiO样品和Si和SiO均匀混合的单层样品进行了比较研究。两种样品具有相同的Si/O比和相同的Si和O含量。多层样品比单层样品具有更高的EL强度、更低的开启电压、更低的电阻和更高的电流效率。结果表明，Si/SiO中的Si过渡层可能起到载流子通道的作用，促进了载流子的输运，增强了Si-NC的电致发光。
The electroluminescence (EL) and photoluminescence of Si nanocrystals (Si-nc) from multilayered samples of Si/SiO are investigated. Si-nc are formed within Si and SiO layers after furnace annealing. It is found that the presence of Si interlayers creates extra carrier paths for EL emission. A comparative study is further performed on a multilayered Si/SiO sample and a single-layered one with Si and SiO homogeneously mixed. Both samples have the same ratio of Si to O and the same contents of Si and O. The multilayered sample is found to have higher EL intensity, less turn-on voltage, lower resistance, and higher current efficiency than the single-layered one. The results indicate that Si interlayers in Si/SiO may act as carrier channels, which promote carrier transport and enhance the EL emission of Si-nc.