基于第一原则计算的BA/INS异质连接可调节的电子和光学特性
1School of Materials Science and Engineering, Chang'an University, Xi'an 710064, People's Republic of China.
概括
毕苏/硫化 (BAs/InS) 异构结构表现出极好的稳定性和II型带对齐,促进有效的电荷分离. 外部电场和应力可以调整它们的电子和光学特性,用于光电子应用.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 计算化学计算化学
背景情况:
- (BAs) 和硫化 (InS) 是具有独特电子特性的二维材料.
- 通过堆叠不同的二维材料形成的异构结构可以表现出新的功能.
- 了解BA/INS异构结构的界面特性对于它们的潜在应用至关重要.
研究的目的:
- 研究BA/INS异构结构的结构,电子和光学特性.
- 探索BA/INS异构结构的稳定性和堆叠配置.
- 分析外部刺激 (电场,应力) 对BA/INS异构结构的影响.
主要方法:
- 基于密度函数理论 (DFT) 的第一原则计算.
- 分析几何结构,波段对齐和电子传输.
- 在外部干扰下对光学吸收光谱的研究.
主要成果:
- H1堆叠的BA/INS异构结构表现出增强的稳定性,层间距离为3.6 Å.
- 异构结构表现出II型波段对齐,促进光生成的电子孔对形成.
- 外部电场和应力可以调整带线对齐,诱导I型行为,并从间接向直接的带隙过渡.
- 光学吸收系数适度增强,可以通过外部场和应力进行调整.
结论:
- 对于光电子设备来说,BA/INS异构结构具有有利的稳定性和电子特性.
- 可通过外部刺激调节的电子和光学特征提供了设计灵活性.
- 这些发现突显了BA/INS异构在光电探测器和激光技术中的潜力.
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