In situ passivation and blue luminescence of silicon clusters using a cluster beam/H2O codeposition production method

Brewer, A.; von Haeften, K.
June 2009
Applied Physics Letters;6/29/2009, Vol. 94 Issue 26, p261102
Academic Journal
Si clusters are produced in a gas aggregation source and fly through ultrahigh vacuum onto a cold target where they are codeposited with water vapor. Melting of the ice yields immediately a suspension of nanoparticles that emits intense, nondegrading luminescence in the blue wavelength range. Spectroscopic analysis reveals a Si/SiO core-shell structure where the luminescence stems from oxygen deficient defects. The main advantage of our production method is that it yields the luminescent Si nanoparticles in one step.


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