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纳米硅光学特性的研究
Authors
孔光临
廖显伯
马智训
Publication date
1 January 1999
Publisher
Abstract
结合微区Ramman谱,研究了镶嵌在SiO_2基质中纳米硅的吸收谱和光致发光谱。观测到了吸收边随纳米硅尺寸的减小而蓝移的现象。并发现在1.9~3.0eV的能量范围内,纳米硅的吸收系数与能量的关系为一指数关系,这可能是间接带隙的特征,在0.95~1.6eV之间存在次带吸收,这归因于包括非晶相在内的纳米硅表面态和缺陷态。通过发光谱和吸收谱的比较,认为声子可能参与了发光过程
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Last time updated on 15/03/2019