Photothermal Deflection Spectroscopy Study of Nanocrystalline Si (nc-Si) Thin Films Deposited on Porous Aluminum with PECVD

Enhanced and stable photoluminescence from partially oxidized porous Si coated with Si thin films

Photoluminescence ~PL! spectra of partially oxidized porous Si ~POPS! coated with Si thin films were examined using the 488 nm line of Ar laser. The obtained PL is stable, peaks at 1.763 eV with a blueshift of ;60 meV, and its maximal intensity is seven times larger than that of the POPS. Spectral analysis and the experimental results from infrared spectroscopy and electron spin resonance sugge...

Crystallization of amorphous silicon thin films deposited by PECVD on nickel-metalized porous silicon

Porous silicon layers were elaborated by electrochemical etching of heavily doped p-type silicon substrates. Metallization of porous silicon was carried out by immersion of substrates in diluted aqueous solution of nickel. Amorphous silicon thin films were deposited by plasma-enhanced chemical vapor deposition on metalized porous layers. Deposited amorphous thin films were crystallized under va...

Amorphous Carbon Thin Films Deposited on Si and PET: Study of Interface States

Thin carbon films with various thicknesses, deposited on different substrates (Si and poly-ethylene-terephthalate) at the same operating conditions in a radio frequency plasma enhanced chemical vapour deposition system were characterized by Doppler broadening spectroscopy. The films and the substrates were depth profiled by a slow positron beam. The aim of these measurements was to study the op...

Passivation of Si Surfaces by PECVD Aluminum Oxide

First-principles study of ferromagnetism in epitaxial Si-Mn thin films on Si(001).

Density-functional theory calculations are employed to investigate both the epitaxial growth and the magnetic properties of thin Mn and MnSi films on Si(001). For single Mn adatoms, we find a preference for the second-layer interstitial site. While a monolayer Mn film is energetically unfavorable, a capping-Si layer significantly enhances the thermodynamic stability and induces a change from an...