Exploring novel two-dimensional carbon-based materials with superior properties is of special importance for applications in nano-optoelectronics. Here, based on theoretical calculations, a silicon–carbon (Si₂C) monolayer is explored, offering desirable properties with strain and surface functionalization. The pristine Si₂C monolayer is dynamically unstable, but a small tensile strain of +2.5% and fluorination can make it more dynamically stable. The pristine Si₂C monolayer is a direct semiconductor with a moderate bandgap, whose gap and exciton binding energy can be continuously tuned by strain engineering. Also, the tensile strain (fluorination) on the Si₂C monolayer can induce a variation in optical transitions, thus resulting in a significant red-shift (blue-shift) of the optical absorption spectrum. In short, the Si₂C monolayer under tensile strain and fluorination is unique, making it a promising candidate for nano-optoelectronics.

中文翻译：

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通过应变和表面功能化增强硅碳单层的稳定性和可调光电性能

探索具有优异性能的新型二维碳基材料对于纳米光电子学的应用特别重要。在这里，基于理论计算，探索了硅碳（Si ₂ C）单层，它提供了具有应变和表面功能化的理想特性。原始的Si ₂ C单层是动态不稳定的，但+2.5%的小拉伸应变和氟化可以使其更加动态稳定。原始的Si ₂ C单层是具有中等带隙的直接半导体，其带隙和激子结合能可以通过应变工程连续调节。此外，Si ₂ C单层上的拉伸应变（氟化）可以引起光学跃迁的变化，从而导致光学吸收光谱的显着红移（蓝移）。简而言之，拉伸应变和氟化作用下的 Si ₂ C 单层是独特的，使其成为纳米光电子学的有希望的候选者。