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直接带隙半导体的计算设计,该半导体的晶格匹配
1Department of Physics, The Pennsylvania State University, 104 Davey Lab, University Park, Pennsylvania 16802-6300, USA.
Nature
|May 9, 2001
概括
研究人员通过计算设计了新的直带间隙半导体合金. 这些材料与晶格匹配的相匹配,使集成光子学能够有效发射光.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 光电学是指光电子产品.
背景情况:
- 晶体是一种间接带隙半导体,在光发射方面效率低下.
- 将电子与光学元件集成需要光学活跃,直带隙材料,这些材料可以在上生长,具有高质量的接口.
- 晶格匹配对于高质量的表轴生长至关重要,但目前没有直接带隙半导体与晶格匹配.
研究的目的:
- 通过计算设计新的直带间隙半导体合金.
- 识别可以在上合成并表现出理想光学特性的材料.
- 为应对将电子与光学功能的整合所面临的挑战.
主要方法:
- 假设直带间隙半导体合金的计算设计.
- 对的格子匹配特性进行分析.
- 计算带隙以确定光学发射频率.
主要成果:
- 设计了两个假设的直带间隙半导体合金.
- 这些合金的晶格不匹配率仅为0.5-1%与低米勒索引平面上的.
- 计算的带隙属于光纤的最小吸收窗口.
结论:
- 设计的合金为将电子与光学元件集成提供了直接的解决方案.
- 建议通过沉积特定的IV组前体分子进行合成.
- 这些材料有望在光子学应用中有效发光.
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