Abstract
AbstractAccurately identifying the local structural heterogeneity of complex, disordered amorphous materials such as amorphous silicon is crucial for accelerating technology development. However, short-range atomic ordering quantification and nanoscale spatial resolution over a large area on a-Si have remained major challenges and practically unexplored. We resolve phonon vibrational modes of a-Si at a lateral resolution of <60 nm by tip-enhanced Raman spectroscopy. To project the high dimensional TERS imaging to a two-dimensional manifold space and categorize amorphous silicon structure, we developed a multiresolution manifold learning algorithm. It allows for quantifying average Si-Si distortion angle and the strain free energy at nanoscale without a human-specified physical threshold. The multiresolution feature of the multiresolution manifold learning allows for distilling local defects of ultra-low abundance (< 0.3%), presenting a new Raman mode at finer resolution grids. This work promises a general paradigm of resolving nanoscale structural heterogeneity and updating domain knowledge for highly disordered materials.
Funder
U.S. Department of Energy
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry
Reference88 articles.
1. Chen, R. et al. Nanophotonic integrated circuits from nanoresonators grown on silicon. Nat. Commun. 5, 1–10 (2014).
2. Vivien, L. & Pavesi, L. Handbook of Silicon Photonics (Taylor & Francis, 2016).
3. Ndiaye, A. et al. Degradations of silicon photovoltaic modules: a literature review. Sol. Energy 96, 140–151 (2013).
4. Kim, J. et al. 10.5% efficient polymer and amorphous silicon hybrid tandem photovoltaic cell. Nat. Commun. 6, 1–6 (2015).
5. Hou, T. et al. The influence of FEC on the solvation structure and reduction reaction of LiPF6/EC electrolytes and its implication for solid electrolyte interphase formation. Nano Energy 64, 103881 (2019).
Cited by
23 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献