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Microstructure and optical properties of free-standing porous silicon films: Size dependence of absorption spectra in Si nanometer-sized crystallites
Open accessAbstract
We have studied the microstructure and optical properties of free-standing porous Si thin films fabricated by electrochemical anodization. Raman-spectroscopy and transmission-electron-microscopy examinations show that Si crystallite spheres with diameters of several nanometers are dispersed in the amorphous phase. The blueshift of the optical-absorption spectrum is observed for decreasing average diameter of the Si crystallites. However, there is no clear size dependence of the peak energy of the broad photoluminescence (PL) spectrum. Spectroscopic analysis strongly suggests that the photogeneration of carriers occurs in the c-Si core, whose band gap is modified by the quantum-confinement effect, while the strong PL comes from the near-surface region of small crystallites.
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Citations
Cited by
Size dependence of nanostructures: Impact of bond order deficiency
Sun, C. Q. (2007) · Progress in Solid State Chemistry · doi:10.1016/j.progsolidstchem.2006.03.001 · Cited by 873
Moriarty, P. (2001) · Reports on Progress in Physics · doi:10.1088/0034-4885/64/3/201 · Cited by 785
Porous silicon chemical sensors and biosensors: A review
Harraz, F. A. (2014) · Sensors and Actuators B: Chemical · doi:10.1016/j.snb.2014.06.048 · Cited by 340
Wu, X. L., Xiong, S. J., Zhu, J., Wang, J., Shen, J. C., & Chu, P. K. (2009) · Nano Letters · doi:10.1021/nl902226u · Cited by 120
Metadata
- Authors
- Kanemitsu, Y., Uto, H., Masumoto, Y., Matsumoto, T., Futagi, T., & Mimura, H.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 1993-07-15
- Volume
- 48
- Issue
- 4
- Pages
- 2827-2830
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W2088069779
- Cited by
- 453
- References
- 0
- FWCI
- 25.57
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Microstructure and optical properties of free-standing porous silicon films: Size dependence of absorption spectra in Si nanometer-sized crystallites. https://app.cochat.ai/papers/10.1103/physrevb.48.2827
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- Kanemitsu, Y., Uto, H., Masumoto, Y., Matsumoto, T., Futagi, T., & Mimura, H. (1993). Microstructure and optical properties of free-standing porous silicon films: Size dependence of absorption spectra in Si nanometer-sized crystallites. Physical Review B. https://doi.org/10.1103/physrevb.48.2827
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