Enhancement in optical absorption of silicon fibrous nanostructure produced using femtosecond laser ablation

Journal Article · Mon Jul 20 00:00:00 EDT 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3168499· OSTI ID:21294203

Mahmood, Abdul Salam; Venkatakrishnan, Krishnan ^[1]; Sivakumar, M; Tan, Bo ^[2]

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1. Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3 (Canada)
2. Department of Aerospace Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3 (Canada)

Fibrous nanostructures are proposed for the application of solar cell. Irradiation of silicon surface with a few hundred femtosecond laser pulses of fluence 13 kJ/m{sup 2} at 13 MHz pulse frequency in air atmosphere results in the formation of fibrous nanostructure layer on the treated surface that leads to a significant decrease in the reflection of visible radiation. For the visible wavelength, the decreased reflection is a result of the nature of the nanostructure. The Raman peak shift in the irradiated surface confirms that the surface is changed to amorphous silicon due to fibrous nanostructure formation.

• OSTI ID: 21294203
• Journal Information: Applied Physics Letters, Vol. 95, Issue 3; Other Information: DOI: 10.1063/1.3168499; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ABLATION
ABSORPTION
LAYERS
MHZ RANGE 01-100
NANOSTRUCTURES
PULSES
RAMAN SPECTRA
SEMICONDUCTOR LASERS
SILICON
SOLAR CELLS
VISIBLE RADIATION
WAVELENGTHS