Visible Photoluminescence from Si Microcrystals Embedded in SiO₂ Glass Films

Abstract

The design and operation of a CO:! laser based on a glow discharge in a metal tube is described. Up to 15 W power was obtained. The operating voltage is low compared with a similar discharge in an insulating tube.

Low-dimensional SiC nanostructures: Fabrication, luminescence, and electrical properties

“…There have been several reports on embedding Si nanocrystals into SiO 2 films to generate visible PL [82,83]. Due to the much larger band gap of bulk SiO 2 (9.3 eV) [84] compared to that of Si (1.12 eV) [12], carriers can be confined in the Si crystallites.…”

Structural and optical properties of Si-nanoclusters embedded in silicon dioxide

“…Methods of plasma-enhanced chemical vapor deposition were used as well, also allowing the doping of layers by impurities as nitrogen and hydrogen [8,9]. Another effective method is the co-sputtering of silicon dioxide and pure silicon [10][11][12]. In all cases the option of thermal anneal of produced structures, typically in a range of temperatures up to 1200 1C, is employed beneficially.…”

XPS study of ion‐beam‐assisted formation of Si nanostructures in thin SiO2 layers

“…9 -11,13 The formation of Si nanocrystals embedded in SiO 2 was claimed when the substrate temperatures during deposition exceeded 400°C. 9,10,13 However, deposition of co-sputtered Si and SiO 2 without intentional heating of the substrates does not lead to the appearance of nanocrystals in the as-prepared layers. 11 One can conclude that crystallization is provided by a combination of thermal and ion-induced processes.…”