On electric conduction of amorphous silicon carbonitride derived from a polymeric precursor
On electric conduction of amorphous silicon carbonitride derived from a polymeric precursor
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DOI：
10.1063/1.4809825
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发表时间：
2013-06
影响因子：
4
通讯作者：
Yaohan Chen;Fuqian Yang;L. An
中科院分区：
文献类型：
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作者：
Yaohan Chen;Fuqian Yang;L. An
研究了一个长期存在的问题，即由聚合物前驱体制备的非晶碳氮化硅的电导率随热解温度的升高而显著增加。我们发现，电导率表现出Arrhenius依赖于热解温度，与活化能为3.41 eV。使用拉曼光谱的结构分析表明，在材料内的游离碳经历了一个sp3-到sp2的转变，随着热解温度的增加，与活化能为3.6 eV。我们得出结论，裂解温度引起的电导率的增加主要是由于游离碳的电导率的增加。提出了一个简单的模型来关联两者。
A long-existing problem that the conductivity of amorphous silicon carbonitrides derived from polymeric precursor increases significantly with pyrolysis temperature is investigated. We show that the conductivity exhibited an Arrhenius dependence on pyrolysis temperature, with the activation energy of ∼3.41 eV. Structural analysis using Raman spectroscopy reveals that the free carbon within the material undergoes a sp3-to-sp2 transition as pyrolysis temperature increases, with the activation energy of ∼3.6 eV. We conclude that the pyrolysis-temperature induced increase in the conductivity is mainly due to the increase in the conductivity of the free carbon. A simple model is proposed to correlate the two.