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Gold-Hyperdoped Black Silicon With High IR Absorption by Femtosecond Laser Irradiation.
- Source :
- IEEE Transactions on Nanotechnology; May2017, Vol. 16 Issue 3, p502-506, 5p
- Publication Year :
- 2017
-
Abstract
- Gold (Au)-doped-textured silicon (Si) material with a thermostable absorption below bandgap (>50%) is obtained by femtosecond laser irradiation. Although the concentration of Au impurity (1019 cm−3 ) in textured Si is at least four orders of magnitude greater than the solid solubility of Au in crystalline Si, the sheet carrier density (approximately 1010 cm−2) in Au-doped Si is very low due to a self-compensation effect of Au impurity in Si material. The infrared absorption of Au-doped Si is related to laser-induced-structural defects and sub-band absorption of deep energy levels of Au in Si, which is determined by temperature-dependent Hall Effect measurement. Besides supersaturated doping of Au, a gold silicide phase is formed at textured Si surface. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 1536125X
- Volume :
- 16
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Nanotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 123209265
- Full Text :
- https://doi.org/10.1109/TNANO.2017.2693691